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class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#366"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>366</span> </div> </a> <ul id="toc-366-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-396_and_402" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#396_and_402"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>396 and 402</span> </div> </a> <ul id="toc-396_and_402-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-427" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#427"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3</span> <span>427</span> </div> </a> <ul id="toc-427-sublist" class="vector-toc-list"> <li id="toc-ZL1" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#ZL1"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3.1</span> <span>ZL1</span> </div> </a> <ul id="toc-ZL1-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mark_IV_427_performance_specifications" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Mark_IV_427_performance_specifications"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3.2</span> <span>Mark IV 427 performance specifications</span> </div> </a> <ul id="toc-Mark_IV_427_performance_specifications-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-454" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#454"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.4</span> <span>454</span> </div> </a> <ul id="toc-454-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-L19" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#L19"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.5</span> <span>L19</span> </div> </a> <ul id="toc-L19-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Commercial_applications" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Commercial_applications"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.6</span> <span>Commercial applications</span> </div> </a> <ul id="toc-Commercial_applications-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Generation_V" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Generation_V"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Generation V</span> </div> </a> <button aria-controls="toc-Generation_V-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Generation V subsection</span> </button> <ul id="toc-Generation_V-sublist" class="vector-toc-list"> <li id="toc-6.0_(L50)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#6.0_(L50)"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>6.0 (L50)</span> </div> </a> <ul id="toc-6.0_(L50)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-L19_2" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#L19_2"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2</span> <span>L19</span> </div> </a> <ul id="toc-L19_2-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-502" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#502"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.3</span> <span>502</span> </div> </a> <ul id="toc-502-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-ZZ572" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#ZZ572"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.4</span> <span>ZZ572</span> </div> </a> <ul id="toc-ZZ572-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-ZZ632" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#ZZ632"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.5</span> <span>ZZ632</span> </div> </a> <ul id="toc-ZZ632-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Generation_VI" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Generation_VI"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Generation VI</span> </div> </a> <button aria-controls="toc-Generation_VI-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Generation VI subsection</span> </button> <ul id="toc-Generation_VI-sublist" class="vector-toc-list"> <li id="toc-Vortec_7400_(L29)" class="vector-toc-list-item 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href="https://www.jstor.org/action/doBasicSearch?Query=%22Chevrolet+big-block+engine%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">July 2013</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1251242444"><table class="box-Lead_too_short plainlinks metadata ambox ambox-content ambox-lead_too_short" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Wiki_letter_w.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/6/6c/Wiki_letter_w.svg/40px-Wiki_letter_w.svg.png" decoding="async" width="40" height="40" class="mw-file-element" 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</div> </div><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Reciprocating internal combustion engine</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox hproduct"><tbody><tr><th colspan="2" class="infobox-above fn" style="background-color:#C0C0C0; padding:4px; text-align:center">Chevrolet big-block engine</th></tr><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:2014_Rolling_Sculpture_Car_Show_47_(1970_Chevrolet_Chevelle_SS_454_engine).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg/280px-2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg" decoding="async" width="280" height="210" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg/420px-2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c1/2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg/560px-2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg 2x" data-file-width="3072" data-file-height="2304" /></a></span><div class="infobox-caption" style="font-size:95%">454 big-block in a 1970 Chevrolet Chevelle SS</div></td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#C0C0C0">Overview</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Automotive_industry" title="Automotive industry">Manufacturer</a></th><td class="infobox-data"><a href="/wiki/General_Motors" title="General Motors">General Motors</a></td></tr><tr><th scope="row" class="infobox-label">Production</th><td class="infobox-data">1955–present</td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#C0C0C0">Layout</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Engine_configuration" title="Engine configuration">Configuration</a></th><td class="infobox-data"><a href="/wiki/Naturally_aspirated" class="mw-redirect" title="Naturally aspirated">Naturally aspirated</a> 90° <a href="/wiki/V8_engine" title="V8 engine">V8</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Engine_displacement" title="Engine displacement">Displacement</a></th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li>348 <a href="/wiki/Cubic_inch" title="Cubic inch">cu in</a> (5.7 <a href="/wiki/Litre" title="Litre">L</a>)</li><li>366 cu in (6.0 L)</li><li>396 cu in (6.5 L)</li><li>402 cu in (6.6 L)</li><li>409 cu in (6.7 L)</li><li>427 cu in (7.0 L)</li><li>454 cu in (7.4 L)</li><li>496 cu in (8.1 L)</li><li>Aftermarket only:</li><li>502 cu in (8.2 L)</li><li>572 cu in (9.4 L)</li><li>622 cu in (10.2 L)<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></li><li>632 cu in (10.4 L)</li></ul></div></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Bore_(engine)" title="Bore (engine)">Cylinder bore</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li>3.935 <a href="/wiki/Inch" title="Inch">in</a> (99.9 <a href="/wiki/Millimetre" title="Millimetre">mm</a>)</li><li>4.094 in (104.0 mm)</li><li><style data-mw-deduplicate="TemplateStyles:r1154941027">.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .den{vertical-align:sub}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}</style><span class="frac">4<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">8</span></span> in (104.8 mm)</li><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">4<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">4</span></span> in (108.0 mm)</li><li>4.31 in (109.5 mm)</li><li>4.466 in (113.4 mm)</li><li>4.56 in (115.8 mm)</li><li>4.6 in (116.8 mm)</li></ul></div></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Stroke_(engine)" title="Stroke (engine)">Piston stroke</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"><div class="plainlist"><ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">3<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">4</span></span> in (82.6 mm)</li><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">3<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">2</span></span> in (88.9 mm)</li><li>3.65 in (92.7 mm)</li><li>3.76 in (95.5 mm)</li><li>4 in (101.6 mm)</li><li>4.37 in (111.0 mm)</li><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">4<span class="sr-only">+</span><span class="num">3</span>⁄<span class="den">8</span></span> in (111.1 mm)</li><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">4<span class="sr-only">+</span><span class="num">3</span>⁄<span class="den">4</span></span> in (120.7 mm)</li></ul></div></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Engine_block" title="Engine block">Cylinder block</a> material</th><td class="infobox-data"><a href="/wiki/Cast_iron" title="Cast iron">Cast iron</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Cylinder_head" title="Cylinder head">Cylinder head</a> material</th><td class="infobox-data">Cast iron, <a href="/wiki/Aluminum" class="mw-redirect" title="Aluminum">aluminum</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Valvetrain" title="Valvetrain">Valvetrain</a></th><td class="infobox-data"><a href="/wiki/Overhead_valve_engine" title="Overhead valve engine">OHV</a> 2 <a href="/wiki/Poppet_valve" title="Poppet valve">valves</a> × <a href="/wiki/Cylinder_(engine)" title="Cylinder (engine)">cyl</a>.</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Compression_ratio" title="Compression ratio">Compression ratio</a></th><td class="infobox-data">8.5:1, 9.0:1, 10.25:1, 11.0:1, 12.0:1, 12.5:1, 13.5:1</td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#C0C0C0">Combustion</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Fuel" title="Fuel">Fuel</a> system</th><td class="infobox-data"><a href="/wiki/Carburetor" title="Carburetor">Carburetor</a><br /><a href="/wiki/Fuel_injection" title="Fuel injection">Fuel injection</a> (Since Gen. V)</td></tr><tr><th scope="row" class="infobox-label">Fuel type</th><td class="infobox-data"><a href="/wiki/Gasoline" title="Gasoline">Gasoline</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Engine_cooling" class="mw-redirect" title="Engine cooling">Cooling system</a></th><td class="infobox-data"><a href="/wiki/Radiator_(engine_cooling)" title="Radiator (engine cooling)">Water-cooled</a></td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#C0C0C0">Output</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Power_(physics)" title="Power (physics)">Power output</a></th><td class="infobox-data">250–1,004 <a href="/wiki/Horsepower" title="Horsepower">hp</a> (186–749 <a href="/wiki/Kilowatt" class="mw-redirect" title="Kilowatt">kW</a>)</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Torque" title="Torque">Torque output</a></th><td class="infobox-data">385–876 <a href="/wiki/Pound-foot_(torque)" title="Pound-foot (torque)">lb⋅ft</a> (522–1,188 <a href="/wiki/Newton-metre" title="Newton-metre">N⋅m</a>)</td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#C0C0C0">Dimensions</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Vehicle_weight#Dry_weight" title="Vehicle weight">Dry weight</a></th><td class="infobox-data">517–761 <a href="/wiki/Pound_(mass)" title="Pound (mass)">lb</a> (235–345 <a href="/wiki/Kilogram" title="Kilogram">kg</a>)<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup></td></tr></tbody></table> <p>The <b>Chevrolet "big-block"</b> engine is a term for a series of <a href="/wiki/Engine_displacement" title="Engine displacement">large-displacement</a>, <a href="/wiki/Naturally-aspirated" class="mw-redirect" title="Naturally-aspirated">naturally-aspirated</a>, 90°, <a href="/wiki/Overhead_valve" class="mw-redirect" title="Overhead valve">overhead valve</a>, <a href="/wiki/Gasoline_engine" class="mw-redirect" title="Gasoline engine">gasoline</a>-powered, <a href="/wiki/V8_engine" title="V8 engine">V8</a> <a href="/wiki/Internal_combustion_engine" title="Internal combustion engine">engines</a>; that were developed and produced by the <a href="/wiki/Chevrolet_Division" class="mw-redirect" title="Chevrolet Division">Chevrolet Division</a> of <a href="/wiki/General_Motors" title="General Motors">General Motors</a>, from the 1950s until present. </p><p>Chevrolet had introduced its popular <a href="/wiki/Chevrolet_small-block_engine_(first_and_second_generation)" class="mw-redirect" title="Chevrolet small-block engine (first and second generation)">small-block V8</a> in 1955, but needed something larger to power its <a href="/wiki/Chevrolet_Kodiak" title="Chevrolet Kodiak">medium duty trucks</a> and the heavier cars that were on the drawing board. The big-block,<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> which debuted in 1958 at 348 <a href="/wiki/Cubic_inch" title="Cubic inch">cu in</a> (5.7 <a href="/wiki/Litre" title="Litre">L</a>), was built in standard displacements up to 496 cu in (8.1 L), with aftermarket <a href="/wiki/Crate_engine" class="mw-redirect" title="Crate engine">crate engines</a> sold by Chevrolet exceeding 500 cu in (8.2 L). </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Mark_I_(W-series)"><span id="Mark_I_.28W-series.29"></span>Mark I (W-series)</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=1" title="Edit section: Mark I (W-series)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The first version of the "big-block" V8 Chevrolet engine, known as the W-series, was introduced in 1958.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Chevrolet designed this engine for use in passenger cars and light trucks. This engine had an <a href="/wiki/Overhead_valve" class="mw-redirect" title="Overhead valve">overhead valve</a> design with offset valves and uniquely scalloped <a href="/wiki/Valve_cover" class="mw-redirect" title="Valve cover">valve covers</a>, giving it a distinctive appearance. The W-series was produced from 1958 to 1965, in three <a href="/wiki/Engine_displacement" title="Engine displacement">displacements</a>: </p> <ul><li>348 cu in (5.7 L), available from 1958 to 1961 in cars, and in light trucks through 1964;</li> <li>409 cu in (6.7 L), available from 1961 to 1965; and</li> <li>427 cu in (7.0 L), available in 1962 and 1963.</li></ul> <p>The W-series engine was made of <a href="/wiki/Cast_iron" title="Cast iron">cast iron</a>. The engine block had 4.84-inch (123 mm) bore centers, two-bolt <a href="/wiki/Main_bearing" title="Main bearing">main bearing</a> caps, a "side oiling" <a href="/wiki/Motor_oil" title="Motor oil">lubrication system</a> (the main oil gallery located low on the driver's side of the crankcase), with full-flow oil filter, and interchangeable <a href="/wiki/Cylinder_head" title="Cylinder head">cylinder heads</a>. Heads used on the high performance 409 and 427 engines had larger ports and valves than those used on the 348 and the base 409 passenger car and truck engines, but externally were identical to the standard units – but for the location of the engine oil dipstick, on the driver's side on the 348 and the passenger's on the 409/427. No satisfactory explanation was ever offered for why this change was made, but it did provide a reliable means of distinguishing a 348 from the larger engines. </p><p>As with the 265 and 283 cu in (4.3 and 4.6 L) "small-block" engines, the W-series <a href="/wiki/Poppet_valve" title="Poppet valve">valve</a> gear consisted of tubular steel <a href="/wiki/Pushrod" class="mw-redirect" title="Pushrod">pushrods</a> operating stud-mounted, stamped-steel rocker arms. The push rods also acted as conduits for oil flow to the valve gear. Due to the relatively low mass of the valve train, mechanical lifter versions of the W-series engine were capable of operating at speeds well beyond 6000 <a href="/wiki/Revolutions_per_minute" title="Revolutions per minute">rpm</a>. </p><p>The <a href="/wiki/Combustion_chamber" title="Combustion chamber">combustion chamber</a> of the W-series engine was in the upper part of the <a href="/wiki/Cylinder_(engine)" title="Cylinder (engine)">cylinder</a>, not the head, the head having only tiny recesses for the valves. This arrangement was achieved by combining a cylinder head deck that was not perpendicular to the bore with a crowned <a href="/wiki/Piston" title="Piston">piston</a>, which was a novel concept in American production engines of the day. As the piston approached <a href="/wiki/Top_dead_center" class="mw-redirect" title="Top dead center">top dead center</a>, the angle of the crown combined with that of the head deck to form a wedge-shaped combustion chamber with a pronounced quench area. The spark plugs were inserted vertically into the quench area, which helped to produce a rapidly moving flame front for more complete combustion. </p><p>The theory behind this sort of arrangement is that maximum <a href="/wiki/Mean_effective_pressure" title="Mean effective pressure">brake mean effective pressure (BMEP)</a> is developed at relatively low engine speeds, resulting in an engine with a broad <a href="/wiki/Torque" title="Torque">torque</a> curve. With its relatively flat torque characteristics, the "W" engine was well-suited to propelling both the trucks and heavier cars that were in vogue in the US at the time. The W-series was a physically massive engine when compared to the "small-block" Chevrolet engine. It had a dry weight of approximately 665 pounds (302 kg), depending on the type of <a href="/wiki/Intake_manifold" class="mw-redirect" title="Intake manifold">intake manifold</a> and carburetion systems present. It was 1.5 inches longer, 2.6 inches wider, and 0.84 inches shorter than the 283 "small-block".<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p><p>General Motors engineers explained, in 1959, reasons behind the combustion-in-block setup. Anticipating varied future compression ratios in future auto and truck use: "It was obvious that with the combustion chamber placed within the cylinder head, the foundry must retool every time a compression change is in order. The necessity of making special heads to provide a range of compression ratios and to permit attachment of accessory mountings for the various model applications is of serious concern to the manufacturing and service departments ... Inclining the top of the block to 16° and shaping the top of the piston like a gabled roof with a 16° angle resulted in a 32° wedge-shaped combustion space ... The addition of two milled cutouts [in the head] to extend the volume of the combustion wedge can create a compression ratio of 7.5:1; one milled cutout produces a 9.5:1 compression ratio. The difference between the volume of these cutouts provides a wide compression range without making any changes in the piston or cylinder head. The number or size of cutouts is varied simply by adding or removing cutters."<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="348">348</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=2" title="Edit section: 348"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The first iteration of the W-series engine was the 1958 "Turbo-Thrust" 348-cubic-inch (5.7 L), originally intended for use in Chevrolet trucks but also introduced in the larger, heavier 1958 passenger car line. Bore and stroke was <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">4<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">8</span></span> in × <span class="frac">3<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">4</span></span> in (104.8 mm × 82.6 mm), resulting in a substantially <a href="/wiki/Oversquare" class="mw-redirect" title="Oversquare">oversquare</a> design. This engine was superseded by the 409 cu in (6.7 L) as Chevrolet's top performing engine in 1961 and went out of production for cars at the end of that year. It was produced through 1964 for use in large Chevrolet trucks. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:348_W_Block.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/348_W_Block.jpg/220px-348_W_Block.jpg" decoding="async" width="220" height="163" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/348_W_Block.jpg/330px-348_W_Block.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c4/348_W_Block.jpg/440px-348_W_Block.jpg 2x" data-file-width="4540" data-file-height="3355" /></a><figcaption>1958 348 4-barrel engine</figcaption></figure> <p>With a four-barrel <a href="/wiki/Carburetor" title="Carburetor">carburetor</a>, the base Turbo-Thrust produced 250 hp (186 kW). A special "<a href="/wiki/Tri_power" class="mw-redirect" title="Tri power">Tri power</a>" triple-two-barrel version, called the "Super Turbo-Thrust", produced 280 hp (209 kW). A "Special Turbo-Thrust" upped the power output to 305 hp (227 kW) with a single large four-barrel carburetor. Mechanical lifters and Tri power brought the "Special Super Turbo-Thrust" up to 315 hp (235 kW). For 1959 and 1960, high-output versions of the top two engines were produced with 320 hp (239 kW) and 335 hp (250 kW) respectively. In 1961, power was again increased to 340 hp (254 kW) for the single four-barrel model, and 338 hp (252 kW) when equipped with Tri power. </p> <table class="wikitable" style="float:center;"> <caption>Versions </caption> <tbody><tr> <th>First Year </th> <th>Last Year </th> <th>Model Name </th> <th>Features </th> <th>Power (Advertised <a href="/wiki/Horsepower#SAE_gross_power" title="Horsepower">Gross</a>) </th></tr> <tr> <td rowspan="4">1958</td> <td rowspan="3">1961</td> <td>Turbo-Thrust</td> <td>4 barrel</td> <td>250 hp (186 kW) </td></tr> <tr> <td>Super Turbo-Thrust</td> <td>3x2 barrel</td> <td>280 hp (209 kW) </td></tr> <tr> <td>Special Turbo-Thrust</td> <td>4 barrel</td> <td>305 hp (227 kW) </td></tr> <tr> <td rowspan="2">1960</td> <td>Special Super Turbo-Thrust</td> <td>3x2 barrel</td> <td>315 hp (235 kW) </td></tr> <tr> <td rowspan="2">1959</td> <td>Special Turbo-Thrust</td> <td>4 barrel</td> <td>320 hp (239 kW) </td></tr> <tr> <td rowspan="3">1961</td> <td>Special Super Turbo-Thrust</td> <td>3x2 barrel</td> <td>335 hp (250 kW) </td></tr> <tr> <td rowspan="2">1960</td> <td>Special Turbo-Thrust</td> <td>4 barrel</td> <td>340 hp (254 kW) </td></tr> <tr> <td>Special Super Turbo-Thrust</td> <td>3x2 barrel</td> <td>348 hp (260 kW) </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="409">409</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=3" title="Edit section: 409"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:409Dual4Barrel.jpg" class="mw-file-description"><img alt="409 Cubic Inch Engine" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/40/409Dual4Barrel.jpg/220px-409Dual4Barrel.jpg" decoding="async" width="220" height="173" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/40/409Dual4Barrel.jpg/330px-409Dual4Barrel.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/40/409Dual4Barrel.jpg/440px-409Dual4Barrel.jpg 2x" data-file-width="3479" data-file-height="2741" /></a><figcaption>409 Cubic Inch Engine. Dual 4 Barrel 409 hp version</figcaption></figure> <p>A 409 cu in (6.7 L) version was Chevrolet's top regular production engine from 1961 to 1965, with a choice of single or 2X4-barrel <a href="/wiki/Rochester_Products_Division" title="Rochester Products Division">Rochester</a> <a href="/wiki/Carburetor" title="Carburetor">carburetors</a>. <a href="/wiki/Bore_(engine)" title="Bore (engine)">Bore</a> x <a href="/wiki/Stroke_(engine)" title="Stroke (engine)">stroke</a> were both up from the 348 cu in (5.7 L) to 4.31 in × 3.5 in (109.5 mm × 88.9 mm). On December 17, 1960, the 409 engine was announced along with the <a href="/wiki/Chevrolet_Impala_(third_generation)" class="mw-redirect" title="Chevrolet Impala (third generation)">Impala SS (Super Sport)</a> model. The initial version of the engine produced 360 hp (268 kW) with a single 4-barrel <a href="/wiki/Carter_Carburetor" title="Carter Carburetor">Carter AFB</a> carburetor. The same engine was upped to 380 hp (283 kW) in 1962. A 409 hp (305 kW) version of this engine was also available, developing 1 hp per cubic inch with a dual four-barrel aluminum <a href="/wiki/Intake_manifold" class="mw-redirect" title="Intake manifold">intake manifold</a> and two Carter AFB carburetors. It had a <a href="/wiki/Forged_steel" class="mw-redirect" title="Forged steel">forged steel</a> <a href="/wiki/Crankshaft" title="Crankshaft">crankshaft</a>.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> This dual-quad version was immortalized in <a href="/wiki/The_Beach_Boys" title="The Beach Boys">the Beach Boys</a> song titled "<a href="/wiki/409_(song)" title="409 (song)">409</a>". </p><p>In the 1963 model year, output reached 425 bhp (431 PS; 317 kW) at 6000 rpm and 425 lb⋅ft (576 N⋅m) at 4200 rpm of <a href="/wiki/Machine_torque" class="mw-redirect" title="Machine torque">torque</a> with the Rochester 2X4-barrel carburetor setup, a <a href="/wiki/Compression_ratio" title="Compression ratio">compression ratio</a> of 11:1 and a solid lifter <a href="/wiki/Camshaft" title="Camshaft">camshaft</a>.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> The engine was available through mid-1965, when it was replaced by the 396 cu in (6.5 L) 375 hp (280 kW) Mark IV big-block engine. In addition, a 340 hp (254 kW) version of the 409 engine was available from 1963 to 1965, with a single 4-barrel <a href="/wiki/Cast_iron" title="Cast iron">cast iron</a> intake mounting a Rochester 4GC square-bore carburetor, and a <a href="/wiki/Hydraulic_tappet" title="Hydraulic tappet">hydraulic-lifter</a> camshaft. </p> <div class="mw-heading mw-heading3"><h3 id="427_(Z11)"><span id="427_.28Z11.29"></span>427 (Z11)<span class="anchor" id="Z11"></span></h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=4" title="Edit section: 427 (Z11)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A special 427-cubic-inch (7.0 L) version of the 409 engine was used in the <a href="/wiki/Chevrolet_Impala#1963" title="Chevrolet Impala">1963 Impala <i>Sport Coupé</i></a>, ordered under Chevrolet <a href="/wiki/Regular_Production_Option" title="Regular Production Option">Regular Production Option</a> (RPO) Z11.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> This was a special package created for <a href="/wiki/Drag_racing" title="Drag racing">drag racers</a>, as well as <a href="/wiki/NASCAR" title="NASCAR">NASCAR</a>,<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> and it consisted of a cowl-induction 427 cu in (7.0 L) engine and body with selected aluminum stampings. The aluminum body parts were fabricated in <a href="/wiki/Flint,_Michigan" title="Flint, Michigan">Flint, Michigan</a> at the facility now known as GM Flint Metal Center.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> Unlike the later, second-generation 427, it was based on the W-series 409 engine, but with a longer 3.65 in (92.7 mm) stroke. A high-rise, two-piece aluminum intake manifold and dual Carter AFB carburetors fed a 13.5:1 compression ratio to produce an under-rated SAE gross 430 hp (321 kW) and 575 lb⋅ft (780 N⋅m). Fifty RPO Z11 cars were produced at the <a href="/wiki/Flint,_Michigan_auto_industry" class="mw-redirect" title="Flint, Michigan auto industry">Flint GM plant</a>. </p><p>Extant GM Documents show 50 Z11 engines were built at the GM <a href="/wiki/Tonawanda_Engine" title="Tonawanda Engine">Tonawanda Engine</a> plant for auto production, and 20 partial engines were made for replacement/over-the-counter use. There is no evidence from GM that shows 57 cars were built.<sup class="noprint Inline-Template" style="margin-left:0.1em; white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="The text near this tag may need clarification or removal of jargon. (October 2014)">clarification needed</span></a></i>]</sup><sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (October 2014)">citation needed</span></a></i>]</sup> </p> <div class="mw-heading mw-heading2"><h2 id="Mark_II">Mark II</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=5" title="Edit section: Mark II"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The so-called Mystery Motor, known internally as the Mark II or Mark IIS, is a race-only engine produced for the 1963 season.<sup id="cite_ref-Mystery_Motor_20-0" class="reference"><a href="#cite_note-Mystery_Motor-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> Development began with a 409 cu in (6.7 L) version (Mark II) and ended with a 396 cu in (6.5 L) variant; however only the 427 cu in (7.0 L) engine (Mark IIS) was ever raced. It gained its nickname due to the incredible speeds cars equipped with it attained during its debut, being considerably faster than the well known W-series powered cars. The engine was first used in <a href="/wiki/Mickey_Thompson" title="Mickey Thompson">Mickey Thompson</a>'s Z-06 Corvettes at Daytona in the 1963 Daytona 250 Miles – American Challenge Cup,<sup id="cite_ref-Hot_Rod_21-0" class="reference"><a href="#cite_note-Hot_Rod-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> and then in <a href="/wiki/1963_Daytona_500" title="1963 Daytona 500">1963 Daytona 500</a> where the number 13 car, driven by <a href="/wiki/Johnny_Rutherford" title="Johnny Rutherford">Johnny Rutherford</a>,<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> finished four laps down (in ninth place), with the top five cars being the heavier 1963 <a href="/wiki/Ford_Galaxie" title="Ford Galaxie">Ford Galaxie</a> 500's. This "secret" engine was a unique design incorporating aspects of both the W-series and the mid-1965 introduced Mark IV,<sup id="cite_ref-Mystery_Motor_20-1" class="reference"><a href="#cite_note-Mystery_Motor-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> referred to in sales literature as the "Turbo-Jet V8". </p> <div class="mw-heading mw-heading2"><h2 id="Mark_III">Mark III</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=6" title="Edit section: Mark III"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Richard Keinath, the original Mark II and IV design engineer stated that the MK III was a regular MK II design with a larger bore, but the <a href="/wiki/Tonawanda_Engine" title="Tonawanda Engine">Tonawanda plant</a> didn't want to cast a block with a bore that large. The rumor that Packard's V8-engine tooling and production rights were considered for purchase by Chevrolet, was evidently true but never came to fruition.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Mark_III_24-0" class="reference"><a href="#cite_note-Mark_III-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> </p><p>The Mark III was supposed to be a Mark II with bigger bore centers, but it never left the drawing board due to high tooling costs.<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Mark_IV">Mark IV</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=7" title="Edit section: Mark IV"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Mark IV differed from the W-series engine in the placement of the valves and the shape of the combustion chambers. The chamber-in-block design of the W-series engine (which caused the power curve to drastically dip above 6500 rpm), was replaced by a more conventional wedge chamber in the cylinder head, which was now attached to a conventional 90 degree deck. The valves continued to use the displaced arrangement of the W-series engine, but were also inclined so that they would open away from the combustion chamber and cylinder walls, a design feature made possible by Chevrolet's stud mounted rocker arms. This alteration in valve placement resulted in a significant improvement in <a href="/wiki/Volumetric_efficiency" title="Volumetric efficiency">volumetric efficiency</a> at high RPM and a substantial increase in power output at racing speeds. Owing to the appearance of the compound angularity of the valves, the automotive press dubbed the engine the "porcupine" design.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> </p><p>As part of the head redesign, the spark plugs were relocated so that they entered the combustion chamber at an angle relative to the cylinder centerline, rather than the straight-in relationship of the W-series engine. This too helped high RPM performance. Due to the new spark plug angle, the clearance provided by the distinctive scalloped valve covers of the W-series was no longer needed, and wide, rectangular covers were used. </p><p>In all forms (except the aluminum ZL-1), the Mark IV was slightly heavier than the W-series model, with a dry weight of about 685 lb (311 kg). Aside from the new cylinder head design and the reversion to a conventional 90 degree cylinder head deck angle, the Mark IV shared many dimensional and mechanical design features with the W-series engine. The cylinder block, although more substantial in all respects, used the same cylinder <a href="/wiki/Bore_spacing" class="mw-redirect" title="Bore spacing">bore spacing</a> of 4.84 in (123 mm) with a larger 2.75 in (70 mm) main bearing dimension, increased from the 2.5 in (63.5 mm) of the older engine. Like its predecessor, the Mark IV used crowned pistons, which were <a href="/wiki/Casting_(metalworking)" class="mw-redirect" title="Casting (metalworking)">castings</a> for conventional models and impact extruded (<a href="/wiki/Forge" title="Forge">forged</a>), solid skirt types in high performance applications. </p><p>Also retained from the W-series design were the race-proven Moraine M400 aluminum bearings first used in the 409, and the highly efficient "side oiling" lubrication system, which assured maximum oil flow to the main and connecting rod bearings at all times. Later blocks intended for performance use had the main oil gallery moved up to the cam bearing bore area and provided "priority main" oiling, improving the oil system even further. </p> <div class="mw-heading mw-heading3"><h3 id="366">366</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=8" title="Edit section: 366"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The 366 cu in (6.0 L) big-block V-8 gasoline engine was used in Chevrolet medium duty trucks and school buses. It had a bore and a stroke of 3.935 in × 3.76 in (99.9 mm × 95.5 mm). This engine was made from the 1960s until 2004.The 366 used 4 rings on the pistons, as it was designed from the very beginning as a truck engine. The 366 was produced only as a tall-deck engine, with a deck 0.4 in (10 mm) taller than the 396, 402, and 454 short-deck big-blocks. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:396l78.jpg" class="mw-file-description"><img alt="1966 L78 375 Horspower 396 cubic inch engine" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bf/396l78.jpg/220px-396l78.jpg" decoding="async" width="220" height="169" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bf/396l78.jpg/330px-396l78.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bf/396l78.jpg/440px-396l78.jpg 2x" data-file-width="7521" data-file-height="5794" /></a><figcaption>1966 L78 375 Horspower 396 cubic inch engine</figcaption></figure> <div class="mw-heading mw-heading3"><h3 id="396_and_402">396 and 402<span class="anchor" id="396"></span><span class="anchor" id="402"></span></h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=9" title="Edit section: 396 and 402"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The 396 cu in (6.5 L) V8 was introduced in the <a href="/wiki/Chevrolet_Corvette_(C2)" title="Chevrolet Corvette (C2)">1965 Corvette</a> as the <a href="/wiki/Chevrolet_L78" title="Chevrolet L78">L78</a> option and in the <a href="/wiki/Chevrolet_Chevelle#Z-16_SS_396" title="Chevrolet Chevelle">Z-16 Chevelle</a> as the L37 option. It had a bore × stroke of 4.094 in × 3.760 in (104 mm × 95.5 mm),<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> and produced 375 bhp (380 PS; 280 kW) at 5600 rpm and 415 lb⋅ft (563 N⋅m) of <a href="/wiki/Machine_torque" class="mw-redirect" title="Machine torque">torque</a> at 3600 rpm.<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> The solid lifter version was capable of being operated in the upper 6000 rpm range, and when installed in the 1965 Corvette, was factory-rated at 425 hp (317 kW). </p><p>Introduced in 1970, the 402 cu in (6.6 L) was a 396 cu in (6.5 L) bored out by 0.03 in (0.76 mm). Despite being 6 cubic inches (98 cc) larger, Chevrolet continued marketing it under the popular "396" label in the smaller cars while at the same time labeling it "Turbo-Jet 400" in the full-size cars. </p><p><b>Power rating(s) by year:</b> </p> <ul><li><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:396325hp.jpg" class="mw-file-description"><img alt="1966 325 hp 396 cubic inch engine" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/78/396325hp.jpg/220px-396325hp.jpg" decoding="async" width="220" height="142" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/78/396325hp.jpg/330px-396325hp.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/78/396325hp.jpg/440px-396325hp.jpg 2x" data-file-width="3562" data-file-height="2303" /></a><figcaption>1966 325 hp 396 cubic inch engine</figcaption></figure>1965: 325 hp (242 kW)/375 hp (280 kW)/425 hp (317 kW)</li> <li>1966: 325 hp (242 kW)/360 hp (268 kW)/375 hp (280 kW)</li> <li>1967: 325 hp (242 kW)/350 hp (261 kW)/375 hp (280 kW)</li> <li>1968: 325 hp (242 kW)/350 hp (261 kW)/375 hp (280 kW)</li> <li>1969: 265 hp (198 kW)(2bbl)/325 hp (242 kW)/350 hp (261 kW)/375 hp (280 kW)</li> <li>1970: 350 hp (261 kW)/375 hp (280 kW)</li> <li>1971: 300 hp (224 kW) SAE gross; while SAE net was 260 hp (194 kW) for dual exhaust and 206 hp (154 kW) for single exhaust</li> <li>1972: 240 hp (179 kW) SAE net for dual exhaust and 210 hp (157 kW) SAE net for single exhaust</li></ul> <p><b>Applications:</b> </p> <ul><li>1965 <a href="/wiki/Chevrolet_Corvette" title="Chevrolet Corvette">Chevrolet Corvette</a></li> <li>1965–1972 <a href="/wiki/Chevrolet_Chevelle" title="Chevrolet Chevelle">Chevrolet Chevelle</a></li> <li>1967–1972 <a href="/wiki/Chevrolet_Camaro" title="Chevrolet Camaro">Chevrolet Camaro</a></li> <li>1968–1970 <a href="/wiki/Chevrolet_Chevy_II_/_Nova#Third_generation_(1968–1974)" title="Chevrolet Chevy II / Nova">Chevrolet Nova</a></li> <li>1970–1972 <a href="/wiki/Chevrolet_Monte_Carlo" title="Chevrolet Monte Carlo">Chevrolet Monte Carlo</a>, <a href="/wiki/Chevrolet_El_Camino" title="Chevrolet El Camino">Chevrolet El Camino</a>, GMC Sprint, Chevrolet trucks</li> <li>1965–1972 <a href="/wiki/Chevrolet_Biscayne" title="Chevrolet Biscayne">Chevrolet Biscayne</a>, <a href="/wiki/Chevrolet_Bel_Air" title="Chevrolet Bel Air">Chevrolet Bel Air</a>, <a href="/wiki/Chevrolet_Impala" title="Chevrolet Impala">Chevrolet Impala</a>, <a href="/wiki/Chevrolet_Impala" title="Chevrolet Impala">Chevrolet Impala SS</a>, <a href="/wiki/Chevrolet_Caprice" title="Chevrolet Caprice">Chevrolet Caprice</a></li></ul> <p><b>396 and 402 production codes:</b> </p> <dl><dd><b>396</b></dd></dl> <ul><li>L-34: produced 1966–69, 10.25:1 compression, Holley (<a href="/wiki/Quadrajet" title="Quadrajet">Q-jet</a> 1968–1969) carburetor, hydraulic lifters, oval port closed chamber <a href="/wiki/Cylinder_head" title="Cylinder head">heads</a>, forged steel crankshaft, and two-bolt main caps. It produced 350 to 360 hp (261 to 268 kW).<sup id="cite_ref-Muscle_Cars_Magazine_p.62_30-0" class="reference"><a href="#cite_note-Muscle_Cars_Magazine_p.62-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup></li> <li>L-35: produced 1965–69, 10.25:1 compression, Q-jet carburetor, forged steel (1965–67) or nodular iron (1968–69) crankshaft, hydraulic lifters, oval port closed chamber heads, and two-bolt main caps. It produced 325 hp (242 kW).<sup id="cite_ref-Muscle_Cars_Magazine_p.62_30-1" class="reference"><a href="#cite_note-Muscle_Cars_Magazine_p.62-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup></li> <li>L-37: produced 1965, similar to L-78 except for having hydraulic lifters and slightly milder cam; 2-bolt main caps; designed specifically for the 1965 <a href="/wiki/Chevrolet_Chevelle#Z-16_SS_396" title="Chevrolet Chevelle">Z-16 Chevelle</a></li> <li>L-66: produced 1969, rare two-barrel carburetor, 9:1 compression, nodular iron crankshaft, hydraulic lifters, oval port closed chamber heads, and two-bolt main caps. It produced 265 hp (198 kW).<sup id="cite_ref-Muscle_Cars_Magazine_p.62_30-2" class="reference"><a href="#cite_note-Muscle_Cars_Magazine_p.62-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup></li> <li>L-78: produced 1965–69, had a <a href="/wiki/Holley_Performance_Products" title="Holley Performance Products">Holley</a> 800 cu ft/min (23 m<sup>3</sup>/min) <a href="/wiki/Carburetor" title="Carburetor">carburetor</a>, <a href="/wiki/Compression_ratio" title="Compression ratio">compression ratio</a> 11:1, forged pop-top pistons, aluminum high-rise intake manifold, steel <a href="/wiki/Crankshaft" title="Crankshaft">crankshaft</a>, solid lifter cam (same as the L-72), rectangular ("square") port closed chamber heads, and four-bolt main caps. It produced 375 bhp (280 kW) in mid-size cars, 425 bhp (317 kW) in <a href="/wiki/Chevrolet_Corvette" title="Chevrolet Corvette">Corvettes</a>.<sup id="cite_ref-Muscle_Cars_Magazine_p.62_30-3" class="reference"><a href="#cite_note-Muscle_Cars_Magazine_p.62-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup></li></ul> <dl><dd><b>402</b></dd></dl> <ul><li>LS-3: produced 1970–72, 10.25:1 (1970) or 8.5:1 (1971) compression, hydraulic lifters, nodular iron crankshaft, and two-bolt main caps. It produced 330 hp (246 kW) (1970), 300 hp (224 kW) (1971), 210 or 240 hp (157 or 179 kW) (1972 net horsepower, single or dual exhaust).<sup id="cite_ref-Muscle_Cars_Magazine_p.62_30-4" class="reference"><a href="#cite_note-Muscle_Cars_Magazine_p.62-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup></li> <li>L-34: produced 1970. Same as 396 cu in (6.5 L) L-34 from 1967 to 1969.</li> <li>L-78: produced 1970. Same as 396 cu in (6.5 L) L-78 from 1966 to 1969.</li></ul> <div class="mw-heading mw-heading3"><h3 id="427">427</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=10" title="Edit section: 427"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table border="0" style="float:right;"> <tbody><tr> <td><figure typeof="mw:File/Thumb"><a href="/wiki/File:1966_Chevrolet_Corvette_427_engine.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5b/1966_Chevrolet_Corvette_427_engine.JPG/150px-1966_Chevrolet_Corvette_427_engine.JPG" decoding="async" width="150" height="113" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5b/1966_Chevrolet_Corvette_427_engine.JPG/225px-1966_Chevrolet_Corvette_427_engine.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5b/1966_Chevrolet_Corvette_427_engine.JPG/300px-1966_Chevrolet_Corvette_427_engine.JPG 2x" data-file-width="800" data-file-height="600" /></a><figcaption>L36 427 in a 1966 <a href="/wiki/Chevrolet_Corvette" title="Chevrolet Corvette">Chevrolet Corvette</a></figcaption></figure> </td></tr> <tr> <td><figure typeof="mw:File/Thumb"><a href="/wiki/File:SC06_1967_Chevrolet_Corvette_427_L89_engine.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/SC06_1967_Chevrolet_Corvette_427_L89_engine.jpg/150px-SC06_1967_Chevrolet_Corvette_427_L89_engine.jpg" decoding="async" width="150" height="113" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/SC06_1967_Chevrolet_Corvette_427_L89_engine.jpg/225px-SC06_1967_Chevrolet_Corvette_427_L89_engine.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/27/SC06_1967_Chevrolet_Corvette_427_L89_engine.jpg/300px-SC06_1967_Chevrolet_Corvette_427_L89_engine.jpg 2x" data-file-width="1024" data-file-height="768" /></a><figcaption>L71 427 in a 1967 <a href="/wiki/Chevrolet_Corvette" title="Chevrolet Corvette">Chevrolet Corvette</a></figcaption></figure> </td></tr></tbody></table> <p>The highly successful and versatile 427 cu in (7.0 L) version of the Mark IV engine was introduced in 1966 as a production engine option for full-sized Chevrolets and Corvettes. The bore was increased to <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">4<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">4</span></span> in (108 mm), with power ratings varying widely depending on the application. There were smooth running versions with <a href="/wiki/Hydraulic_lifters" class="mw-redirect" title="Hydraulic lifters">hydraulic lifters</a> suitable for powering the family <a href="/wiki/Station_wagon" title="Station wagon">station wagon</a>, as well as rough-idling, high-revving solid lifter models usually applied to a minimally equipped, plain-looking, two-door <a href="/wiki/Chevrolet_Biscayne" title="Chevrolet Biscayne">Biscayne</a> <a href="/wiki/Sedan_(car)" class="mw-redirect" title="Sedan (car)">sedan</a> fitted with the 425 hp (317 kW) version of the 427 (RPO <a href="/wiki/Chevrolet_L72" title="Chevrolet L72">L72</a>). </p><p>Perhaps the ultimate 427 for street applications was the 435 bhp (441 PS; 324 kW) at 5800 rpm and 460 lb⋅ft (624 N⋅m) at 4000 rpm of torque <a href="/wiki/Chevrolet_L72#L71" title="Chevrolet L72">L71</a> version available in 1967 to 1969 Corvettes, and in the Italian <a href="/wiki/Iso_Grifo" title="Iso Grifo">Iso Grifo</a>. This engine was identical to the 425 hp (317 kW) L72 427 (first introduced in 1966), but was fitted with 3×2-barrel <a href="/wiki/Holley_Performance_Products" title="Holley Performance Products">Holley</a> <a href="/wiki/Carburetor" title="Carburetor">carburetors</a>,<sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> known as "<a href="/wiki/Tri-Power" title="Tri-Power">Tri-Power</a>," in lieu of the L72's single 4-barrel carburetor. Both engines used the same high-lift, long-duration, high-overlap camshaft and large-port, cast-iron heads to maximize cylinder head airflow (and, hence, engine power) at elevated engine-operating speeds. Consequently, the engines offered very similar performance and resulted in a car whose performance was described by one automotive journalist as "the ultimate in sheer neck-snapping overkill". Typical 2000s-era magazine road tests of Corvettes with the engine yielded 0-60 mph (97 km/h) in 5.6 seconds and <a href="/wiki/Dragstrip" title="Dragstrip"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac"><span class="num">1</span>⁄<span class="den">4</span></span> mile (402 m)</a> in 13.8 second at 104 mph (167 km/h) range for both the L72 and L71.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> </p><p>In 2011, <i>Super Chevy Magazine</i> conducted a chassis <a href="/wiki/Dynamometer" title="Dynamometer">dynamometer</a> test of a well documented, production-line, stock but well-tuned L-72 "COPO" Camaro, and recorded a peak 287 hp (214 kW) at the rear wheels, demonstrating the substantial difference between 1960s-era SAE "gross" horsepower ratings and horsepower at the wheels on a chassis dynamometer. Wheel horsepower (which is obtained at the drive wheels and thus takes into account drivetrain power loss of the transmission, driveshaft, and differential, as well as all accessories) does not equate to <a href="/wiki/Horsepower#SAE_net_power" title="Horsepower">SAE net HP</a> (which is horsepower at the flywheel, but with all essential peripherals included (such as the water pump, alternator, and air cleaner), accessories (such as a power steering pump, if fitted), a stock exhaust system, and all required emission controls, none of which are accounted for in SAE gross, which only measures gross flywheel horsepower).<sup id="cite_ref-superchevy1_34-0" class="reference"><a href="#cite_note-superchevy1-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> </p><p>The RPO L89 was an L71 fitted with aluminum heads. While this option produced no power advantage, it did reduce engine (and hence, vehicle) weight by roughly 75 pounds (34 kg).<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (May 2024)">citation needed</span></a></i>]</sup> Although the difference in straight line performance was negligible, the weight savings resulted in superior vehicle weight distribution and improved handling and braking. </p> <div class="mw-heading mw-heading4"><h4 id="ZL1">ZL1</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=11" title="Edit section: ZL1"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The all-aluminum 1969 ZL1 version of the 427 engine was developed primarily for <a href="/wiki/Can-Am" title="Can-Am">Can-Am</a> racing,<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (May 2024)">citation needed</span></a></i>]</sup> which did not require homologation to compete,; it was very successful in cars like the <a href="/wiki/McLaren_M8A" title="McLaren M8A">McLaren M8B</a>. The ZL1 specifications were nearly identical to the production L88 version of the 427, but featured an aluminum block in addition to aluminum cylinder heads. The first Corvette with the RPO ZL1 engine package was built in early December 1968 and featured aluminum closed chamber heads shared with the L88. Both L88 and ZL1 optioned cars continued to be built with closed chamber heads until approximately March 1969, when the open combustion chamber aluminum heads finally were in production and began being fitted to the L88 and ZL1 engines. The ZL1 engine also featured a lightweight aluminum water pump, a camshaft that was slightly "hotter" than the L88's, and a specially tuned aluminum intake manifold. Like the L88, the ZL1 required 103 <a href="/wiki/Octane_rating" title="Octane rating">octane (RON)</a> (minimum) fuel (102 octane RON [Sunoco 260] represented the highest octane gasoline sold at common retail stations), used an unshrouded radiator, and had poor low-speed idle qualities – all of which made the two engines largely unsuitable for street use. </p><p>As impressive as the ZL1 was in its day, actual engine dyno tests of a certified production line stock ZL1 revealed 376 hp (280 kW) SAE net with rated output swelling to 524 hp (391 kW) <a href="/wiki/Horsepower#SAE_gross_power" title="Horsepower">SAE gross</a> with the help of optimal carb and ignition tuning, open long tube racing headers, and with no power-sapping engine accessories or air cleaner in place.<sup id="cite_ref-CRG-COPO427_35-0" class="reference"><a href="#cite_note-CRG-COPO427-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> A second engine dyno test conducted on a second production line stock (but recently rebuilt and partially blueprinted) ZL1 revealed nearly identical figures for the various "gross" conditions.<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> </p><p>Period magazine tests of the ZL1 were quite rare due to the rarity of the engine itself. <i>High-Performance Cars</i> tested a production line stock, but well tuned, example and recorded a 13.1 second/110 mph (180 km/h) <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac"><span class="num">1</span>⁄<span class="den">4</span></span> mile (402 m), which correlates quite well with the previously referenced 376 hp (280 kW) SAE Net figure. <i>Super Stock and Drag Racing Magazine</i> recorded an 11.62 second/122.15 mph (196.58 km/h) <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac"><span class="num">1</span>⁄<span class="den">4</span></span> mile (402 m) in a professionally tuned ZL1 Camaro with open long-tube S&S equal-length headers, drag slicks, and minor suspension modifications, driven by drag racing legend Dick Harrell. Using Patrick Hale's Power/Speed formula, the 122.15 mph (196.58 km/h) trap speed indicated low 11-second ET (elapsed time) potential (e.g. with larger drag slicks) and suggested something on the order of 495 hp (369 kW), "as installed", in that modified configuration. This large difference in power suggests that the <a href="/wiki/Original_equipment_manufacturer" title="Original equipment manufacturer">OEM</a> exhaust manifolds and exhaust system were highly restrictive in the ZL1 application, as was also the case with the similar L88. </p><p>The then-staggering $4,718 cost of the ZL1 option doubled the price of the 1969 Corvette, resulting in just two production Corvettes (factory option at dealer) and 69 1969 Camaros (non-dealer option from factory – COPO 9560) being built with the ZL1. </p><p>Chevrolet capitalized on the versatility of the 427 design by producing a wide variety of high-performance, "over-the-counter" engine components as well as ready-to-race <a href="/wiki/Automobile_engine_replacement" title="Automobile engine replacement">"replacement" engines</a> in shipping crates. Some of the components were developed to enhance the engine's reliability during high RPM operation, possibly justifying the use of the description "heavy duty." However, most of these items were racing parts originally designed for Can-Am competition that found their way onto dealers' shelves, and were meant to boost the engine's power output. </p><p>Beginning in 1969, the highest performance 427 models were fitted with the new open (vs. closed) chamber cylinder heads, along with design improvements in crankshafts, connecting rods, and pistons, adopted from the Can-Am development program. </p><p>Chevrolet gave all 427 engines except the ZL1 a torque rating of 460 lb⋅ft (624 N⋅m). </p> <div class="mw-heading mw-heading4"><h4 id="Mark_IV_427_performance_specifications">Mark IV 427 performance specifications</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=12" title="Edit section: Mark IV 427 performance specifications"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable"> <tbody><tr> <th>First<br />Year </th> <th>Last<br />Year </th> <th>Engine<br />Code </th> <th>Features </th> <th>Compression<br />ratio </th> <th>Factory<br />Gross Power<br />Rating </th></tr> <tr> <td>1966</td> <td>1969</td> <td>L36</td> <td>4-barrel</td> <td>10.25:1</td> <td>390 hp (291 kW) </td></tr> <tr> <td>1966</td> <td>1969</td> <td>L72</td> <td>4-barrel + solid-lifters, more aggressive cam and high flow cylinder heads</td> <td>11.00:1</td> <td>425 hp (317 kW)<sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td>1967</td> <td>1969</td> <td>L68</td> <td>L36 with 3×2-barrel carbs.</td> <td>10.25:1</td> <td>400 hp (298 kW) </td></tr> <tr> <td>1967</td> <td>1969</td> <td>L71</td> <td>L72 with 3×2 barrel carbs.</td> <td>11.00:1</td> <td>435 hp (324 kW) </td></tr> <tr> <td>1967</td> <td>1969</td> <td>L89</td> <td>L71 + aluminum heads; RPO L89 also applied to L78 "375 HP" 396 engine with aluminum head option.</td> <td>11.00:1</td> <td>435 hp (324 kW) </td></tr> <tr> <td>1967</td> <td>1969</td> <td>L88</td> <td>Racing-spec cam, high-flow aluminum heads (casting #s varied by model year) and some upgraded, competition-grade parts</td> <td>12.50:1<sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">[</span>b<span class="cite-bracket">]</span></a></sup></td> <td>430 hp (321 kW)<sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">[</span>c<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td>1969</td> <td>1969</td> <td>ZL1</td> <td>Aluminum block with open chamber "3946074" aluminum heads (the early Corvette RPO engine featured a closed chamber head); cam even "hotter" than L88's; upgraded parts similar to L88's</td> <td>12.00:1</td> <td>430 hp (321 kW) </td></tr></tbody></table> <p><b>Applications:</b> </p> <ul><li>1966–1969 <a href="/wiki/Chevrolet_Biscayne" title="Chevrolet Biscayne">Chevrolet Biscayne</a></li> <li>1966–1969 <a href="/wiki/Chevrolet_Caprice" title="Chevrolet Caprice">Chevrolet Caprice</a></li> <li>1966–1969 <a href="/wiki/Chevrolet_Impala" title="Chevrolet Impala">Chevrolet Impala</a></li> <li>1966–1969 <a href="/wiki/Chevrolet_Corvette" title="Chevrolet Corvette">Chevrolet Corvette</a></li> <li>1968–1969 <a href="/wiki/Chevrolet_Camaro" title="Chevrolet Camaro">Chevrolet Camaro</a> (most were dealer installed, but in 1969 both the L-72 and the ZL-1 were factory options)</li></ul> <p><b>427 production codes:</b> </p> <ul><li>LS-1: produced 1969, 10.25:1 compression, Q-jet carburetor, oval port closed chamber heads, hydraulic lifters, nodular iron crankshaft, and two-bolt main caps. It produced 335 hp (250 kW).<sup id="cite_ref-Muscle_Cars_Magazine_p.63_40-0" class="reference"><a href="#cite_note-Muscle_Cars_Magazine_p.63-40"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup></li> <li>L-36: produced 1966–69, 10.25:1 compression, Holley or Q-jet carburetor, nodular iron crankshaft, hydraulic lifters, oval port closed chamber heads, and two-bolt main caps. It produced 385 hp (287 kW) in 1967–68 full-size cars, 390 hp (291 kW) in 1969 full-size cars and Corvettes (by exhaust system).<sup id="cite_ref-Muscle_Cars_Magazine_p.63_40-1" class="reference"><a href="#cite_note-Muscle_Cars_Magazine_p.63-40"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup></li> <li>L-68: produced 1967–69, 10.25:1 compression, <a href="/wiki/Pontiac_V8_engine#347" title="Pontiac V8 engine">Tri-Power</a>, nodular iron crankshaft, hydraulic lifters, aluminum oval port closed chamber heads, and two-bolt main caps. It produced 400 hp (298 kW), and was used in Corvettes.<sup id="cite_ref-Muscle_Cars_Magazine_p.63_40-2" class="reference"><a href="#cite_note-Muscle_Cars_Magazine_p.63-40"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading3"><h3 id="454">454</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=13" title="Edit section: 454"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:2014_Rolling_Sculpture_Car_Show_47_(1970_Chevrolet_Chevelle_SS_454_engine).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg/220px-2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c1/2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg/330px-2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c1/2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg/440px-2014_Rolling_Sculpture_Car_Show_47_%281970_Chevrolet_Chevelle_SS_454_engine%29.jpg 2x" data-file-width="3072" data-file-height="2304" /></a><figcaption>454 in a 1970 Chevelle SS</figcaption></figure> <p>For 1970, the big-block was expanded again, to 454 cu in (7.4 L), with a <a href="/wiki/Bore_(engine)" title="Bore (engine)">bore</a> × <a href="/wiki/Stroke_(engine)" title="Stroke (engine)">stroke</a> of <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">4<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">4</span></span> in × 4 in (108.0 mm × 101.6 mm). The 1970 <a href="/wiki/Chevrolet_Corvette" title="Chevrolet Corvette">Chevrolet Corvette</a> LS-5 version of this engine was factory-rated at 390 bhp (395 PS; 291 kW) and 500 lb⋅ft (678 N⋅m), and the LS-6 engine equipped with a single 4-barrel 800 cu ft/min (23 m<sup>3</sup>/min) <a href="/wiki/Holley_Performance_Products" title="Holley Performance Products">Holley</a> <a href="/wiki/Carburetor" title="Carburetor">carburetor</a> was upgraded to 450 bhp (456 PS; 336 kW) at 5600 rpm and 500 lb⋅ft (678 N⋅m) at 3600 rpm of <a href="/wiki/Machine_torque" class="mw-redirect" title="Machine torque">torque</a>.<sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-42" class="reference"><a href="#cite_note-42"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup> </p><p>The AHRA ASA (Showroom Stock Automatic) Class record-holding Chevelle LS-6 for the 1970 racing season posted a best-of-season trap speed of 106.76 mph (172 km/h),<sup id="cite_ref-Chevelle454_43-0" class="reference"><a href="#cite_note-Chevelle454-43"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup> which suggests something on the order of 350 "as installed" (SAE Net) HP for a 3,900 pounds (1,769 kg) car-and-driver combination.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (October 2021)">citation needed</span></a></i>]</sup> Indeed, <i>Super Chevy Magazine</i> conducted a chassis dyno test of a well-documented, well tuned, but stock 1970 LS-6 Chevelle and recorded 283 peak HP at the wheels<sup id="cite_ref-superchevy1_34-1" class="reference"><a href="#cite_note-superchevy1-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> – a figure that lines up quite well with the previously referenced 350 SAE Net HP figure.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (October 2021)">citation needed</span></a></i>]</sup> </p><p>An even more powerful version, producing 465 hp (347 kW) and 610 lb⋅ft (827 N⋅m), of the 454, then dubbed LS-7 (not to be confused with the modern, mid 2000s, 7-litre <a href="/wiki/Chevrolet_Corvette" title="Chevrolet Corvette">Chevrolet Corvette</a> engine that powered the <a href="/wiki/Chevrolet_Corvette_C6" class="mw-redirect" title="Chevrolet Corvette C6">C6</a> Z06, which is an LS7). Several LS-7 intake manifolds were individually produced and sold to the general public by a few Chevrolet dealers as optional performance parts. The LS-7 was later offered as a <a href="/wiki/Automobile_engine_replacement" title="Automobile engine replacement">crate engine</a> from Chevrolet Performance with an officially rated power minimum of 500 hp (373 kW) gross. </p><p>In 1971, the LS-5 produced 365 hp (272 kW) and 550 lb⋅ft (746 N⋅m), and the LS-6 option came in at 425 hp (317 kW) and 575 lb⋅ft (780 N⋅m). In 1972, only the LS-5 remained, when SAE net power ratings and the move towards emission compliance resulted in a temporary output decline, due to lowered compression, to about 270 hp (201 kW) and 468 lb⋅ft (635 N⋅m). The 1973 LS-4 produced 275 hp (205 kW) and 468 lb⋅ft (635 N⋅m), with 5 hp (4 kW) and 10 lb⋅ft (14 N⋅m) gone the following year. Hardened valve seats further increased reliability and helped allow these engines to last much longer than the earlier versions, even without the protection previously provided by <a href="/wiki/Tetraethyllead" title="Tetraethyllead">leaded fuel</a>. 1974 was the last year of the 454 in the Corvette, although the Chevelle offered it in the first half of the 1975 model year. It was also available in the full size Impala/Caprice through model year 1976. </p> <ul><li>1970–1976 <a href="/wiki/Chevrolet_Caprice" title="Chevrolet Caprice">Chevrolet Caprice</a></li> <li>1970–1975 <a href="/wiki/Chevrolet_Chevelle#1970_Chevrolet_Chevelle" title="Chevrolet Chevelle">Chevrolet Chevelle</a></li> <li>1970–1975 <a href="/wiki/Chevrolet_Monte_Carlo" title="Chevrolet Monte Carlo">Chevrolet Monte Carlo</a></li> <li>1970–1975 <a href="/wiki/Chevrolet_El_Camino" title="Chevrolet El Camino">Chevrolet El Camino</a></li> <li>1971–1975 <a href="/wiki/GMC_Sprint" class="mw-redirect" title="GMC Sprint">GMC Sprint</a></li> <li>1970–1974 <a href="/wiki/Chevrolet_Corvette" title="Chevrolet Corvette">Chevrolet Corvette</a></li></ul> <div class="mw-heading mw-heading3"><h3 id="L19">L19</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=14" title="Edit section: L19"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>General Motors introduced EFI in 1987, which was found on GM C1500 SS, C/K2500, and C/K3500 trucks. The 454 EFI version was rated from 230 hp (172 kW) to 255 hp (190 kW) and from 385 lb⋅ft (522 N⋅m) to 405 lb⋅ft (549 N⋅m) of torque. The 1991–1993 454SS made 255 horsepower at 4000 rpm and 405 lb-ft of torque at 2400 rpm thanks to dual 2.5" catalytic converters. All other versions, including the 1990 SS, made 230 horsepower at 3600 rpm and 385 lb-ft of torque at 1600 rpm through a single 3" catalytic converter. </p> <ul><li>1987–1990 Chevrolet R2500 and R/V3500</li> <li>1985–1990 <a href="/wiki/Chevrolet_C/K" title="Chevrolet C/K">Chevrolet C/K</a></li> <li>1989–1990 <a href="/wiki/Chevrolet_van" title="Chevrolet van">Chevrolet/GMC 3500 van</a></li></ul> <div class="mw-heading mw-heading3"><h3 id="Commercial_applications">Commercial applications</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=15" title="Edit section: Commercial applications"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Mark IV engines saw extensive application in Chevrolet and GMC medium duty trucks, as well as in <a href="/wiki/Blue_Bird_Corporation" title="Blue Bird Corporation">Blue Bird Corporation</a>'s <a href="/wiki/Blue_Bird_All_American" title="Blue Bird All American">All American</a> and <a href="/wiki/TC/2000" class="mw-redirect" title="TC/2000">TC/2000</a> transit buses (the latter up until 1995, using a 427 with purpose-built carburetor). In addition to the 427, a 366 cu in (6.0 L) version was produced for the commercial market. Both the 366 and 427 commercial versions were built with a raised-deck, four-bolt main bearing cap cylinder to accommodate an extra oil control ring on the pistons. Unfortunately, the raised deck design complicated the use of the block in racing applications, as standard intake manifolds required spacers for proper fit. Distributors with adjustable collars that allowed adjustments to the length of the distributor shaft also had to be used with 366 and 427 truck blocks. </p><p>Mark IV engines also found themselves widely used in power boats. Many of these engines were ordinary Chevrolet production models that were fitted with the necessary accessories and drive system to adapt them to marine propulsion. <a href="/wiki/Mercury_Marine" title="Mercury Marine">Mercury Marine</a>, in particular, was a major user of the Mark IV in marine drives, and relabeled the engines with their corporate logo. </p> <div class="mw-heading mw-heading2"><h2 id="Generation_V">Generation V</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=16" title="Edit section: Generation V"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>For 1991, <a href="/wiki/General_Motors" title="General Motors">General Motors</a> made significant changes to the big-block resulting in the Generation V. The block received a one-piece rear seal and all blocks received 4-bolt mains. Additionally the main oil galley was moved from near the oil pan to near the camshaft. Also the <a href="/wiki/Valvetrain" title="Valvetrain">valvetrain</a> became non-adjustable and the provisions for a mechanical fuel pump were eliminated. Cast aluminum valve covers were fitted in place of stamped steel covers, featuring a screw-in filler cap.<sup id="cite_ref-44" class="reference"><a href="#cite_note-44"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup> Structural changes were carried out to the <span class="clarify-content" style="padding-left:0.1em; padding-right:0.1em; color:var(--color-subtle, #54595d); border:1px solid var(--border-color-subtle, #c8ccd1);">cylinder case</span><sup class="noprint Inline-Template Template-Clarify" style="margin-left:0.1em; white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="What is a "cylinder case"? This is an unknown term to American readers. A familiar one (in an article on an American engine) should be substituted. (May 2024)">clarify</span></a></i>]</sup> to improve the integrity of the bores and the inlet manifold was changed to a single-piece design.<sup id="cite_ref-JM2_45-0" class="reference"><a href="#cite_note-JM2-45"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="6.0_(L50)"><span id="6.0_.28L50.29"></span>6.0 (L50)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=17" title="Edit section: 6.0 (L50)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The 366 cu in (6.0 L) truck engine also received the Mark V updates for 1991.<sup id="cite_ref-JM2_45-1" class="reference"><a href="#cite_note-JM2-45"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="L19_2">L19</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=18" title="Edit section: L19"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>From 1991, the 454 was updated to the new Gen V block, crankshaft and heads. This engine was rated at 230 net hp, 380 lb-ft net torque, and was discontinued after 1995, with GM coming out with the Vortec 7400 in 1996. </p> <div class="mw-heading mw-heading3"><h3 id="502">502</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=19" title="Edit section: 502"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Chevy502CID.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/Chevy502CID.jpg/200px-Chevy502CID.jpg" decoding="async" width="200" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/Chevy502CID.jpg/300px-Chevy502CID.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/58/Chevy502CID.jpg/400px-Chevy502CID.jpg 2x" data-file-width="2000" data-file-height="1500" /></a><figcaption>The Chevrolet 502 V8</figcaption></figure> <p>The 502—with a 501.28 cu in (8.2 L) total displacement—had a bore and stroke of 4.466 in × 4 in (113.4 mm × 101.6 mm) and a cast iron 4-bolt main block. GM offered it in their Performance Parts catalog, available as multiple <a href="/wiki/Crate_motor" class="mw-redirect" title="Crate motor">crate motors</a> with horsepower ratings from 338 to 600 hp (252 to 447 kW) and torque of 470 to 567 lb⋅ft (637 to 769 N⋅m) in "Base" and "Deluxe" packages.<sup id="cite_ref-46" class="reference"><a href="#cite_note-46"><span class="cite-bracket">[</span>43<span class="cite-bracket">]</span></a></sup> The "Ram Jet 502,"<sup id="cite_ref-47" class="reference"><a href="#cite_note-47"><span class="cite-bracket">[</span>44<span class="cite-bracket">]</span></a></sup> the 496 hp (370 kW) / 565 lb⋅ft (766 N⋅m) crate motor, was offered with <a href="/wiki/Fuel_injection" title="Fuel injection">fuel injection</a>, and came as a <a href="/wiki/Turn_key" class="mw-redirect" title="Turn key">turn key</a> setup which included all the wiring and electronics needed to operate in any vehicle. It was also used in marine applications. </p> <div class="mw-heading mw-heading3"><h3 id="ZZ572">ZZ572</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=20" title="Edit section: ZZ572"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>General Motors began offering a newly developed 572 cu in (9.4 L) in 1998<sup id="cite_ref-48" class="reference"><a href="#cite_note-48"><span class="cite-bracket">[</span>45<span class="cite-bracket">]</span></a></sup> to the aftermarket via its GM Performance Parts division. This engine has a bore and a stroke of <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">4.56 in × <span class="frac">4<span class="sr-only">+</span><span class="num">3</span>⁄<span class="den">8</span></span> in (115.8 mm × 111.1 mm). This is a 620 hp (462 kW) and 650 lb⋅ft (881 N⋅m) version, designated ZZ572/620 Deluxe, capable of running on 92 octane pump gasoline for street applications.<sup id="cite_ref-49" class="reference"><a href="#cite_note-49"><span class="cite-bracket">[</span>46<span class="cite-bracket">]</span></a></sup> Another version of the same engine is available as a high compression variant, codenamed ZZ572/720R Deluxe, generating a minimum of 720 hp (537 kW) on high-octane racing fuel.<sup id="cite_ref-50" class="reference"><a href="#cite_note-50"><span class="cite-bracket">[</span>47<span class="cite-bracket">]</span></a></sup> The 572 is officially offered by Chevrolet for the 2022 model year COPO Camaro.<sup id="cite_ref-51" class="reference"><a href="#cite_note-51"><span class="cite-bracket">[</span>48<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-52" class="reference"><a href="#cite_note-52"><span class="cite-bracket">[</span>49<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-53" class="reference"><a href="#cite_note-53"><span class="cite-bracket">[</span>50<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="ZZ632">ZZ632</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=21" title="Edit section: ZZ632"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 2021, <a href="/wiki/Chevrolet_Performance" title="Chevrolet Performance">Chevrolet Performance</a> presented the largest and most powerful crate engine in the brand's history—the ZZ632/1000 crate engine. It is a <a href="/wiki/Naturally-aspirated" class="mw-redirect" title="Naturally-aspirated">naturally-aspirated</a>, 632 cu in (10.4 L) V8, producing 1,004 <a href="/wiki/Horsepower" title="Horsepower">hp</a> (749 <a href="/wiki/Kilowatt" class="mw-redirect" title="Kilowatt">kW</a>) and 876 <a href="/wiki/Pound-foot_(torque)" title="Pound-foot (torque)">lb⋅ft</a> (1,188 <a href="/wiki/Newton-metre" title="Newton-metre">N⋅m</a>) of torque.<sup id="cite_ref-54" class="reference"><a href="#cite_note-54"><span class="cite-bracket">[</span>51<span class="cite-bracket">]</span></a></sup> The motor itself weighs 680 lb (310 kg).<sup id="cite_ref-55" class="reference"><a href="#cite_note-55"><span class="cite-bracket">[</span>52<span class="cite-bracket">]</span></a></sup> </p><p>According to Russ O'Blenes, the GM director of the Performance and Racing Propulsion Team, the ZZ632 is the "biggest, baddest crate engine we've ever built. [It] sits at the top of our unparalleled crate engine lineup as the king of performance. It delivers incredible power, and it does it on pump gas."<sup id="cite_ref-56" class="reference"><a href="#cite_note-56"><span class="cite-bracket">[</span>53<span class="cite-bracket">]</span></a></sup> </p><p>The big-block V8 reaches peak power at 6,600 rpm, and revs to a recommended maximum of 7,000 rpm. Fuel is delivered through eight-port injectors, with the engine breathing through CNC-machined high-flow aluminum cylinder heads featuring symmetrical ports. While big-blocks have usually been designed with variations in port shape from cylinder to cylinder, all eight intake ports of the ZZ632 have the same volume, length, and layout. Furthermore, all of the ZZ632's exhaust ports are identical. This arrangement guarantees all individual cylinders produce similar power.<sup id="cite_ref-57" class="reference"><a href="#cite_note-57"><span class="cite-bracket">[</span>54<span class="cite-bracket">]</span></a></sup> </p><p>These RS-X symmetrical port cylinder heads are named for powertrain engineer Ron Sperry, who designed them as one of his final accomplishments in more than 50 years working on General Motors performance and racing engines. Sperry also introduced symmetrical ports to Chevy's iconic small-block V-8, with the Gen III <a href="/wiki/General_Motors_LS-based_small-block_engine" title="General Motors LS-based small-block engine">LS1 engine</a> that debuted in the 1997 <a href="/wiki/Chevrolet_Corvette" title="Chevrolet Corvette">Chevrolet Corvette</a>. </p><p>The ZZ632's iron block shares a mold with Chevrolet Performance's ZZ572 crate engines, but the castings are machined to accommodate the huge 632 cubic-inch displacement. The bore grows by 0.040 in (1.0 mm), compared to the 572-cubic-inch V8s, with most of the displacement gain coming from a stroke that is 0.375 in (9.5 mm) longer. To provide clearance for that long-stroke, engineers modified both the block and the connecting rods. Four-bolt main caps and a forged rotating assembly assure strength and durability. During development, a single engine endured more than 200 simulated drag strip passes on a dynamometer. </p><p>The ZZ632/1000 crate engine was slated to be on display at the November 2021 <a href="/wiki/SEMA_(association)" title="SEMA (association)">SEMA Show</a> in Las Vegas. Chevrolet Performance dealers were to begin deliveries in early 2022.<sup id="cite_ref-58" class="reference"><a href="#cite_note-58"><span class="cite-bracket">[</span>55<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Generation_VI">Generation VI</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=22" title="Edit section: Generation VI"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Vortec_7400_(L29)"><span id="Vortec_7400_.28L29.29"></span>Vortec 7400 (L29)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=23" title="Edit section: Vortec 7400 (L29)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Vortec 7400 L29 7.4 L (454 cu in) <a href="/wiki/V8_engine" title="V8 engine">V8</a> was a <a href="/wiki/Truck" title="Truck">truck</a> version of the Chevrolet big-block engine. Introduced in 1996, it was produced for five years, until replaced by the Vortec 8100. Although introduced as the Vortec 7400 in 1996, it was basically a 454 big-block with a hydraulic roller <a href="/wiki/Cam_(mechanism)" title="Cam (mechanism)">cam</a>, parts more suitable for use in <a href="/wiki/Light_truck" title="Light truck">light trucks</a>, and more advanced technology. The engine had MPFI (multi-port fuel injection), which gave slightly more power and better fuel economy, and two valves per cylinder. The engine had a bore and stroke of <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">4<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">4</span></span> in × 4 in (108.0 mm × 101.6 mm), producing 290 hp (216 kW) at 4000 rpm and 410 lb⋅ft (556 N⋅m) at 3200 rpm. </p><p>L29 applications: </p> <ul><li>1996–2000 <a href="/wiki/Chevrolet_C/K_(fourth_generation)" title="Chevrolet C/K (fourth generation)">Chevrolet C/K / GMC Sierra</a> 2500, 3500, and C3500HD (above 8,500 pounds GVWR)</li> <li>1996–1999 <a href="/wiki/Chevrolet_Suburban" title="Chevrolet Suburban">Chevrolet/GMC Suburban 2500</a></li> <li>1996–2000 <a href="/wiki/Chevrolet_Express" title="Chevrolet Express">Chevrolet Express/GMC Savana</a> 3500</li></ul> <div class="mw-heading mw-heading3"><h3 id="Vortec_7400_(L21)"><span id="Vortec_7400_.28L21.29"></span>Vortec 7400 (L21)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=24" title="Edit section: Vortec 7400 (L21)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Vortec 7400 L21 was a <a href="/wiki/Commercial_vehicle" title="Commercial vehicle">commercial</a> version of the Chevrolet big-block engine used in the <a href="/wiki/Medium_duty_truck" class="mw-redirect" title="Medium duty truck">medium duty truck</a> platform. Its design shared much with the L29 454, but with the addition of forged pistons and crankshaft, and <a href="/wiki/Distributor" title="Distributor">coil near plug ignition</a>. It had slightly reduced power compared to the L29 454 and used a different <a href="/wiki/Powertrain_control_module" title="Powertrain control module">PCM</a>. The L21 was paired with the early 4-speed <a href="/wiki/Allison_Transmission" title="Allison Transmission">Allison</a> <a href="/wiki/Automatic_transmission" title="Automatic transmission">automatic transmission</a> or <a href="/wiki/Manual_transmission" title="Manual transmission">manual transmission</a>, depending on the application. </p><p>L21 applications: </p> <ul><li>1998–2001 <a href="/wiki/Chevrolet_Kodiak" title="Chevrolet Kodiak">Chevrolet Kodiak</a>/<a href="/wiki/GMC_TopKick" class="mw-redirect" title="GMC TopKick">GMC TopKick</a>/<a href="/wiki/Isuzu_H-Series" class="mw-redirect" title="Isuzu H-Series">Isuzu H-Series</a> 4500 and 5500</li> <li>1998–2001 P12 HD Motorhome Chassis. The Workhorse W-20 is a clone of the P12 Chassis.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Generation_VII">Generation VII</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=25" title="Edit section: Generation VII"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Vortec_8100_(L18)"><span id="Vortec_8100_.28L18.29"></span><span class="anchor" id="L18"></span> Vortec 8100 (L18)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=26" title="Edit section: Vortec 8100 (L18)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Vortec 8100 L18 is a big-block <a href="/wiki/V8_engine" title="V8 engine">V8</a> engine primarily used as a <a href="/wiki/Truck" title="Truck">truck</a> engine. It was a redesigned Chevrolet big-block engine and was introduced with the 2001 <a href="/wiki/Chevrolet_Silverado" title="Chevrolet Silverado">full-size pickup trucks</a>. It is an all-iron engine (block and heads) with two valves per cylinder. It retained the 4.25 in (107.95 mm) bore diameter of the old 7.0 L (427 cu in) and 7.4 L (454 cu in) big-blocks, but the stroke was increased to 4.37 in (111.00 mm) for a total displacement of 495.95 cu in (8.1 L). Power output ranged from 210 to 340 hp (157 to 254 kW), and torque from 325 to 455 lb⋅ft (441 to 617 N⋅m).<sup id="cite_ref-59" class="reference"><a href="#cite_note-59"><span class="cite-bracket">[</span>56<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-60" class="reference"><a href="#cite_note-60"><span class="cite-bracket">[</span>57<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-61" class="reference"><a href="#cite_note-61"><span class="cite-bracket">[</span>58<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-62" class="reference"><a href="#cite_note-62"><span class="cite-bracket">[</span>59<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-63" class="reference"><a href="#cite_note-63"><span class="cite-bracket">[</span>60<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-64" class="reference"><a href="#cite_note-64"><span class="cite-bracket">[</span>61<span class="cite-bracket">]</span></a></sup> </p><p>Other important differences between the Vortec 8100 and older big-blocks include a changed firing order. The firing order of older big-block engines is 1-8-4-3-6-5-7-2<sup id="cite_ref-65" class="reference"><a href="#cite_note-65"><span class="cite-bracket">[</span>62<span class="cite-bracket">]</span></a></sup> while Vortec 8100's firing order is 1-8-7-2-6-5-4-3. Other upgrades of Vortec 8100 include a new 18-bolt head bolt pattern, longer connecting rods, different symmetrical intake ports, different oil pan rails, and the use of metric threads throughout the engine. The fuel-injection system for the Vortec 8100 is nearly identical to that used on Gen III small-block engines, right down to the fuel and spark tables in the ECU.<sup id="cite_ref-66" class="reference"><a href="#cite_note-66"><span class="cite-bracket">[</span>63<span class="cite-bracket">]</span></a></sup> </p><p>GM sold the Vortec 8100 to Workhorse (now a division of Navistar), making it one of the most popular engine choices in gasoline-powered Class A motorhomes during the early 2000s. GM stopped installing big-block V8s in the Silverado HD trucks when the GMT800 series was discontinued in 2007. </p><p>Vortec 8100s were built at GM's <a href="/wiki/Tonawanda_Engine" title="Tonawanda Engine">Tonawanda Engine</a> plant while the engine block and cylinder head were cast at <a href="/wiki/Saginaw_Metal_Casting_Operations" title="Saginaw Metal Casting Operations">Saginaw Metal Casting Operations</a>. The last L18 was manufactured in December 2009. </p><p>L18 applications: </p> <ul><li>2001–2002 <a href="/wiki/Chevrolet_C/K_(fourth_generation)#C3500HD_(1991–2002)" title="Chevrolet C/K (fourth generation)">Chevrolet/GMC C3500HD</a></li> <li>2001–2007 <a href="/wiki/Chevrolet_Silverado" title="Chevrolet Silverado">Chevrolet Silverado</a>/<a href="/wiki/GMC_Sierra" class="mw-redirect" title="GMC Sierra">GMC Sierra</a> 2500HD and 3500 (option)</li> <li>2001–2006 <a href="/wiki/Chevrolet_Suburban" title="Chevrolet Suburban">Chevrolet Suburban</a>/<a href="/wiki/GMC_Yukon_XL" class="mw-redirect" title="GMC Yukon XL">GMC Yukon XL</a> 2500 (option)</li> <li>2001–2002 <a href="/wiki/Chevrolet_Express" title="Chevrolet Express">Chevrolet Express</a>/<a href="/wiki/GMC_Savana" class="mw-redirect" title="GMC Savana">GMC Savana</a> 3500</li> <li>2002–2006 <a href="/wiki/Chevrolet_Avalanche_2500" class="mw-redirect" title="Chevrolet Avalanche 2500">Chevrolet Avalanche 2500</a> (standard)</li> <li>2001–2010 <a href="/wiki/Chevrolet_Kodiak" title="Chevrolet Kodiak">Chevrolet Kodiak/GMC TopKick</a> (including <a href="/wiki/U-Haul" title="U-Haul">U-Haul</a>'s 26-foot (7.9 m) truck)</li> <li><a href="/wiki/Navistar_International" class="mw-redirect" title="Navistar International">Workhorse</a> Class A motorhomes</li> <li><a href="/wiki/T-98_Kombat" title="T-98 Kombat">T-98 Kombat</a> armored vehicles</li> <li><a href="/wiki/Malibu_Boats" title="Malibu Boats">Malibu Boats</a>, including the Wakesetter<sup id="cite_ref-67" class="reference"><a href="#cite_note-67"><span class="cite-bracket">[</span>64<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/MasterCraft_Boats" class="mw-redirect" title="MasterCraft Boats">MasterCraft Boats</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Aftermarket">Aftermarket</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=27" title="Edit section: Aftermarket"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Many custom engine builders across the United States, as well as a large variety of aftermarket components manufactured for the big-block family, make it possible to build a complete big-block engine that contains no Chevrolet components. Blocks made of both iron and aluminum alloys, for many different purposes – e.g. street-use, racing, etc. – are available in stock or modified configurations, as well as with increased deck height to allow for a longer stroke or more favorable rod length ratios, depending on intent, providing the ability to make engines with capacities of 632-cubic-inch (10.4 L),<sup id="cite_ref-68" class="reference"><a href="#cite_note-68"><span class="cite-bracket">[</span>65<span class="cite-bracket">]</span></a></sup> 798-cubic-inch (13.1 L),<sup id="cite_ref-69" class="reference"><a href="#cite_note-69"><span class="cite-bracket">[</span>66<span class="cite-bracket">]</span></a></sup> and as large as 1,005.8-cubic-inch (16.5 L).<sup id="cite_ref-70" class="reference"><a href="#cite_note-70"><span class="cite-bracket">[</span>67<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=28" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>From the 1950s through the 1970s, each GM division had its own V8 engine family. Many were shared with other divisions, but each design is most closely associated with its own division: </p> <ul><li><a href="/wiki/Buick_V8_engine" title="Buick V8 engine">Buick V8 engine</a></li> <li><a href="/wiki/Cadillac_V8_engine" title="Cadillac V8 engine">Cadillac V8 engine</a></li> <li><a href="/wiki/Chevrolet_Small-Block_engine" class="mw-redirect" title="Chevrolet Small-Block engine">Chevrolet Small-Block engine</a></li> <li><a href="/wiki/GMC_V8_engine" title="GMC V8 engine">GMC V8 engine</a></li> <li><a href="/wiki/Oldsmobile_V8_engine" title="Oldsmobile V8 engine">Oldsmobile V8 engine</a></li> <li><a href="/wiki/Pontiac_V8_engine" title="Pontiac V8 engine">Pontiac V8 engine</a></li> <li><a href="/wiki/Holden_V8_engine" title="Holden V8 engine">Holden V8 engine</a></li></ul> <p>GM later standardized on the later generations of the Chevrolet design: </p> <ul><li><a href="/wiki/GM_LT_engine" class="mw-redirect" title="GM LT engine">GM LT engine</a> – Generation II small-block</li> <li><a href="/wiki/GM_LS_engine" class="mw-redirect" title="GM LS engine">GM LS engine</a> – Generation III/IV small-block</li> <li><a href="/wiki/List_of_GM_engines" title="List of GM engines">List of GM engines</a></li></ul> <p>Competitors' equivalent offerings: </p> <ul><li><a href="/wiki/Chrysler_B_engine" title="Chrysler B engine">Chrysler B engine</a> – wedge</li> <li><a href="/wiki/Chrysler_Hemi_engine" title="Chrysler Hemi engine">Chrysler Hemi engine</a> – hemi</li> <li><a href="/wiki/Ford_385_engine" title="Ford 385 engine">Ford 385 engine</a> – big-block</li> <li><a href="/wiki/Ford_FE_engine" title="Ford FE engine">Ford FE engine</a> – big-block</li> <li><a href="/wiki/AMC_V8_engine" title="AMC V8 engine">AMC V8 engine</a> – medium-block</li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=29" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-37"><span class="mw-cite-backlink"><b><a href="#cite_ref-37">^</a></b></span> <span class="reference-text">Chevrolet actually advertised this engine as 450 hp (336 kW) for a short period of time. There is speculation over whether this engine actually put out 450 hp (336 kW) gross, or if this was a marketing oversight that was later corrected.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (May 2024)">citation needed</span></a></i>]</sup></span> </li> <li id="cite_note-38"><span class="mw-cite-backlink"><b><a href="#cite_ref-38">^</a></b></span> <span class="reference-text">L88 had a 12.5:1 compression ratio with closed chamber heads except during the last half of 1969, when it had open chambered heads that yielded 12.0:1<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (May 2024)">citation needed</span></a></i>]</sup></span> </li> <li id="cite_note-39"><span class="mw-cite-backlink"><b><a href="#cite_ref-39">^</a></b></span> <span class="reference-text">L88 was rated for 430 hp (321 kW) at 5200 rpm. With stock exhaust manifolds and operation in the 6,800 rpm range, it was generally accepted that the engine was capable of producing in excess of 500 hp (373 kW) gross with free-flowing (open) long tube headers.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (May 2024)">citation needed</span></a></i>]</sup></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Citations">Citations</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=30" title="Edit section: Citations"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://corvette-racing.tripod.com/id11.html">"Grand Touring Prototype"</a>. 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Archived from <a rel="nofollow" class="external text" href="http://www.shafiroff.com/chevy_crate_engines/632_bigdawg_twisted_sr20.php">the original</a> on April 19, 2015<span class="reference-accessdate">. Retrieved <span class="nowrap">April 19,</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Shafiroff+Racing&rft.atitle=632+Big+Block+Chevy+UltraStreet+Big+Dawg+Twisted+SR20+Crate+Engine&rft_id=http%3A%2F%2Fwww.shafiroff.com%2Fchevy_crate_engines%2F632_bigdawg_twisted_sr20.php&rfr_id=info%3Asid%2Fen.wikipedia.org%3AChevrolet+big-block+engine" class="Z3988"></span></span> </li> <li id="cite_note-69"><span class="mw-cite-backlink"><b><a href="#cite_ref-69">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation audio-visual cs1"><a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=rDIPIQp3B5k"><i>798 cubic inch big block chevy: first start up of the 798 cid engine in the 66 chevelle</i></a>. <i>YouTube</i> (Video). <a rel="nofollow" class="external text" href="https://ghostarchive.org/varchive/youtube/20211222/rDIPIQp3B5k">Archived</a> from the original on 2021-12-22<span class="reference-accessdate">. Retrieved <span class="nowrap">October 9,</span> 2019</span> – via YouTube.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=798+cubic+inch+big+block+chevy%3A+first+start+up+of+the+798+cid+engine+in+the+66+chevelle&rft_id=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DrDIPIQp3B5k&rfr_id=info%3Asid%2Fen.wikipedia.org%3AChevrolet+big-block+engine" class="Z3988"></span></span> </li> <li id="cite_note-70"><span class="mw-cite-backlink"><b><a href="#cite_ref-70">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.hotrod.com/articles/1211sr-1005ci-godfather-big-block-engine/">"1005.8ci Godfather Big Block Engine – The Biggest Rat Ever!"</a>. <i>HotRod</i>. November 2012<span class="reference-accessdate">. Retrieved <span class="nowrap">February 16,</span> 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=HotRod&rft.atitle=1005.8ci+Godfather+Big+Block+Engine+%E2%80%93+The+Biggest+Rat+Ever%21&rft.date=2012-11&rft_id=http%3A%2F%2Fwww.hotrod.com%2Farticles%2F1211sr-1005ci-godfather-big-block-engine%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AChevrolet+big-block+engine" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Chevrolet_big-block_engine&action=edit&section=31" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPeter_C_Sessler1999" class="citation book cs1">Peter C Sessler (1999). <i>Ultimate American V8 Engine Data Book</i>. MotorBooks/MBI Publishing Company. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-7603-0489-0" title="Special:BookSources/0-7603-0489-0"><bdi>0-7603-0489-0</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Ultimate+American+V8+Engine+Data+Book&rft.pub=MotorBooks%2FMBI+Publishing+Company&rft.date=1999&rft.isbn=0-7603-0489-0&rft.au=Peter+C+Sessler&rfr_id=info%3Asid%2Fen.wikipedia.org%3AChevrolet+big-block+engine" class="Z3988"></span></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline 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colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0;border-width:0;"><div style="padding:0"> <table style="width:100%" class="wraplinks"> <tbody><tr style="background-color:#EFEFEF"> <td colspan="3" rowspan="2" style="width=12%"><b>Type</b> </td> <td colspan="10" style="width=20%">1980s </td> <td colspan="10" style="width=20%">1990s </td> <td colspan="10" style="width=20%">2000s </td> <td colspan="10" style="width=20%">2010s </td> <td colspan="10" style="width=8%">2020s </td></tr> <tr style="background-color:#EFEFEF"> <td width="2%">0</td> <td width="2%">1</td> <td width="2%">2</td> <td width="2%">3</td> <td width="2%">4</td> <td width="2%">5</td> <td width="2%">6</td> <td width="2%">7</td> <td width="2%">8</td> <td width="2%">9 </td> <td width="2%">0</td> <td width="2%">1</td> <td width="2%">2</td> <td width="2%">3</td> <td width="2%">4</td> <td width="2%">5</td> <td width="2%">6</td> <td width="2%">7</td> <td width="2%">8</td> <td width="2%">9 </td> <td width="2%">0</td> <td width="2%">1</td> <td width="2%">2</td> <td width="2%">3</td> <td width="2%">4</td> <td width="2%">5</td> <td width="2%">6</td> <td width="2%">7</td> <td width="2%">8</td> <td width="2%">9 </td> <td width="2%">0</td> <td width="2%">1</td> <td width="2%">2</td> <td width="2%">3</td> <td width="2%">4</td> <td width="2%">5</td> <td width="2%">6</td> <td width="2%">7</td> <td width="2%">8</td> <td width="2%">9 </td> <td width="2%">0</td> <td width="2%">1</td> <td width="2%">2</td> <td width="2%">3</td> <td width="2%">4 </td></tr> <tr style="background-color:#E0E0E0"> <td rowspan="36" style="background-color:#EFEFEF"><a href="/wiki/Gasoline_engine" class="mw-redirect" title="Gasoline engine">Gasoline</a> </td> <td style="background-color:#EFEFEF"><a href="/wiki/Flat_engine" title="Flat engine">Flat</a> </td> <td style="background-color:#EFEFEF">4 </td> <td colspan="25"> </td> <td colspan="2" style="background-color:#CCE3EC"><a href="/wiki/Subaru_EJ_engine" title="Subaru EJ engine"><i>EJ</i></a> </td> <td colspan="18"> </td></tr> <tr style="background-color:#E0E0E0"> <td rowspan="19" style="background-color:#EFEFEF"><a href="/wiki/Inline_engine_(aeronautics)" title="Inline engine (aeronautics)">Inline</a> </td> <td rowspan="4" style="background-color:#EFEFEF">3 </td> <td colspan="11" style="background-color:#E6B0AA"><a href="/wiki/Suzuki_G_engine" title="Suzuki G engine"><i>G</i></a> </td> <td colspan="34" style="background-color:#C0C0C0"><a href="/wiki/Daewoo_S-TEC_engine" title="Daewoo S-TEC engine">S-TEC</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="16"> </td> <td colspan="29" style="background-color:#C0C0C0"><a href="/wiki/GM_Family_0_engine" title="GM Family 0 engine">Family 0</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="33"> </td> <td colspan="12" style="background-color:#C0C0C0"><a href="/wiki/GM_small_gasoline_engine" title="GM small gasoline engine">SGE</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="38"> </td> <td colspan="7" style="background-color:#C0C0C0"><a href="/wiki/GM_E-Turbo_engine" title="GM E-Turbo engine">E-Turbo</a> </td></tr> <tr style="background-color:#E0E0E0"> <td rowspan="11" style="background-color:#EFEFEF">4 </td> <td colspan="14" style="background-color:#C0C0C0"><a href="/wiki/Opel_OHV_engine" title="Opel OHV engine">Opel OHV engine</a> </td> <td colspan="31" style="background-color:#C0C0C0"><a href="/wiki/GM_Ecotec_engine" title="GM Ecotec engine">GM Ecotec</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="14" style="background-color:#C0C0C0"><a href="/wiki/Iron_Duke_engine" title="Iron Duke engine">Iron Duke</a> </td> <td colspan="2"> </td> <td colspan="29" style="background-color:#C0C0C0"><a href="/wiki/GM_Family_0_engine" title="GM Family 0 engine">Family 0</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="19" style="background-color:#C0C0C0"><a href="/wiki/Opel_cam-in-head_engine#Four-cylinder_versions" title="Opel cam-in-head engine">Opel CIH</a> </td> <td colspan="1"> </td> <td colspan="9" style="background-color:#C0C0C0"><a href="/wiki/Saab_H_engine" title="Saab H engine">Saab H</a> </td> <td colspan="2" style="background-color:#FAD7A0"><a href="/wiki/Toyota_AZ_engine" title="Toyota AZ engine"><i>AZ</i></a> </td> <td colspan="14" rowspan="2"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="7" style="background-color:#D8BFD8"><a href="/wiki/List_of_Isuzu_engines#Isuzu_G_engine" title="List of Isuzu engines"><i>G</i></a> </td> <td colspan="16" style="background-color:#C0C0C0"><a href="/wiki/Quad_4_engine" title="Quad 4 engine">Quad 4</a> </td> <td colspan="6" style="background-color:#FAD7A0"><a href="/wiki/Toyota_ZZ_engine" title="Toyota ZZ engine"><i>ZZ</i></a> </td> <td colspan="2" style="background-color:#FAD7A0"><a href="/wiki/Toyota_ZR_engine" title="Toyota ZR engine"><i>ZR</i></a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="9" style="background-color:#C0C0C0"><a href="/wiki/Vauxhall_Slant-4_engine" title="Vauxhall Slant-4 engine">Vauxhall Slant-4</a> </td> <td colspan="9" style="background-color:#FAD7A0"><a href="/wiki/Toyota_A_engine" title="Toyota A engine"><i>A</i></a> </td> <td colspan="4"> </td> <td colspan="23" style="background-color:#C0C0C0"><a href="/wiki/Daewoo_S-TEC_engine" title="Daewoo S-TEC engine">S-TEC</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="7" style="background-color:#C0C0C0"><a href="/wiki/Holden_Starfire_engine" class="mw-redirect" title="Holden Starfire engine">Holden Starfire</a> </td> <td colspan="3"> </td> <td colspan="13" style="background-color:#C0C0C0"><a href="/wiki/Saturn_I4_engine" title="Saturn I4 engine">Saturn</a> </td> <td colspan="1"> </td> <td colspan="9" style="background-color:#C0C0C0"><a href="/wiki/General_Motors_Atlas_engine" title="General Motors Atlas engine">Atlas</a> </td> <td colspan="12" style="background-color:#C0C0C0"><a href="/wiki/GM_Medium_Gasoline_Engine" title="GM Medium Gasoline Engine">MGE</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="35" style="background-color:#C0C0C0"><a href="/wiki/GM_Family_II_engine" title="GM Family II engine">Family II</a> </td> <td colspan="10" style="background-color:#C0C0C0"><a href="/wiki/GM_small_gasoline_engine" title="GM small gasoline engine">SGE</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="2" rowspan="2"> </td> <td colspan="43" style="background-color:#C0C0C0"><a href="/wiki/GM_Family_1_engine" title="GM Family 1 engine">Family 1</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="22" style="background-color:#C0C0C0"><a href="/wiki/General_Motors_122_engine" title="General Motors 122 engine">122</a> </td> <td colspan="14"> </td> <td colspan="7" style="background-color:#C0C0C0"><a href="/wiki/GM_L3B_engine" title="GM L3B engine">GM L3B</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="10"> </td> <td colspan="4" style="background-color:#D8BFD8"><a href="/wiki/Isuzu_X_engine" class="mw-redirect" title="Isuzu X engine"><i>X</i></a> </td> <td colspan="1"> </td> <td colspan="8" style="background-color:#E6B0AA"><a href="/wiki/Suzuki_G_engine" title="Suzuki G engine"><i>G</i></a> </td> <td colspan="22" rowspan="2"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="15"> </td> <td colspan="8" style="background-color:#E6B0AA"><a href="/wiki/Suzuki_J_engine" title="Suzuki J engine"><i>J</i></a> </td></tr> <tr style="background-color:#E0E0E0"> <td style="background-color:#EFEFEF">5 </td> <td colspan="22"> </td> <td colspan="11" style="background-color:#C0C0C0"><a href="/wiki/General_Motors_Atlas_engine" title="General Motors Atlas engine">Atlas</a> </td> <td colspan="12"> </td></tr> <tr style="background-color:#E0E0E0"> <td rowspan="10" style="background-color:#EFEFEF;">6 </td> <td colspan="22" style="background-color:#C0C0C0"><a href="/wiki/Chevrolet_Turbo-Thrift_engine" title="Chevrolet Turbo-Thrift engine">Chevrolet Turbo-Thrift</a> </td> <td colspan="23"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="1" style="background-color:#C0C0C0"><a href="/wiki/Holden_Red_motor" class="mw-redirect" title="Holden Red motor">Red</a> </td> <td colspan="4" style="background-color:#C0C0C0"><a href="/wiki/Holden_Blue_motor" class="mw-redirect" title="Holden Blue motor">Blue</a> </td> <td colspan="2" style="background-color:#C0C0C0"><a href="/wiki/Holden_Black_motor" class="mw-redirect" title="Holden Black motor">Black</a> </td> <td colspan="2" style="background-color:#87CEFA"><a href="/wiki/Nissan_RB_engine#RB30" title="Nissan RB engine"><i>RB30</i></a> </td> <td colspan="12"> </td> <td colspan="9" style="background-color:#C0C0C0"><a href="/wiki/General_Motors_Atlas_engine" title="General Motors Atlas engine">Atlas</a> </td> <td colspan="15"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="14" style="background-color:#C0C0C0"><a href="/wiki/Opel_cam-in-head_engine#Six-cylinder_versions" title="Opel cam-in-head engine">Opel CIH</a> </td> <td colspan="5"> </td> <td colspan="13" style="background-color:#C0C0C0"><a href="/wiki/Daewoo_Magnus" title="Daewoo Magnus">E-TEC</a> </td> <td colspan="13"> </td></tr> <tr style="background-color:#E0E0E0"> <td rowspan="19" style="background-color:#EFEFEF"><a href="/wiki/V_engine" title="V engine">V</a> </td> <td colspan="29" style="background-color:#C0C0C0"><a href="/wiki/Buick_V6_engine" title="Buick V6 engine">Buick/3800</a> </td> <td colspan="16"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="35" style="background-color:#C0C0C0"><a href="/wiki/Chevrolet_90%C2%B0_V6_engine" title="Chevrolet 90° V6 engine">Chevrolet 90°</a> </td> <td colspan="10"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="31" style="background-color:#C0C0C0"><a href="/wiki/General_Motors_60%C2%B0_V6_engine" title="General Motors 60° V6 engine">GM 60°</a> </td> <td colspan="3"> </td> <td colspan="11" style="background-color:#C0C0C0"><a href="/wiki/Chevrolet_90%C2%B0_V6_engine" title="Chevrolet 90° V6 engine">Gen V 90°</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="19"> </td> <td colspan="4" style="background-color:#C0C0C0"><a href="/wiki/Northstar_engine_series#LX5_(Shortstar)" title="Northstar engine series">Shortstar</a> </td> <td colspan="1"> </td> <td colspan="8" style="background-color:#C0C0C0"><a href="/wiki/GM_High_Value_engine" title="GM High Value engine">High Value</a> </td> <td colspan="13"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="14"> </td> <td colspan="11" style="background-color:#C0C0C0"><a href="/wiki/General_Motors_54%C2%B0_V6_engine" title="General Motors 54° V6 engine">Opel 54°</a> </td> <td colspan="20" style="background-color:#C0C0C0"><a href="/wiki/GM_High_Feature_engine" title="GM High Feature engine">High Feature</a> </td></tr> <tr style="background-color:#E0E0E0;"> <td colspan="21"> </td> <td colspan="4" style="background-color:#E6B0AA"><a href="/wiki/Suzuki_H_engine#H25A" title="Suzuki H engine"><i>H</i></a> </td> <td colspan="20"> </td></tr> <tr style="background-color:#E0E0E0;"> <td colspan="24"> </td> <td colspan="4" style="background-color:#7FFFD4"><a href="/wiki/Honda_J_engine#J35S" title="Honda J engine"><i>J</i></a> </td> <td colspan="17"> </td></tr> <tr style="background-color:#E0E0E0"> <td rowspan="11" style="background-color:#EFEFEF">8 </td> <td colspan="2" style="background-color:#C0C0C0"><a href="/wiki/Buick_V8_engine" title="Buick V8 engine">Buick</a> </td> <td colspan="43"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="5" style="background-color:#C0C0C0"><a href="/wiki/Cadillac_V8_engine" title="Cadillac V8 engine">Cadillac OHV</a> </td> <td colspan="6"> </td> <td colspan="20" style="background-color:#C0C0C0"><a href="/wiki/Northstar_engine_series" title="Northstar engine series">Northstar</a> </td> <td colspan="7"> </td> <td colspan="3" style="background-color:#C0C0C0"><a href="/wiki/Cadillac_twin-turbo_V8" title="Cadillac twin-turbo V8">Blackwing</a> </td> <td colspan="4"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="2"> </td> <td colspan="14" style="background-color:#C0C0C0"><a href="/wiki/Cadillac_High_Technology_engine" title="Cadillac High Technology engine">High Technology</a> </td> <td colspan="29"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="30" style="background-color:#C0C0C0"><a class="mw-selflink selflink">Big Block</a> </td> <td colspan="15"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="24" style="background-color:#C0C0C0"><a href="/wiki/Chevrolet_small-block_engine" title="Chevrolet small-block engine">Small Block</a> </td> <td colspan="18"> </td> <td colspan="3" style="background-color:#C0C0C0"><a href="/wiki/Chevrolet_Gemini_small-block_engine" title="Chevrolet Gemini small-block engine">Gemini</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="17"> </td> <td colspan="28" style="background-color:#C0C0C0"><a href="/wiki/LS_based_GM_small-block_engine" class="mw-redirect" title="LS based GM small-block engine">LS/LT</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="21" style="background-color:#C0C0C0"><a href="/wiki/Holden_V8_engine" title="Holden V8 engine">Holden</a> </td> <td colspan="24"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="11" style="background-color:#C0C0C0"><a href="/wiki/Oldsmobile_V8_engine" title="Oldsmobile V8 engine">Oldsmobile</a> </td> <td colspan="34"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="2" style="background-color:#C0C0C0"><a href="/wiki/Pontiac_V8_engine" title="Pontiac V8 engine">Pontiac</a> </td> <td colspan="43"> </td></tr> <tr style="background-color:#E0E0E0"> <td rowspan="11" style="background-color:#EFEFEF"><a href="/wiki/Diesel_engine" title="Diesel engine">Diesel</a> </td> <td colspan="2"> </td> <td colspan="23" style="background-color:#C0C0C0"><a href="/wiki/Detroit_Diesel_V8_engine" title="Detroit Diesel V8 engine">Detroit</a> </td> <td colspan="20"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="6" style="background-color:#C0C0C0"><a href="/wiki/Oldsmobile_Diesel_engine#LF9" title="Oldsmobile Diesel engine">Oldsmobile</a> </td> <td colspan="15"> </td> <td colspan="24" style="background-color:#C0C0C0"><a href="/wiki/Duramax_V8_engine" title="Duramax V8 engine">Duramax</a> </td></tr> <tr style="background-color:#E0E0E0"> <td rowspan="3" style="background-color:#EFEFEF">6 </td> <td colspan="2"> </td> <td colspan="4" style="background-color:#C0C0C0"><a href="/wiki/Oldsmobile_Diesel_engine#LT6" title="Oldsmobile Diesel engine">Oldsmobile</a> </td> <td colspan="15"> </td> <td colspan="8" style="background-color:#C0C0C0"><a href="/wiki/DMAX_V6_engine" title="DMAX V6 engine">DMAX</a> </td> <td colspan="16"> </td></tr> <tr style="background-color:#E0E0E0"> <td rowspan="8" style="background-color:#EFEFEF">Inline </td> <td colspan="15"> </td> <td colspan="7" style="background-color:#FFFACD"><a href="/wiki/BMW_M51" title="BMW M51"><i>M51</i></a> </td> <td colspan="18"> </td> <td colspan="5" style="background-color:#C0C0C0"><a href="/wiki/Duramax_I6_engine" title="Duramax I6 engine">Duramax</a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="7"> </td> <td colspan="14" style="background-color:#C0C0C0"><a href="/wiki/Detroit_Diesel_60" class="mw-redirect" title="Detroit Diesel 60">Detroit 60</a> </td> <td colspan="6"> </td> <td colspan="18" style="background-color:#D8BFD8"><a href="/wiki/Isuzu_6H_engine" title="Isuzu 6H engine"><i>6H</i></a> </td></tr> <tr style="background-color:#E0E0E0"> <td rowspan="6" style="background-color:#EFEFEF">4 </td> <td colspan="23" rowspan="2"> </td> <td colspan="22" style="background-color:#C0C0C0"><a href="/wiki/JTD_engine" class="mw-redirect" title="JTD engine"><i>JTD</i></a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="8" style="background-color:#E9967A"><a href="/wiki/List_of_VM_Motori_engines#RA_420_SOHC" title="List of VM Motori engines"><i>RA</i></a> </td> <td colspan="5" style="background-color:#C0C0C0"><a href="/wiki/GM_Family_Z_engine" title="GM Family Z engine">Family Z</a> </td> <td colspan="9"> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="2" rowspan="2"> </td> <td colspan="14" style="background-color:#D8BFD8"><a href="/wiki/List_of_Isuzu_engines#Isuzu_E_engine" title="List of Isuzu engines"><i>E</i></a> </td> <td colspan="3"> </td> <td colspan="16" style="background-color:#C0C0C0"><a href="/wiki/Circle_L_engine" title="Circle L engine">Circle L</a> </td> <td colspan="10" rowspan="2"> </td></tr> <tr style="background-color:#E0E0E0;"> <td colspan="19" style="background-color:#C0C0C0"><a href="/wiki/GM_Family_II_engine" title="GM Family II engine">Family II</a> </td> <td colspan="7"> </td> <td colspan="7" style="background-color:#C0C0C0"><a href="/wiki/GM_Family_B_engine" class="mw-redirect" title="GM Family B engine"><i>Family B</i></a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="33" rowspan="2"> </td> <td colspan="12" style="background-color:#E9967A"><a href="/wiki/List_of_VM_Motori_engines#A_428_DOHC" title="List of VM Motori engines"><i>A</i></a> </td></tr> <tr style="background-color:#E0E0E0"> <td colspan="12" style="background-color:#C0C0C0"><a href="/wiki/GM_Medium_Diesel_engine" title="GM Medium Diesel engine">MDE</a> </td></tr> <tr style="background-color:#EFEFEF"> <td colspan="3" rowspan="1"><b>Type</b> </td> <td colspan="10" style="width=20%">1980s </td> <td colspan="10" style="width=20%">1990s </td> <td colspan="10" style="width=20%">2000s </td> <td colspan="10" style="width=20%">2010s </td> <td colspan="5" style="width=8%">2020s </td></tr> <tr style="background-color:#EFEFEF"> <td colspan="3"><b>Legend</b> </td> <td colspan="45" style="text-align:left"> <ul><li><span style="margin:0px; font-size:90%;"><span style="border:none; background-color:#EFEFEF; color:#EFEFEF;">    </span> Italicized engines manufactured by</span></li> <li><span style="margin:0px; font-size:90%;"><span style="border:none; background-color:#CCE3EC; color:#CCE3EC;">    </span> <a href="/wiki/Subaru" title="Subaru">Subaru</a></span></li> <li><span style="margin:0px; font-size:90%;"><span style="border:none; background-color:#FAD7A0; color:#FAD7A0;">    </span> <a href="/wiki/Toyota" title="Toyota">Toyota</a></span></li> <li><span style="margin:0px; font-size:90%;"><span style="border:none; background-color:#D8BFD8; color:#D8BFD8;">    </span> <a href="/wiki/Isuzu" title="Isuzu">Isuzu</a></span></li> <li><span style="margin:0px; font-size:90%;"><span style="border:none; background-color:#E6B0AA; color:#E6B0AA;">    </span> <a 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