Editing Chevrolet big-block engine (section)

{{short description|American V-8 car engine}}
{{Infobox automobile engine
| name = Chevrolet big-block engine
| image = 2014 Rolling Sculpture Car Show 47 (1970 Chevrolet Chevelle SS 454 engine).jpg
| caption = 454 big-block in a 1970 Chevrolet Chevelle SS
| manufacturer = [[General Motors]]
| production = 1958–present
| configuration = [[Naturally aspirated]] 90° [[V8 engine|V8]]
| valvetrain = [[Overhead valve engine|OHV]] 2 [[Poppet valve|valves]] × [[Cylinder (engine)|cyl]].
| block = [[Cast iron]]
| head = Cast iron, [[aluminum]]
| fueltype = [[Gasoline]]
| fuelsystem = [[Carburetor]]<br />[[Fuel injection]] (Since Gen. V)
| coolingsystem = [[Radiator (engine cooling)|Water-cooled]]
| bore = {{ubl|{{cvt|3.935|in|mm|lk=on}}|{{cvt|4.094|in|1}}|{{cvt|4+1/8|in|1}}|{{cvt|4+1/4|in|1}}|{{cvt|4.31|in|1}}|{{cvt|4.466|in|1}}|{{cvt|4.56|in|1}}|{{cvt|4.6|in|1}} }}
| stroke = {{ubl|{{cvt|3+1/4|in|1}}|{{cvt|3+1/2|in|1}}|{{cvt|3.65|in|1}}|{{cvt|3.76|in|1}}|{{cvt|4|in|1}}|{{cvt|4.37|in|1}}|{{cvt|4+3/8|in|1}}|{{cvt|4+3/4|in|1}} }}
| displacement = {{ubl|{{cvt|348|cuin|L|1|lk=on}}|{{cvt|366|cuin|L|1}}|{{cvt|396|cuin|L|1}}|{{cvt|402|cuin|L|1}}|{{cvt|409|cuin|L|1}}|{{cvt|427|cuin|L|1}}|{{cvt|454|cuin|L|1}}|{{cvt|496|cuin|L|1}}|Aftermarket only:|{{cvt|502|cuin|L|1}}|{{cvt|572|cuin|L|1}}|{{cvt|622|cuin|L|1}}<ref>{{cite web|url=https://corvette-racing.tripod.com/id11.html |title=Grand Touring Prototype |publisher=Corvette-racing.tripod.com |date= |access-date=2022-04-11}}</ref><ref>{{cite web|author=GJD Multimedia |url=http://www.lolaheritage.co.uk/2018/type_numbers/t88-11/t88-11.html |title=Lola Heritage |publisher=Lola Heritage |date= |access-date=2022-04-11}}</ref><ref>{{cite web|url=https://www.classicdriver.com/en/car/lola/t/1988/730848 |title=1988 Lola T – Corvette Gr C ex Le Mans 1990 with 10,5 Liter Engine &#124; Classic Driver Market |publisher=Classicdriver.com |date=2022-02-08 |access-date=2022-04-11}}</ref><ref>{{cite web|last=Young |first=Aaron |url=https://www.hotcars.com/the-sickest-corvette-race-cars-from-motorsports-history/ |title=The Sickest Corvette Race Cars From Motorsports History |publisher=Hotcars.com |date=2020-10-28 |access-date=2022-04-11}}</ref>|{{cvt|632|cuin|L|1}} }}
| compression = 8.5:1, 9.0:1, 10.25:1, 11.0:1, 12.0:1, 12.5:1, 13.5:1
| power = {{cvt|250|-|1004|hp|0|lk=on}}
| torque = {{cvt|385|-|876|lbft|0|lk=on}}
| weight = {{cvt|517|-|761|lb|kg|lk=on}}<ref>{{cite web|url=https://brian-callahan.com/Brians%20stuff/camaro_database.htm |title=2nd Gen Camaro Component Weight Database |publisher=Brian-callahan.com |date= |access-date=2022-04-11}}</ref><ref>{{Cite web | url=https://www.pro-touring.com/threads/56068-How-much-does-it-weigh | title=How much does it weigh? }}</ref><ref>{{Cite web | url=https://www.mcnallyinstitute.com/how-much-does-a-small-block-chevy-engine-weight/ | title=How Much Does a Small Block Chevy Engine Weight? – McNally Institute }}{{dead link|date=July 2023}}</ref><ref>{{cite web | url=https://everythingwhat.com/what-is-the-weight-of-a-chevy-454-engine | title=What is the weight of a Chevy 454 engine? }}</ref><ref>{{cite web|author=Lorne Michael Goldman |url=https://www.gomog.com/allmorgan/engineweights2.html |title=Engine Weights II |publisher=Gomog.com |date= |access-date=2022-04-11}}</ref><ref>{{cite web|url=http://garage.grumpysperformance.com/index.php?threads/which-496-bbc-engine.12291/ |title=which 496 BBC engine? &#124; Grumpys Performance Garage |publisher=Garage.grumpysperformance.com |date= |access-date=2022-04-11}}</ref>
}}

The '''Chevrolet big-block''' engine is a series of [[Engine displacement|large-displacement]], [[naturally-aspirated]], 90°, [[overhead valve]], [[Gasoline engine|gasoline]]-powered, [[V8 engine]]s that was developed and have been produced by the [[Chevrolet Division]] of [[General Motors]] from the late 1950s until present. They have powered countless General Motors products, not just Chevrolets, and have been used in a variety of cars from other manufacturers as well - from boats to motorhomes to armored vehicles.

Chevrolet had introduced its popular [[Chevrolet small-block engine (first and second generation)|small-block V8]] in 1955, but needed something larger to power its [[Chevrolet Kodiak|medium duty trucks]] and the heavier cars that were on the drawing board. The big-block,<ref>{{Cite web |last=Worner |first=Randy |date=October 14, 2022 |title=Big Block Chevy Engines Specs and Sizes |url=https://chevygeek.com/sbc-bbc-v6-chevy-engines-specs-chart/#big-block |access-date=April 26, 2023 |website=Chevy Geek}}</ref> which debuted in 1958 at {{cvt|348|cuin|L|1|lk=on}}, was built in standard displacements up to {{cvt|496|cuin|L|1}}, with aftermarket [[crate engine]]s sold by Chevrolet exceeding {{cvt|500|cuin|L|1}}.