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Chevrolet big-block engine

Chevrolet big-block engine
454 big-block in a 1970 Chevrolet Chevelle SS
Overview
ManufacturerGeneral Motors
Production1958–present
Layout
ConfigurationNaturally aspirated 90° V8
Displacement
  • 348 cu in (5.7 L)
  • 366 cu in (6.0 L)
  • 396 cu in (6.5 L)
  • 402 cu in (6.6 L)
  • 409 cu in (6.7 L)
  • 427 cu in (7.0 L)
  • 454 cu in (7.4 L)
  • 496 cu in (8.1 L)
  • Aftermarket only:
  • 502 cu in (8.2 L)
  • 572 cu in (9.4 L)
  • 622 cu in (10.2 L)[1][2][3][4]
  • 632 cu in (10.4 L)
Cylinder bore
  • 3.935 in (99.9 mm)
  • 4.094 in (104.0 mm)
  • 4+1⁄8 in (104.8 mm)
  • 4+1⁄4 in (108.0 mm)
  • 4.31 in (109.5 mm)
  • 4.466 in (113.4 mm)
  • 4.56 in (115.8 mm)
  • 4.6 in (116.8 mm)
Piston stroke
  • 3+1⁄4 in (82.6 mm)
  • 3+1⁄2 in (88.9 mm)
  • 3.65 in (92.7 mm)
  • 3.76 in (95.5 mm)
  • 4 in (101.6 mm)
  • 4.37 in (111.0 mm)
  • 4+3⁄8 in (111.1 mm)
  • 4+3⁄4 in (120.7 mm)
Cylinder block materialCast iron
Cylinder head materialCast iron, aluminum
ValvetrainOHV 2 valves × cyl.
Compression ratio8.5:1, 9.0:1, 10.25:1, 11.0:1, 12.0:1, 12.5:1, 13.5:1
Combustion
Fuel systemCarburetor
Fuel injection (Since Gen. V)
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output250–1,004 hp (186–749 kW)
Torque output385–876 lb⋅ft (522–1,188 N⋅m)
Dimensions
Dry weight517–761 lb (235–345 kg)[5][6][7][8][9][10]

The Chevrolet big-block engine is a series of large-displacement, naturally-aspirated, 90°, overhead valve, gasoline-powered, V8 engines 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 small-block V8 in 1955, but needed something larger to power its medium duty trucks and the heavier cars that were on the drawing board. The big-block,[11] which debuted in 1958 at 348 cu in (5.7 L), was built in standard displacements up to 496 cu in (8.1 L), with aftermarket crate engines sold by Chevrolet exceeding 500 cu in (8.2 L).

  1. ^ "Grand Touring Prototype". Corvette-racing.tripod.com. Retrieved 2022-04-11.
  2. ^ GJD Multimedia. "Lola Heritage". Lola Heritage. Retrieved 2022-04-11.
  3. ^ "1988 Lola T – Corvette Gr C ex Le Mans 1990 with 10,5 Liter Engine | Classic Driver Market". Classicdriver.com. 2022-02-08. Retrieved 2022-04-11.
  4. ^ Young, Aaron (2020-10-28). "The Sickest Corvette Race Cars From Motorsports History". Hotcars.com. Retrieved 2022-04-11.
  5. ^ "2nd Gen Camaro Component Weight Database". Brian-callahan.com. Retrieved 2022-04-11.
  6. ^ "How much does it weigh?".
  7. ^ "How Much Does a Small Block Chevy Engine Weight? – McNally Institute".[dead link‍]
  8. ^ "What is the weight of a Chevy 454 engine?".
  9. ^ Lorne Michael Goldman. "Engine Weights II". Gomog.com. Retrieved 2022-04-11.
  10. ^ "which 496 BBC engine? | Grumpys Performance Garage". Garage.grumpysperformance.com. Retrieved 2022-04-11.
  11. ^ Worner, Randy (October 14, 2022). "Big Block Chevy Engines Specs and Sizes". Chevy Geek. Retrieved April 26, 2023.
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