Specs for a 454 Stroker Engine

General Motors produced three versions of the 454 Stroker engine from 1970 until 2000. GM used the efficient 454, the 454ci and the LS7 engines in its Corvette and Chevelle models, as well as its truck lines.

454

GM began manufacturing the 7.4-liter, 454 engine in 1970, using its previous 396 and 427ci engines as building platforms. It had a 4.25-inch bore -- the amount of space an engine has to enter a combustion chamber -- and a four-inch stroke -- the distance a piston must travel each direction when entering and exiting an engine's combustion chamber. It produced 500 foot-pounds of torque -- the amount of force required to move a vehicle forward -- and 390 horsepower.

454ci

Built for performance, the 454ci powered Chevrolet's Chevelle SS and Corvette models and was an optional upgrade in several GM trucks and larger cars. In racing applications, it could be modified to generate in excess of 750 horsepower, but the base-model 454ci was rated at 450 horsepower.

LS7

GM designed the LS7, although it never mass-produced it; however, a small number of dealers manufactured, then parted out its manifold for use as performance upgrades. It produced 465 horsepower and 490 foot-pounds of torque.

References

• 454-engine.com: 454 Engine
• Turbo: Engine Block Math