What size block is a 383 stroker?

Answered by James Kissner

The 383 stroker is a popular and powerful combination that is based on a small-block Chevy engine. The term “383” refers to the engine’s displacement, which is 383 cubic inches. This is achieved by using a larger bore and a longer stroke than the original 350 small-block.

To build a 383 stroker, you start with a standard 350 small-block Chevy engine block. The block is typically bored out to a larger diameter of 4.005 inches, which allows for larger pistons to be used. This increase in bore size helps to increase the engine’s overall displacement.

In addition to the larger bore, a 383 stroker also utilizes a longer stroke crankshaft. The stroke refers to the distance that the piston travels up and down within the cylinder. In the case of a 383 stroker, the stroke is increased to 3.800 inches, which is 0.125 inches longer than the stock 350 stroke.

By combining the larger bore and longer stroke, the 383 stroker is able to generate more torque and horsepower compared to a stock 350 engine. The increased displacement allows for more air and fuel to be drawn into the cylinders, resulting in improved combustion and power output.

The 383 stroker is known for its exceptional low-end torque, which is ideal for applications such as street rods, muscle cars, and trucks. The longer stroke helps to increase the engine’s pulling power at lower RPMs, making it well-suited for heavy hauling or off-road use.

Not only does the 383 stroker offer impressive low-end torque, but it also delivers surprising high-rpm horsepower. The combination of the larger bore and longer stroke allows for better airflow and increased cylinder filling, which translates to more power at higher RPMs. This makes the 383 stroker a versatile choice for both street and strip applications.

The 383 stroker is a popular and powerful engine combination that is based on a small-block Chevy block. It utilizes a larger bore of 4.005 inches and a longer stroke of 3.800 inches to achieve a displacement of 383 cubic inches. The 383 stroker offers exceptional low-end torque and surprising high-rpm horsepower, making it a popular choice for performance enthusiasts.