A 383 stroker has a 0.030 over bore of the stock 350, giving you 4.030 as a bore diameter. Putting the 400 crank in the 350 increases the stroke to 3.750. Other than that, all the other dimensions stay the same. If you do the math, you will get 382.6; round up and you have 383 ci.

What's the difference between a 350 and a 383 stroker?

Premium Member. A stroker engine will have more cubic inches than a "regular" engine. A stock 350 piston travel is about 3.48 inches (88.4 mm) and in a 383 cubic inch stroker crankshaft the piston travels about 3.75 inches (95.25mm). That raises the displacement of the engine from 350 to 383 cubic inches.

What is the average horsepower of a 383 stroker?

Reported Performance Range

The GM ZZ383 Performance engine has 425 horsepower and 449 foot-pounds of torque. Other 383 stroker engines have been reported achieving 330 horsepower with 420 foot-pounds of torque, 395 horsepower with 410 foot-pounds of torque and 395 horsepower with 410 foot-pounds of torque.