cylinder heads · FF-0367

Why does the thickness above the combustion chamber matter on a blower head?

To make the chamber bigger on a stock or aftermarket head you machine away the roof above the valves, and that eats into what Steve calls the margin. He uses the thickness Ford chose for a low-compression 1930s engine as a starting point, because he finds Ford parts are well engineered. He notes that this is not a supercharged head.

Expert

Steve Coppock

Evidence

expert attributed

Component

chamber roof thickness

Applicable scope

Ford Flathead V8 cylinder heads for supercharged use