cylinder heads · FF-0377

How much chamber volume does an Offenhauser 425 head have, and is it enough for a blower?

Its chambers were checked at 66 to 69 cc, so they vary. Steve says a good supercharged application needs about 75 cc, so this head would need some work. Whether he would do it on this head, given the .224 reading, he is not sure; he wants to validate that measurement first.

Expert

Steve Coppock

Evidence

expert attributed

Component

Offenhauser 425 chamber volume

Applicable scope

Never-used Offenhauser 8BA-style head stamped 425