Open Chamber Heads vs Closed Chamber Heads....

toolmanmike said
I can personally say that I've run open chamber and close chamber heads on 318's, and the open chamber heads have always ran harder on the upper RPM's, even though they gave up compression. I'm talk'n 302 heads vs the worst head in the late '70's.

But was that because of the larger chambers or the larger ports?[/QUOTE]

Flow beats compression ratio when you have to compromise one or the other.

I’d rather have both, but sometimes you can’t.