Quote:

Quote:

It's 100% the combustion chamber and doesn't matter what shortblock is under it. (Of course, the top of the piston is the bottom of the combustion chamber.) The better the chamber the shorter ignition lead required for max power.

R.



Hmm, I have a 20cc dish piston including the .350 deep valve reliefs so it's not a lot of dish.

Thanks for the answers, I guess I'm in the ballpark at 30 and I'll work from there.



I would think that you would be better off with a
bit more timing... my W-9 likes 34* and most of my
W heads like right at 34* or a touch more... I'm talking
W-2, W-5, or W-9... I'm gonna have to test with my
W-5s on my 416 and pump gas to see what it likes...
I set it up for 34* to start with