Jay Smith

[Chummy]

Hey Jay, I remember a formula you had a while back that was pertaining to compression ratio and the cc on the heads. Can you refresh me on what that was?

[Jay Smith]

This formula "works" on an "umbrelled" combustion chamber head on 2.5 260 & early model gasketed drags ( not "0" ringers) For each .010" of material that is removed you deminish the CC by .7

Example if you cut .020" off the head described you reduce the CC by 1.4
This formula will NOT work on shallow bowled Drag Motor head. The safest thing to do is to check the CC regularly while cutting to keep OOPPPS to a bare minimum....

Good luck,

[Chummy]

Thanks :D

[ALLISOMAN280]

HEY BRAD ole randy gonna be upset you talking to jay about motor????????'s :D :D :D :D :D :D :D :D :D :D