Originally posted by Kai
Are you sure it's not the other way around? B18C (P72 series) GS-R heads yeild higher compression (via smaller combustion chamber) then B16/17/18C specR (PR3 series) heads.
Blah... Man, I need to stop posting at such early hours in the morning. I calculated wrong. Acutually...it'll be ~11.3263:1 with a B16/B18C5 head and it'll be about 11.5886:1 with the B18C1 head.
Thanks guys. I don't want to give the wrong numbers.