I know the comp ratio changes when switching heads, I never said it didn't...all I said, is that if you have a 10.1 compression with using a B16 head, you aren't going to be anywhere NEAR 12:1 with just changing to a GSR head, especially when using a headgasket that is twice the thickness of the stock gasaket.

if you will look in the first thread i meantion a stocke oem HG, them i mentioned that I was going to switch to a .060 hg ?