I am trrying to figure out what compression ratio i will be at with my 6.0L heads on my 5.3L motor.

From what I have gathered the stock 5.3L heads are aprox. 61.37cc and the 6.0L heads are 71.24cc.

So if I started with 9.5:1 CR and added roughly 10cc more to my combustion chamber than what CR would I effectively see? Nuthing exact but close would be cool.

 

according to this:
https://ls1tech.com/forums/showthread.php?t=111207

i think you may be looking at somewhere near 7.7:1
I am not positive. look at that site and see what you figure.

 

I think 1cc is equal to about .08 of a point of compression. I could be wrong though.
So your compression would be around 8.7-1 But again I could be wrong.
Also taking .006 off a head equals 1cc.

 

Damn! I didn't think it would go that much but then again i didn't realize there was such a big diff. between the 5.3L and 6.0L heads. No wonder you bastards make so much more power than us with a cam!

Maybe I'll call Craig at GTP and see what he thinks. The scary part is we are also doing the thicker head gaskets so if I somehow get down to the 8.7:1 range then drop .2 I would almost be in the 8.5:1 area. Hmmm that is damn near optimum for a high boost motor

Heres to wishful thinkin