Quote Originally Posted by jetmech View Post
Just curious here, but what heads would one use to get about 9.5:1 CR on an LS1? 317's maybe? And what is the stock CR on an LS1?
I am going to save all of us a lot of trouble. Here is a compression calculator. Google can answer any questions you have about the information it asks for.

http://www.csgnetwork.com/compcalc.html