Thread: What compression ratio?
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04-29-2012 05:01 PM #1
What compression ratio?
Hello, I'm new here. I have a 427 I took out of a 68 corvette. Had it in my 55 chevy for quite a while. It is a 390hp with 10.25 stock compression with oval port closed chamber heads. I was wondering what the compression would be if I installed a set of 69 open chamber large port heads that I have laying around. I would like to drop the compression down to 9.25 to deal with the crummy gas at the pump. I have a few large port intakes laying around so if just changing the heads would get me where I want to go that would be great.
I got the Skyjacker hydro shocks on and they are as soft as I'm going to get. It still rides kind of firm but better. One of the main issues is the front is about a 1/4 off it's bump stop, the lack...
Stude M5 build