Compression Ratio Help Please

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Jan 13, 2006 | 08:33 AM

George V

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Joined: Mar 2005

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From: Sherman CT

Compression Ratio Help Please

I have a stock 02 bottom end LS1. I will be installing GMPP (65cc now) heads with stock gaskets and would like a CR of 11:1. What should the CC of the heads be? I figured 62cc by using a proportion, but the calculator is giving me a different figure.

I will also be installing a comp 222/224 .566/.568 on a 112.

1. What should the pushrod length be?
2. Any concerns with PV clearance with this set up?
3. Is 11:1 CR too high

Jan 13, 2006 | 08:53 AM

SideStep

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If all you want to change is the chamber size to get to your goal 11:1, 62cc will get you 10.95:1... assuming you are .007 out of the hole and you are using the factory composite gasket.