LQ4 Compression, piston selection

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Jan 30, 2009 | 05:24 PM

Blu99T/A

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LQ4 Compression, piston selection

Can anyone help me figure out what pistons I need to run with this setup to make or get as close as possible to 11:1 compression. I am thinking flattops with -2cc valve reliefs.

LQ4 block bored .30 over
PRC 5.3 stage 2.5 heads 220cc
Chamber size: 62.5cc
Stock GM gasket .52
4.030 bore
3.622 stroke
Cam is 230/232 .613/.595 on 111+1LSA

Thank you!

Last edited by Blu99T/A; Jan 30, 2009 at 08:23 PM.

Jan 30, 2009 | 07:35 PM

XtraCajunSS

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You are correct, with a stock GM MLS gasket of .052" thickness, a flat top -2cc at 0 deck will net you right at 11:1.

Shane

Jan 30, 2009 | 08:24 PM

Blu99T/A

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Quote:

Originally Posted by XtraCajunSS

You are correct, with a stock GM MLS gasket of .052" thickness, a flat top -2cc at 0 deck will net you right at 11:1.

Shane

Thank you!
Sean

Jan 30, 2009 | 09:44 PM

pdbq

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That is pretty much what I'm doing, except that I'll be using an MS3 cam. Static compression will be exactly at 11:1. Hope to make at least 400 rwhp through a stalled auto... I do foresee a lot of tire shredding in the future...

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