Compression Ratio with 76cc heads on a 5.3?
10-19-2005, 11:34 PM
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Compression Ratio with 76cc heads on a 5.3?
Anyone know what the stock combustion chamber size is on a 2002 5.3 and the corresponding compression ratio? How would I figure out what the compression ratio would be with 76cc combustion chambers. I have the STS turbo, so I figure if I can lower my compression ratio I can run more boost.
10-20-2005, 09:00 AM
#2
Putting it through my compression caculator I come up with 8.27:1 for 76cc chambers on a stock 5.3 with stock MLS gaskets (0.060"). 8.36:1 with a .054" graphite gasket.
Just for referance, my calc comes up with 9.7:1 for a 5.3 where GM advertises it at 9.5:1. 863 heads (4.8/5.3) have between 61-62cc combustion chambers.
Just for referance, my calc comes up with 9.7:1 for a 5.3 where GM advertises it at 9.5:1. 863 heads (4.8/5.3) have between 61-62cc combustion chambers.
Last edited by BigKID; 10-20-2005 at 11:17 PM.
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