LS1TECH - View Single Post - LS1 head combustion chamber CC volume vs CR

Tin Indian · 10-31-2003, 08:24 PM

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Head CC volume vs Compression Ratio:
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The below CR numbers are with the stock GM 5.7L displacement LS1 graphite head gaskets installed.

Installing the thicker 2003 GM MLS head gaskets will decrease your compression ratio by approx 0.1 - 0.2

72.27cc = 9.1 CR
71.71cc = 9.2 CR
71.05cc = 9.3 CR
70.59cc = 9.4 CR
70.03cc = 9.5 CR
69.74cc = 9.6 CR
68.91cc = 9.7 CR
68.35cc = 9.8 CR
67.79cc = 9.9 CR
67.23cc = 10.0 CR
66.67cc = 10.1 CR (stock LS1 head spec)
66.11cc = 10.2 CR
65.55cc = 10.3 CR
64.99cc = 10.4 CR
64.43cc = 10.5 CR (stock LS6 head spec)
63.87cc = 10.6 CR
63.31cc = 10.7 CR
62.75cc = 10.8 CR
62.19cc = 10.9 CR
61.63cc = 11.0 CR
61.07cc = 11.1 CR
60.51cc = 11.2 CR
59.95cc = 11.3 CR
59.39cc = 11.4 CR
58.83cc = 11.5 CR
58.27cc = 11.6 CR
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10-31-2003, 08:24 PM	#1
Tin Indian TECH Fanatic Trader Rating: 0 Join Date: Nov 2001 Location: Desert Southwest Posts: 1,952	LS1 head combustion chamber CC volume vs CR . Head CC volume vs Compression Ratio: ______________________________________________ The below CR numbers are with the stock GM 5.7L displacement LS1 graphite head gaskets installed. Installing the thicker 2003 GM MLS head gaskets will decrease your compression ratio by approx 0.1 - 0.2 72.27cc = 9.1 CR 71.71cc = 9.2 CR 71.05cc = 9.3 CR 70.59cc = 9.4 CR 70.03cc = 9.5 CR 69.74cc = 9.6 CR 68.91cc = 9.7 CR 68.35cc = 9.8 CR 67.79cc = 9.9 CR 67.23cc = 10.0 CR 66.67cc = 10.1 CR (stock LS1 head spec) 66.11cc = 10.2 CR 65.55cc = 10.3 CR 64.99cc = 10.4 CR 64.43cc = 10.5 CR (stock LS6 head spec) 63.87cc = 10.6 CR 63.31cc = 10.7 CR 62.75cc = 10.8 CR 62.19cc = 10.9 CR 61.63cc = 11.0 CR 61.07cc = 11.1 CR 60.51cc = 11.2 CR 59.95cc = 11.3 CR 59.39cc = 11.4 CR 58.83cc = 11.5 CR 58.27cc = 11.6 CR . Last edited by Tin Indian; 01-01-2004 at 12:35 PM..