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Old 08-12-2012, 09:05 AM
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If you want to lean on it hard, with boost using pump gas you want a low low compression ratio.
7:1 to 7.5:1 and big ring end gaps.
Engine compression testers have a pressure hold/release valve. The gauge will not drop unless you press the release valve.

Last edited by F-BIRD'88; 08-12-2012 at 09:17 AM.
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