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LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

max compression for pump gas?

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Old Sep 28, 2003 | 12:47 AM
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marshall93z
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max compression for pump gas?
just wondering what the max compression for pump gas would be...maybe not the ragged edge but just a good high compression number.
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Old Sep 29, 2003 | 09:30 AM
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marshall93z
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no one has an opinion on this?
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Old Sep 29, 2003 | 10:14 AM
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I run 11.5-1 with pump gas. I think the max would be 12.5-1 but that would depend on the cam, plugs ,etc.

Matt
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Old Sep 29, 2003 | 11:17 AM
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marshall93z
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what does the cam have to do with the compression?
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Old Sep 29, 2003 | 11:32 AM
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InjectedSS
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Originally posted by marshall93z
what does the cam have to do with the compression?
Bigger cam's tend to bleed off cyl pressure, hence allowing you to run higher compression's.

Either way I think 12.5:1 is the MOST I think you could go on the street with PUMP GAS. Even then that's pushing it.
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