Thread: compression ratio for supercharged xr4i
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Old Dec 30, 2016 | 01:13 PM
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carbon1993
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Joined: Feb 2013
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From: Netherlands
Default compression ratio for supercharged xr4i
What is the best compression ratio for a 3.1 cologne v6.

i want to run a sprintex supercharger. But my engine has a compression ratio of 9.9:1 now.

Is this to high to run a intercooled supercharger at 7/8PSI?
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