Thread: compression ratio
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03-04-2008 02:09 AM #1
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compression ratio
can you use thicker compressed thickness head gaskets to help lower compression ratio a wee bit to use with a blower? obviously not just doing that alone
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03-04-2008 02:16 AM #2
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A thicker head gasket won't lower c.r. by much, but it'll sure screw up the squish on a motor like a small block Chevy. To put any kind of boost in the motor, you need to be at around 8.5:1 or less.
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03-04-2008 08:28 AM #3
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Here's a good summary of atmospheric pressure as it affects CR.
Compression Ratio and Compression
You can see that the ranges overlap greatly, and probably not a good estimation tool for CR when considering boost.
According to the chart 125 psi could indicate some CR between 6.9 and 8.0 to 1.There is no limit to what a man can do . . . if he doesn't mind who gets the credit. (Ronald Reagan)
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03-05-2008 02:24 AM #4
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sweet as. cheers guys
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Is it going into a build, or making a trip to NM?
GM Engine de-coding