Re: Compression ratio converted to PSI

Posted by Maybe,,, on September 06, 2006 at 16:33:36 from (66.228.96.177):

In Reply to: Compression ratio converted to PSI posted by Brad in WI on September 06, 2006 at 02:14:17:

Just a guess,,,,,

100 psi 5 to 1
120 psi 6 to 1
140 psi 7 to 1
160 psi 8 to 1
180 psi 9 to 1
200 psi 10 to 1
220 psi 11 to 1
240 psi 12 to 1
260 psi 13 to 1
280 psi 14 to 1
300 psi 15 to 1

Thats just a guestimated pressure to compression ratio at cranking speed. There is no real way to make it exact, unelss you spec the engine out at 14.2 to 1 etc etc then run a compression test to get a relative psi number at cranking speed.

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