Thread: Getting more power out of a 307
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07-13-2009 05:36 PM #1
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- Car Year, Make, Model: 63 Chevy Nova
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Does anyone know the stock compression ratio of the 307 with the stock heads? Or atleast the specs on the stock pistons? I want to do some math to find the compression ratio with the smaller 58cc or 53cc heads. Thanks.
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07-13-2009 05:59 PM #2
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- Car Year, Make, Model: '32 Henway
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I suspect you're gonna have to measure everything for yourself. Remember, this motor is 40 years old and has probably gone through multiple changes by multiple owners.
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07-14-2009 05:09 AM #3
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Beautiful Nova, John. If the block has not been decked and it has flat top pistons, your compression ratio is somewhere between 9 and 10:1 with 305 heads. You can use a compression ratio calculator on one of several websites to determine the static compression as well as dynamic compression. Try the Keith Black website if you don't have one bookmarked.
Lynn
'32 3W
There's no 12 step program for stupid!
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