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Old May 11, 2003 | 11:08 AM
  #1  
mhgleitz's Avatar
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From: Louisville, KY, USA
Default compression equation

what are the equations needed to calculate compression ratios?
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Old May 11, 2003 | 11:40 AM
  #2  
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From: la, ca, usa
Default Re: compression equation (mhgleitz)

cylindrical volume equation? area of base time height. do it twice at bottom dead center and top dead center. then measure of volume at bdc over the measure of volume at tdc. i hope thats what ur asking for.
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Old May 11, 2003 | 11:43 AM
  #3  
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From: Boo, did I scare you, US
Default Re: compression equation (XLEntropy)

basically the head needs to come off, or you need to know the exact demensions of your pistons, and your head bowl, combined with what type of head gasket you have.
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Old May 13, 2003 | 06:43 AM
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From: land of the sheep, home of the hypocrite
Default Re: compression equation (mhgleitz)

These have been posted several times...
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Old May 13, 2003 | 10:38 AM
  #5  
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From: Montgomery, AL, US
Default Re: compression equation (flyrod)

Are you trying to take compressoin test numbers (i.e. 215) and see what they convert to (i.e. 10.0:1)? If so i have a chart i can email you or to someone who can post pics.
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Old May 13, 2003 | 11:03 AM
  #6  
JG Luder's Avatar
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From: Boo, did I scare you, US
Default Re: compression equation (str8rcn)

It wouldn't work as well as you think. Cause you still have to take into account leakdown, and other issues that make a compression test not 100% accurate.
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Old May 13, 2003 | 11:09 AM
  #7  
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From: land of the sheep, home of the hypocrite
Default Re: compression equation (Lone Luder)

There are lots of threads on this. Here is one with some calculations:

https://honda-tech.com/zerothread?id=438456
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