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May 21st, 2008, 11:21 PM
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#1 |
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Enthusiast
Join Date: Oct 2006
Location: new england
Posts: 822
 iTrader: 0 reviews
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compression check
i got 140psi for the highest and 130psi for the lowest cylinder. what is it suppose to be when it was new. the motor has 126k on the clock.
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85 svo. work in progress 
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May 21st, 2008, 11:35 PM
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#2 |
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Enthusiast
1983 mustang lx
Join Date: Apr 2008
Posts: 504
iTrader: 0 reviews
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i think the good rule of thumb goes the compression of all the cylinders has to be within 15-20% of the cylinder with the most psi. if im wrong, others will chime in.
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May 22nd, 2008, 09:51 AM
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#3 | |
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Enthusiast
1988 Mustang GT
N/A
Join Date: Nov 2006
Location: Florida
Posts: 631
iTrader: 0 reviews
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Just as 83GT said, except I thought it was 10-15%
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May 22nd, 2008, 08:41 PM
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#4 |
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Enthusiast
1983 mustang lx
Join Date: Apr 2008
Posts: 504
iTrader: 0 reviews
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it might be 10-15% i knew 15% for sure but i didnt know if the other tolerance was higher or lower
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