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What is a good compression range?

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Old Nov 9, 2004 | 03:07 PM
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JDGJr85GSLSE's Avatar
JDGJr85GSLSE
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JDGJr
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From: 7400 ft plus jack stands
Question What is a good compression range?
Stock FI 13b in GSL SE.

And how do I compensate for being at 5000 feet altitude?

thanks
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Old Nov 9, 2004 | 08:39 PM
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purple82
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From: Issaquah, WA
Divide your tested number by 0.8617 to compare to sea level compression ratios.
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Old Nov 10, 2004 | 06:48 AM
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Rx7carl
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Sea Level per Mazda is 105-150psi on a stock port engine. In my experience anything below 70 wont even start on its own.
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