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Old 06-29-2001, 04:55 PM
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Sorry to trouble you guys for simple information, but I am away from my manuals and having the car compression-tested right after work. Do you know what the spec. PSI is for the M102.985? Thanks! Andrew Seidel.
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Old 06-29-2001, 05:28 PM
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The 1985/86 engines had 8/1 compression so the readings should be around 125/135p@sqin. The 1987 & later engines were 9/1 compression. That is one reason the hp ratings went to 130 in 1987
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Old 06-29-2001, 05:31 PM
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Thanks! That's fast service! My 560SEC was 90 to 97% of original spec. @ 200k. Cheers, Andrew Seidel.
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