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New rebuild compression #'s???

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Old Sep 2, 2003 | 09:14 PM
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1adzam
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From: Richmond, VA
New rebuild compression #'s???
I just got my engine running and did a compression test. What is considered to be good compression in a rebuild with no miles on it?
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Old Sep 2, 2003 | 09:19 PM
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A zero mile rebuild would have really low compression. I dont know the exact numbers.
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Old Sep 2, 2003 | 09:30 PM
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1adzam
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I am right around 100 for front and rear with all even bounces. Thought that was decent considering FSM says low end is 85.
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Old Sep 2, 2003 | 09:33 PM
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From: Hood River oregon
100 would be great, my 60,000 mile motor has 110 PSI bounces.

Jarrett
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Old Sep 2, 2003 | 10:19 PM
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100!!!! WTF!!!! i got NA rotors with the new mazda 2pc seals and all NEW seals all around and i only got mid 80's with 2k on the car...
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Old Sep 2, 2003 | 10:22 PM
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85 is what is normal... It does depend on what crank speed you test it at so keep that in mind.
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Old Sep 2, 2003 | 10:47 PM
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what about 95 on a jspec 87 t2?
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Old Sep 2, 2003 | 11:16 PM
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i'm too scared to test mine............

but i guess if it runs...................
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