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Compression

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Old 09-01-10, 12:54 PM
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Compression
What should compression be on a 87 turbo 2? Im hearing different things from different people.
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Old 09-01-10, 04:14 PM
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Compression or compression ratio? Compression numbers per chamber should hopefully be 100+ psi @ 250 RPM (cranking speed w/ charged battery). Minimum factory spec is about 80 psi, but that is the bottom of the barrel.

The CR on an S4 TII engine is 8.5:1.
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Old 09-01-10, 07:40 PM
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The guy told me its around 90psi per rotor.
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Old 09-02-10, 10:50 AM
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Engine, Not Motor

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90 PSI is fine.

Realistically, does the engine run well? Does it make decent power and not suck down fuel? If yes, then compression is fine.
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Old 09-02-10, 12:26 PM
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Allright, thanks a lot man!
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