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post #1 of 3 (permalink) Old 09-05-04, 06:34 AM Thread Starter
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4.1ohv PSI/compression

Hello, I'm just wondering how much PSI one could put onto an xf motor?
What would be ideal compression for say 10psi?

Thank you

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post #2 of 3 (permalink) Old 09-05-04, 05:14 PM
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Re: 4.1ohv PSI/compression

Those motors run quite low comp...I think around 8.8 to 1...
10 Lp should be o/k with good tune and not much advance during peak torque...
Most std turbo motors run around 8 Lp boost...

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post #3 of 3 (permalink) Old 09-06-04, 02:02 AM
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Re: 4.1ohv PSI/compression

More factors go into compression ratio than boost- ie using intercooler, advancing/retarding timing, fuel used, future plans etc.
But around 8 seems to be the go.
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