Compression Ratio with Forged Internals

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11-02-2009, 03:20 PM

seldon

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Compression Ratio with Forged Internals

hey i'm thinking about getting the brian crower stroker kit for my ls/vtec. I was wondering whats the highest compression ratio i can safely run with 91 octane, is it still 11.5 with forged internals?

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11-02-2009, 03:25 PM

non-VTEC

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Re: Compression Ratio with Forged Internals

11.5:1 on 91oct should be ok as long as your tune it good.

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11-02-2009, 03:32 PM

all-mtr-teg

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Re: Compression Ratio with Forged Internals

I've seen 12:1 on 91 gas, its on in the tune. By the way, I pm'ed you.

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11-03-2009, 05:30 AM

QUICK8CIVIC

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Re: Compression Ratio with Forged Internals

Though CR is dependent on fuel octane used, use of forged pistons allow a little higher CR since it dissipates heat faster, help lower detonation threshold of the 91oct fuel..12:1 CR on 91-93oct are fine with good tuning and well built cooling system.