lowering compression for a turbo

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Sep 28, 2006 | 11:19 AM

1SickWS6

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From: Henderson

Octane VS. compression

Can someone verify how thick stock headgaskets are? .04 or .05?? With 9.55 compression how high would I be able to boost on regular premium? I figured after calculating that I could run 8.5 lbs. of boost and maintain a static compression ratio of 12.0 to 1 which I believe should be safe on 91 octane. How high of compression should I be able to run on 100 octane? On 13lbs. I calculated a compression of 13.1 to 1. Also does anyone have a similar set-up? I am interested to see what kind of numbers I will be around. Thanks!

Last edited by 1SickWS6; Sep 29, 2006 at 10:40 AM. Reason: answered own question

Sep 29, 2006 | 10:46 AM

1SickWS6

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From: Henderson

Do boosted cars do okay with cometic head gaskets??

Sep 30, 2006 | 06:58 PM

Dave D

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From: Pahrump, NV

Romie, do you have meth injection, or only the FMIC? If you add meth, it will allow you to run significantly more compression with that setup vs. just an FMIC.

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