Compression Ratio

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Jul 27, 2004 | 06:24 PM

CRAWLIN

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From: Indiana

Compression Ratio

What can I do to a 241 LS1 casting head with 2.02/1.57 valves to obtain 11.1 compression ratio using a stock size head gasket and stock 346 bottom end. And what CC would these heads turn out to be??

Done alot of reading, but couldnt answer my question.

Thanks

Jul 27, 2004 | 06:39 PM

PREDATOR-Z

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From: BFE

They would have to be milled around to .035 for 61 cc for a 11.1:1 CR

Jul 27, 2004 | 06:58 PM

CRAWLIN

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From: Indiana

Preditor sorry to question your knowledge, but are you 100% sure, please read my post again and answer. This question has alot of bearing riding on it.

Milling .030 wouldnt get me to a 62cc 11.1 compression ratio with a stock .054 head gasket???

Thank you very much for any and all info!!!!!

Last edited by CRAWLIN; Jul 27, 2004 at 08:39 PM.

Jul 27, 2004 | 11:03 PM

jrp

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From: Valencia, Ca

milling .030 puts your chamber at 62.38 and with the .054 gasket nets you 10.86CR. to get 11.1 you'll need to mill .040, that puts you at 11.06CR.

i'd just as well mill .030 and run a .043 gasket, gets you 11.16Cr