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Old 04-28-2011, 09:07 PM
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how will a stock bottom end sbc handle 11.5 to 1 compression

i have a 327 with a stock bottom end. ive installed cam, intake, aluminum heads. the issue is with 64 cc heads it was at 10 to 1. now the heads i went with are 58cc n im thinking my comression is around 11.5 to 1. this bottom end is just a temp. parts holder but how will stock rods, crank etc hold up? if not pushed to hard wil it hold?

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Old 04-28-2011, 09:16 PM
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Chevrolet built 327's with 11.00:1 static compression ratio many moons ago and controlled cylinder pressure with camshaft timing events. I don't think it's the cylinder pressure that will do you in as much as it is excessive rpm's.
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Old 04-28-2011, 09:17 PM
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Comp ratio

If the parts stated are in good condition higher compression won't hurt anything as long as you don't get into detonation. I don't think your CR is as high as you think...more like 10.8:1. Run 91 octane and you shouldn't have any trouble.

Ron
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