317 heads

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03-30-2008, 06:08 PM

JOEFASTZ28

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317 heads

I would like to know what is the differance between 241casting and 317 casting because some guy is selling them to me real cheap

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03-30-2008, 06:50 PM

Shawn MacAnanny

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317s are like 76cc or something right? I know the 317s lower your compression ratio like almost a point.

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03-30-2008, 07:01 PM

NemeSS

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317 have D Exhaust port like ls6/243 heads and 72cc chamber
flow more than 241
241 have 66cc chamber, flow less than 317 O exhaust port
both use 2.00 intake and 1.55 exhaust valve

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03-30-2008, 07:35 PM

MLP00Z28

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Nemess just said it, 317's are good for a turbo, supercharger or big engines since they are 72cc heads, 241 would be better for CR on LS1

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03-30-2008, 11:11 PM

JOEFASTZ28

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thanks guy's for the info i'll stay with my 241 heads then I thought the 317 heads would be better for the car but never mind.

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