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which head gaskets to lower compression?

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Old 07-14-2010, 07:07 PM
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Default which head gaskets to lower compression?
Im using an iron 346 fully forged with a set of stock 317s the compression of the motor alone is 10.1 but ill be putting the stock 317s on and i need the lowest compression possible.. which gaskets do you guys reccomend?

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Old 07-14-2010, 07:52 PM
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what combustion chamber gives you the 10.0 compression, 62-66-72cc chambers
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Old 07-14-2010, 07:57 PM
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The 317 heads will get you down to around 9.4 to 1 if you use a stock thickness head gasket. Stock thickness is about .052 compressed. Be sure to use a MLS style head gasket and it will need to be for the 6.0 open chamber heads.
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Old 07-14-2010, 09:23 PM
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So I can't use stock ls1 style head gaskets if I'm using 317s? What if I want my compression even lower then a 9.4?
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Old 07-15-2010, 11:12 AM
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Originally Posted by Busy Mopper
So I can't use stock ls1 style head gaskets if I'm using 317s? What if I want my compression even lower then a 9.4?
why so low?
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Old 07-15-2010, 02:05 PM
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Would like reall low 9s for the turbo
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Old 07-15-2010, 02:34 PM
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Hmm well my motor is 9.9:1 and has been fine with 13psi from my procharger. Getting ready for a turbo build now and gonna see how it likes 14 psi
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Old 07-15-2010, 03:14 PM
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**** Im at 9.5ish:1 and the most octane we have in alaska is 90. Im doing fine.
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