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MS4 , LS6 heads , cometic gaskets

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Old Jan 6, 2009 | 06:01 AM
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Default MS4 , LS6 heads , cometic gaskets

hi , my buddy have 2002 trans am m6 , he want to install ms4 112 LSA with stock 243LS6 heads and cometic heads gaskets thickness .051 , there will be problems ? can he run with cometics .040 ?
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Old Jan 6, 2009 | 06:04 AM
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thanks man for this point i need to now to
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Old Jan 6, 2009 | 09:48 AM
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Are you asking for P to V clearance? That's probably a question better answered by TSP in the internal section not the nitrous section. Maybe a mod can move the thread for you.

Nick
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Old Jan 8, 2009 | 10:08 AM
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Originally Posted by PONTIAC SLP
hi , my buddy have 2002 trans am m6 , he want to install ms4 112 LSA with stock 243LS6 heads and cometic heads gaskets thickness .051 , there will be problems ? can he run with cometics .040 ?
The answer is no to .040.

Im running a MS4, 243s and stock gm MLS gaskets. the Heads will work fine, cam will too. Piston to valve is VERY close assuming a stock .055 compressed gasket is used.

If those 243's have been milled at all, You will have to flycut no getting arround it either.

If they havent and you want this to be at all safe without flycutting, youll need to run a stock gm MLS gasket. they are 40 for both no need for cometics.
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Old Jan 8, 2009 | 10:17 AM
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Originally Posted by vetteboyc5
The answer is no to .040.

Im running a MS4, 243s and stock gm MLS gaskets. the Heads will work fine, cam will too. Piston to valve is VERY close assuming a stock .055 compressed gasket is used.

If those 243's have been milled at all, You will have to flycut no getting arround it either.

If they havent and you want this to be at all safe without flycutting, youll need to run a stock gm MLS gasket. they are 40 for both no need for cometics.

thanks a lot , what is your mods ? how many rwhp did u get at the dyno ?

Last edited by PONTIAC SLP; Jan 8, 2009 at 10:22 AM.
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Old Jan 8, 2009 | 10:19 AM
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Originally Posted by Nick@HSW
Are you asking for P to V clearance? That's probably a question better answered by TSP in the internal section not the nitrous section. Maybe a mod can move the thread for you.

Nick
yes PTV , i was wrong when i wrote this thread here , i did't note that , BTW thanks
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Old Jan 11, 2009 | 12:22 PM
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awsome i was wondering the same thing
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Old Jan 11, 2009 | 02:22 PM
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Yep, GM head gaskets are the way to go. Never heard of anyone blowin them, i've seen a lot of cometics blown.
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