compression with lb9 and vortecs? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-27-2009, 10:44 PM
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compression with lb9 and vortecs?

I'm running a 87 iroc 305, lt1 cam, with 906 vortec heads, i know that the 906's have larger chambers than the lb9's 58's, but is there a head gasket i could use so i don't have to mill the heads, but still keep a 9+/1 compression?

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Old 01-28-2009, 05:33 AM
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Trade those 906's for a set of rebuilt and ported 416's,they'll keep your compression up and they'll be more than you'll ever need to feed a street driven small block.
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Old 01-28-2009, 01:18 PM
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i'd like to keep the 906's since they just got rebuilt and i plan on using these heads on the 350 bottom im building in the future.
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Old 01-28-2009, 06:26 PM
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i've read in quite a few forums on 3rdgen.org that the lt1 cam was a good canidate for the lb9 motors. was i missinformed?
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Old 01-29-2009, 10:36 PM
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The LT1 motor also has a cooling system that is designed to cool the heads before the block, allowing a higher compression ratio to be used without detonating. A standard block-first cooling system will require less CR in order to avoid detonation problems.
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