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Old 05-16-2007, 08:23 PM
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SuperHart SuperHart is offline
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Join Date: Mar 2001
Location: Cinnaminson, NJ
Cobra Make, Engine: Cobra Fibercraft Bodies 427 S/C, 351W disguised as a 427.
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Default Anyone Using Dual Holley #8007 carbs?

I need some input from anyone using Holley #8007 390 cfm carbs on a dual quad setup, especially if the engine is a 351W. I'm looking for jet #s, mixture screw settings, etc. Presently I am running the factory jets #54, factory vacuum secondary springs and have the idle mix screws set at 3/4 turn out from full seat on both carbs. If I try the factory recommended setting of 1 1/2 turns out the mix is much too rich, any less than 3/4 turn and performance suffers.

Just wondering if anyone else running these carbs can offer their input about jets and idle screw settings. Thanks.
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