11-03-2013, 09:26 AM
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CC Member
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Join Date: Jul 2005
Location: Bartlett,
Ill
Cobra Make, Engine: Everett-Morrison LS1
Posts: 2,448
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Not Ranked
My old days self learned rule of thumb----------starting jet sizes for Holley carbs worked out to be in the region of jet number sorta matching carb CFM ratings----IE-your 750 cfm carb I would begin with around #75 jets in the primaries and more times than not---would start with a 4.5 power valve just to be able to work on the normal driving tune before then advancing into the hard acceleration and WOT stuff----------
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