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Old 04-09-2012, 03:57 PM
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Jerry Clayton Jerry Clayton is offline
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Join Date: Jul 2005
Location: Bartlett, Ill
Cobra Make, Engine: Everett-Morrison LS1
Posts: 2,448
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I've modified/blueprinted hundreds of holley type carbs for some big cam engines and generally around .105- .110 will get the idle to around 850 with the butterflies adjusted to where the transfer slots are the little perfect squars---Sometimes I take a .025 drill and reverse broack a little exact hole there with the plates just lightly snugged closed---will need about 1 1/4 turns on idle air screws
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