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Old 08-12-2004, 01:31 PM
cojohnso cojohnso is offline
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Holley uses a formula: Engine size (CID) x maximum RPM / 3456 = CFM to calculate carb needs. If your engine needs more CFM then a single carb can provide then dual quads may be your answer. I would recommend a faster signal 4 barrel. (Dominator series for example.) Just adding more carb will not increase horse power alone. The engine can only suck in so much. By raising the cam and valve size you can increase your fuel and air acceptance thus larger carburetor(s) is needed, with increased exhaust flow. (usually bigger pipes)

Hope this helps
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