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Old 06-28-2021, 10:21 AM
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zzmac zzmac is offline
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Join Date: Oct 2007
Cobra Make, Engine: Superformance, Roush 402R
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I talked to Holley this morning and he kind of agreed with everyone if I can find someone who can tune it. His guess was the accelerator pump and something else which I forgot. He ruled out the powervalve.

If I go with a new carb he recommended either a 650 or 700 with vacuum secondaries (to add to the confusion). :-) He said mechanical secondaries are recommended for racing.

I'm going to try and find a carb shop closer to home and see if they can tune it.
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