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Old 08-22-2008, 06:29 AM
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Originally Posted by kleen56
I'm running a 4777 650 cfm Holley. The carb runs well, linkage adjusted correctly, jetting is fine. When I crack the throttle, I get a studder but then it clears. I was told to replace the discharge nozzles to correct this problem. I know I have 25 nozzles in the primary and 32 in the secondary. Any suggestions on which way to go as far as sizing? I've already dont the accelerator cam routine. Carb is running great except for the stumble when the throttle is cracked quickly.

It is a studder or a small bog. Have you checked the accelerator pump adjustment? May be that you have just a little clearance and the shot from the accelerator pump is coming just a half second to late. Just a thought.

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