Thread: 428 Carb Set up
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Old 10-22-2003, 08:08 AM
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CJ428CJ CJ428CJ is offline
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Join Date: Dec 2000
Location: Livermore, CA
Cobra Make, Engine: ERA #629, BBM Side Oiler Block, 482ci, Richmond 5 speed
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Chaplin,

If you're happy with the cam other than the stumble you refer to, I'd buy and install a new carb before I replaced the cam. I run a fairly lopey cam (Isky .565 lift, 280 adv duration, 232@.050, 108 LC). I pull only about 4 inches of vacuum at idle. I had a Holley 750 DP on it that I never could get to run really well. I pulled it and replaced it with a Demon 750 DP. I had to change the power valve to a 3 inch valve and I reduced the jets by one size. It runs great now with no hesitation.

Bottom line is, your problem seems to be a carb problem and not a cam problem. Lots of other people run cams with the same or less vacuum than you have. And installing a new carb is sooooo much easier than replacing the cam and it's not much more money.

Chris
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