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Old 10-31-2010, 04:32 PM
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Join Date: May 2004
Location: centralia, IL
Cobra Make, Engine: B&B cobra (sold), Hurricane HMS1002 (sold), Kirkham 289 FIA, (sold) RCR GT 40(sold) SPF GT40 2122(sold) Hurricane HMS2002, (sold) RCR SLC (sold) GTR on the way!
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Default the usual weber stuff, need help

Ok, I think I have this sorted but let me see what you guys think. I was having some popping from the right side pipe. I went from 65 to 60 idle jets with a 100 holder. I was 3/4 turns out. The popping got worse. The plugs were pretty black but the car idled around for a long time. I went back to the 65's and it got a little better. A/F is 12.5 - 13 to 1. I screwed the idle mixture screw out to 1 turn. Still had a little popping but not bad. I screwed the idles out to 1.5 and the a/f is now around 12 to 1 and the popping is gone but black smoke is massive at idle. My though is to go to a 70 idle jet and screw the idles back in to 3/4. Does that make sense?

My timing is set at around 35 degrees max at 3000. I was wondering if the timing could be a factor. I have a duraspark dizzy with vacuum advance.
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