04-06-2011, 06:32 PM
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CC Member
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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!
Posts: 1,288
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Not Ranked
one more Weber question
Things are really shaping up. I have gotten very close to having a happy engine with Weber's. I had a lean stumble between 2000 and 3000 rpms. I went from a 60 to a 65 idle jet. I seemed to run great, no stumble and good acceleration but my LM1 was reading really rich like 10-10.5 to 1 a/f. I went back to the 60 and the ratio climbed to 12.5 to one at an easy cruise which was good. When I hit the gas to check acceleration, I'm back to the lean spike/stumble. I have a 40 exhaust jet in the bowls now. Should I just put the 65 back in and run rich or should I switch to a 00 bypass. I don't have any 00 exhaust jets so I need to order them if you think that is the issue.
My main jets are 160's in f7 tubes
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