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Old 04-14-2008, 10:52 AM
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Cashburn Cashburn is offline
Backdraft Racing Dealer
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Join Date: Dec 2004
Location: North Haven, CT
Cobra Make, Engine: Backdraft Racing
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Hello,
You can change the primary jets to eliminate the stumble. In our area/elevation we up the jets a couple of sizes. Typically the carbs show up with 68's on the primary. We usually jump to 71's sometimes 72's to get rid of the stumble. You can also increase the squirter, but this sometimes will lessen it but not eliminate it. Check to see if you have a 50cc accel pump or 30cc. The lightness of the car makes it a bit more difficult to dial in. Don't get rid of the vaccuum secondaries IMHO. The mechanical is better for a race car, but on the street a properly dialed in vaccuum secondary responds better. Check on the jets and see what you got.....
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