08-08-2008, 08:41 AM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Las Vegas,
NV
Cobra Make, Engine: ERA 427 SO
Posts: 1,126
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Not Ranked
Mike, I had the same stumbling problem when I put 1850's on my car, until I lowered the float levels on the rear carbs to account for the 9 degree forward rake on the manifold...like 2 1/4 turns lower (but do the math on the thread pitch and angle to determine the actual # of turns). No problem anymore, and dyno runs indicate A/F is right on. Another "trick" you might want to consider is putting a short piece of rubber hose on the vent pipe to raise the height, so the fuel slosh won't come out the top as easily.
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Ken
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