02-27-2009, 07:29 AM
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CC Member
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Join Date: Mar 2004
Cobra Make, Engine: spf 2112 *427 stroker windsor
Posts: 333
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Not Ranked
Priobe;
The reason you would open to 51 is so you can put in a slightly large venturi and still have a tapering bell shape bellow the choke diameter.
This taper allows the signal strength to increase on the augsillery venturi as the air speed increases
With a large venturi and no taper at the bottom half of that venturi the car would have a tendancy to fall flat on its face when the mains are being asked to come on and get stronger.
A smaller air corrector would help also when venturi is larger with less taper.
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