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ChadS
12-18-2004 14:17:05
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Re: I.H. Carb Venturi questions.. in reply to AC, 12-18-2004 07:34:09
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AC, Stock to stock, in the shebler model carb on the Super H-450, the torque venturi is from the Super M in the M-450, the big cubes love the 450 venturi, the 6 cyl loses torque and HP in the 4 cyl engines. if you have a very very strong torque curve, and want to knock some out so it bites a bit better, run the 6 cyl venturi, (on bigger hp engines of course not stockers) The vaccum rate in the manifolds are alot different from the 6 cyls, vs the 4 cyls. Both, take a different breath in the intake. On modified H engines,, like yours, the M venturi would work great, good torque, and good 540 hp, the 350 venturi, would give it a bit more lugging power, under 540, but 540 power is lost from being too dense of mixture. Not enough air, too much fuel. But it lives off the compression to keep running, and holds torque better. but thats for finding peak torque in your engine. Get a vaccum guage and look for the highest, reading at wide open throttle. the more vaccum pressure in the intake,, the better quality draw the engine takes in to the cyl chamber. ChadS
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