02-04-2004, 12:26 AM
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CC Member
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Join Date: Apr 2000
Location: Leesburg, VA USA,
VA
Cobra Make, Engine: Contemporary, 427 FE Center Oiler w/ 48 IDA Webers
Posts: 238
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Not Ranked
Tony et al:
My friend and I had the same discussion about stack height and the possible advantages when we did the engine dyno pulls on my new engine. He recently sent me this chart from the TWM website:
If you can read the chart, it shows a 5 hp decrease at about 8200 rpm with the tall horns! I use a 6000 rpm rev limiter on my car, so I think I'll just keep my shorter stacks for sure.
(I realize that the TWM chart is for their EFI look alikes so I don't know if there is a difference with real Webers or not. I suspect that it would be marginal at best.) From what I understand, the shape of the lip makes more difference than the height. Maybe Cal Metal will read this and chime in. He would know for sure.  |
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