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Jim2 Jim2 is offline
7.0:1 > 11.3:1
 
Join Date: Oct 2003
Location: Calgary
Posts: 1,816
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GT2Evo, if you encounter a drivability problem at low throttle openings simply alter the geometry of the throttle arm. Though I find mine to be more sensitive than the stock TB it's still got sufficient modulation down low.

My rationale for 76mm is to achieve the same cross section area as the ID of the tubing leading up to the TB while accounting for the lost area of the butterfly shaft. You certainly don't need to get this picky when the objective is simply to reduce inlet stream losses. Not sure which intake manifold you are dealing with but I had to open mine up, it was the same size opening at the original TB.
Old 08-05-2008, 08:09 AM
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