hey suze, just did some working out with a formula i have. why are you running 2" turbo to i/c, then 3" i/c to throttle body? some rough figures, i'd say that it would be best to run the 3" from turbo to i/c, then 2.5" i'c to throttle. that way, you have more room for the heated air from the turbo to the i/c, but when it's cooled by the i/c, you still have a reasonable air velocity by the time it reaches the plenum.
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