So, I was doin some reading, and started to wonder about how to size intercooler pipe and the throttle body. One point that was made was, to keep good throttle response through out the throttle angle, you need to keep the throttle body size close to the charge pipe size (a lil bit bigger is best). This makes sence, because it would keep the intake velocity up, but is it true? Another thing I was thinkin about is, with my mid 400 horse power goal, would coupling a 2.5" charge pipe to the 2" outlet on my turbo be reasonable? I see plenty of cars makin more than 400 horse using 2.5" piping, so I know that a 2.5" pipe can flow enough volume to support my goal. But, will that extra half inch of diameter right off the snail of the turbo cause a pressure drop that will kill power output? Should I maybe run 2" from the turbo to the IC, then 2.5" from the IC to a 65mm (2.559") throttle body? Im just lookin for tips on gettin the best flow I can, and questioning rather or not the "typical" setup is good enough in my case. Thanks for any info.