Originally Posted by
glhs875
Why don't you build a custom larger upper plenum, with no added runner length over what the lower piece has? Then on the lower piece, port the runners at the plenum to achieve a velocity stack design. And also try to center the throttle body inlet at the plenum if possible for more equal flow distribution. I have noticed that cylinder #1 gets the most air, then #2, #3,  on a 2 piece intake. There not that far off from each other, but there is a difference. From my findings, the 1 piece, with the way the plenum is designed seems to be better in this department. But seriously modifying the 1 piece could change the flow distribution if your not careful. I've not yet decided if there is much of a difference between the 1 piece or 2 piece, at the stock throttle body size levels. But I have noticed the 2 piece having a little better throttle response. You have a great combo going Aaron, but now it's time to get down to the nitty gritty. One thing I would do, is to see how much of a pressure drop before & after the cooler you actually do have @ 26psi.