Fast falcon: I read about the exhaust being the limiting factor as well but I'm hoping with my bigger td05 turbos, that doesn't hold true currently (with stock TB). If you do the math on two 2.5" pipes merging to a 3.5" pipe, it's 9.8 merging into 9.6... Can't get much closer. The ID of my MAF is 3.5" (3.75" z06 MAF) and so now with my dinky 60mm TB it's a big time restriction. I do have concern with the air velocity being too slow, but under pressure I'm not sure if that's just a moot point really. Also, we all know that DSM's can run significantly more boost pressure than we can, even from factory, and I wonder if our TB being too small is a contributing factor. None of the guys that mess with this stuff post on here much, or if they do I just haven't seen them post about it.

ABM: I'm not sure what a throttle cam is but ill do some research. There may be some adjustments in the ecu that can help as well. With flash able anything is possible... Right? Hahaha

Idk anything about the s90. I am leaning towards no, but I can't be sure.