Havent done any exact calcultions on it but (just test and tune) oure 4" FMIC and plumming were a restriction on oure car (also extra weight) and changing pullies wasnt an option since the F1 was over its limits, note i wrote E85( = 109 octan RON), É85 takes a lot of heat from the incoming air to evaporate the E85, aprox 3.5 times more energy/heat compared to gas so the combustionchamber temperatur difference isnt so big as it looks like when you compare IAT.

Agree about IC vs meth inj on a streetcar, is an easy choice if you run on gas, E85 would be another thing, If you stay araound 10-12 psi on a 9,0 comp engine there shouldnt be need for meth if you runníng E85.

 

I've done some testing on my car with and without the intercooler. It appears to become a pretty big restriction at the higher airflow ranges. I would guess at about 500rwhp it becomes a pretty big restriction. After speaking with the guy at SDCE he said the 4 inch FMIC that everybody uses on their fbody doesn't have enough crossectional area. He recommended an up flow intercooler and said it would flow much better. If I raced alot I would ditch the intercooler altogether and up the meth.