Originally posted by FluxCapacitor
I would imagine that the car is running wacked out rich because of the fpr. I would also assume that the injectors are probably maxing out too because they're stock and you have a 16g. My brother had that set up and his car would hit fuel cut very quickly... except he wasn't doing anything with his fuel pressure. You are going to need some sort of engine management to run the larger turbo or you are going to have sucking gas problems and that's the bottom line.

Why would a FPR make it run rich, providing its set at stock fuel pressure values?? Unless the stock FPR isnt a 1:1 rising rate FPR, then i dont see how that has any effect. I have hit around 15 psi boost so far, and has never hit fuel cut, in fact, its running pretty rich at that. I can run 18 psi on my S16G on my rs, with 440cc injectors, and those are prety much maxed, so the fuel is there, too much there lol..I know i need some fuel management of some nature, i just want to get it halfway decent with what i have for the time being. If i'm running stock injectors, with stock fuel pressure, idle/cruise fuel trims should be like stock, doesnt really matter what turbo is on it, esp not like there is THAT much difference between a 14B and 16G..a 14b to like an FP Red, ok lol..

I'm running roughly 12-15 psi MORE fuel pressure at idle than what it calls for stock, even then fuel trim data says it needs more fuel? So closed loop, computer says its a bit lean, but boost is super rich? Doesnt make sense..