Hey guys...I'm looking at dropping the psi on my 99 si to 6-8 lbs for a DD. Right now, I've got a hi-flow fuel rail, 550 injectors, and a walbro fuel pump on a b18 running a run of the mill t3 turbo. Right now my psi is around 11 or 12 and runs a slight bit rich. My real question is this...can I have a shop tune my ecu (p28 tuned with CROME) to get my a/f ratios to where my injectors arent just dumping fuel, and where I'm not totally bogging down my system, or would I need to injectors and rail? ANY help would be great...thanks!

 

Your tuner shop should be able to just tune according to the a/fr's with the crome and get it where you want.