Originally Posted by
sweethatch1866
im building a b20 vtec turbo build. im planing on running 20-25 psi with hondata s300. My question is what kind of fpr do i need to have. or do i need a fmu. also is it really necessary to run a wideband. my injector size is 1000cc with 255 pump bigger fuel rail lines ect. thanks
I've seen stock FPR's handle up to 500 whp. Beyond that, a simple AEM adjustable regulator will suffice. I used one on my built DA and it worked flawlessly. I see alot of HIGH whp cars use the Aeromtive FPR. But the real question is, what power level are you shooting for? You have to ask yourself that before choosing a regulator. Don't base your goal on psi alone, choose a power goal, and your tuner will use whatever psi your setup will give him to make that power goal.
Widebands are not totally necessary, but I strongly recommend you run one. It's always good to see what your AFR's are doing at wide open throttle for peace of mind.