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

boredom

stock fpr's are good until 486.5hp

A95lsteggy

buy my synapse fpr its 1 of the best

sweethatch1866

what fpr would you use after 486hp? nasthatch, it seems like you talk alot of shit on everyones post give me two month and im gonna cut your nuts

boredom

Me, personally? I'd go to autozone and get a B&M one for like $50. The stores around my area have them in multiple colors to fit your taste. You could go splurge on a big name company like d2, skunk2, tein, omni, but then you would be paying for hype.

sweethatch1866

i have a erics racing fpr that converts the oem regulator to and adjustable regulator but im being told i need something that will curve the fuel as boost pressure is applied like a fmu. is that correct or does the s300 take care of that?

Daft Punk

Moved to correct section.

c1turbo

who is ur tuner? and if you trust ur tuner you dont need a wideband, when matt shue tuned my car 3 years ago i havnt had a wideband in the car since

Fabrik8

How about taking it down a notch?

So here's the deal. The S300 doesn't have anything to do with the fuel pressure. When you have the tuning done, the injector mapping will be done at the boost levels you want to use, so you have safe fueling at that boost level. Generally, fuel pressure regulators are already referenced to manifold pressure, so they will increase fuel pressure to compensate for boost. The injector mapping is then done to add enough fuel for the extra power under boost.

A wideband isn't needed for anything but tuning.

Snoop 95

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.