tomei adjustable fuel pressure regulator help

[Anthony187]

Alright guys need some help with adjusting my tomei fpr.
So ive been working on my s13 sr20det for a few months now and just about finished, but im not sure how too set my fpr. I wanna set it accordingly too my mods which include 810cc injectors, high flow fuel rail, 264 cams, z32maf, gt2871r turbo, fmic and greddy knock off intake manifold. Running a rs enthalpy tune with 2step also. Now with my mods what should I set my fpr too. Can anyone help me out as how and when too set it?

[Dillinja666]

43.5 psi with the vacuum source disconnected from the FPR at idle.
It should drop to 36 or 37 when the vacuum source is hooked back up.

[Mikester]

^^Yep... Slightly above stock. I run 850cc injectors & high flow rail- I keep it at about 36-38psi with vacuum. You don't want to go 'too' high because FP goes up with boost; and most tuners base their maps off relatively stock FP for standard injector/cam/turbo combos like yours.

Another thing you may consider is hotwiring your pump to your battery with a relay. You'd be amazed at how flaky the power can be going to a high-flow pump thru existing OEM wiring. I had MAD FP issues on the dyno- hot-wired the pump with relay & it's been rock-solid ever since. Speaking of- you didn't mention which pump you have... I recommend AEM 300lph pump if you don't already have one.

[Dillinja666]

^^Yep... Slightly above stock. I run 850cc injectors & high flow rail- I keep it at about 36-38psi with vacuum. You don't want to go 'too' high because FP goes up with boost; and most tuners base their maps off relatively stock FP for standard injector/cam/turbo combos like yours.

Another thing you may consider is hotwiring your pump to your battery with a relay. You'd be amazed at how flaky the power can be going to a high-flow pump thru existing OEM wiring. I had MAD FP issues on the dyno- hot-wired the pump with relay & it's been rock-solid ever since. Speaking of- you didn't mention which pump you have... I recommend AEM 300lph pump if you don't already have one.

Good catch, I didn't see fuel pump on the list. Hope he has one since the stocker can't even keep up with the stock boost conditions.

[sr22hatch]

Thanks for the help guys. I also have the aem 300lph fuel pump