[Mk2] [Turbo] Fuel pump and FPR

[afennell]

Happy christmas everyone.

Do you need to upgrade the FPR when installing a larger fuel pump?

[shinny]

Good question.. interested in the answer

[C35Rob]

no, the stock regulator is fine up to the biggest injectors you can fit in the rail (denso/sard 850's) and the pump you'd need to feed them (walbro 255) - so basically unless you're going for huge power with a deadhead or top feed rail there's no need to "upgrade" the regulator, if your original is in good working order.


From the Wolfkatz website:

4) When should I replace my stock FPR?

If your stock fuel pump resistor pack is still in place, boost levels stay below 20psi, and you do not have a pump larger than the Supra Gen IV or Walbro 255, the stock FPR is fine. We sell the Aeromotive brand of regulators, but there are others out there as well that work just fine. We also sell "fitting kits" with each rail type to help you install these regulators in your car!

5) When should I abandon the stock Supply and Return Lines?

At around 450 whp, 880 cc/min or 85 lb/hr injectors start to run out of steam. As you go to a larger injector, you will not be able to supply them with just one Walbro 255 or one Supra Gen IV pump. Thus, this is when more drastic customization is really required. WolfKatz has plenty of ideas about how to go larger, just drop us a line!

[afennell]

Cool,

So i can upgrade the pump (Walbro 255)
Run standard injectors and fpr for a while.

Then,

Upgrade the injectors and ECU and still be fine with out changing the fpr?