stock fuel pressure regulator

[nbk6kp10]

How much mod can the stock fuel pressure regulator handle. My current mods are cobb SF, ETS TMIC and test pipe w/ stock exhaust. Do you guys think it's ok to use the stock regulator without running lean. The car is running perfectly fine right now, but I'm just kinda worry that the engine is running lean without me knowing.

[Alejo_NIN]

that's what a wideband is for, to be sure when you are running lean...buy one ASAP

[Darth Vader]

Excellent advice(doh) the car already has a wideband from the factory, Brainiac 5.

This car is direct injected so, the old thinking about port fuel injector FPRs doesn't apply. Fuel pressures regularly top 1600 psi and the pump is a mechanical, cam driven one. It has some things in common with a deadhead mechanical fuel injection system, like Enderle or Hillborn, rather than open loop, pulsed port fuel injection of recent times

Get a Dashhawk and see what's going on. I guarantee you that the car is running pig rich at WOT and stoich lean 99% of the rest of the time

[Bravnik]

Until you start upping the boost you should will be fine. I highly recommend a DashHawk or some other means by which you can monitor your car.