just converted my car back to completely stock ITR motor with JDM header from a fully built turbo setup. the car was making 450whp or so on just the walbro with 1000's and aeromotive regulator. now the motor, injectors, rail, fpr, and ECU is all stock. i dont have a fuel pressure gauge or a/f gauge, and couldnt find my stock pump. do you think the walbro is gonna push too much fuel or fuel pressure, especially at low RPM, on the completely stock ITR motor?

 

No, it will be fine.

 

i dont think the fuel pump will make your fpr let more fuel in than its supposed to

 

I usually see walbro push a couple more psi then stock buts its nothing excessive.