fuel pressure question

[Fenvy]

providing that the fuel pump is good, fuel is good, will fuel pressure vary from harsh driving condition/temperature?

I am trying to see if I actualyl need a fuel pressure gauge or I can just borrow one, set adjustable fpr to desired pressure and forget it.

[RED_DET]

It will not vary. Fuel pressure is set at idle with vacuum disconnected.

[Fenvy]

when you say vacum disconnected, you mean the vacumm between FPR and the intake manifold right? do I just idsconnected it or do I need to block off of the hole on either/both side?

[RED_DET]

THere is vacuum line running to the stock fuel pressure regulator. Just unhook while car is idling, set fuel pressure to desired need. 3 bar = 43psi, 4 bar = 59psi

[outlaw_customs]

THere is vacuum line running to the stock fuel pressure regulator. Just unhook while car is idling, set fuel pressure to desired need. 3 bar = 43psi, 4 bar = 59psi

Do i need a After market FPR to set the presure? or is there another way i could incress the presure with the stock FPR thats on the fuel rail?

[RED_DET]

YOu have to have an adjustable FPR(NISMO) will work fine. THey are less than 100 dollars. Its a direct replacement for the oem regulator.