extremly high fuel pressure

[90s13coupe]

I have been trying to figure out what is up with my sr20 swap, the fuel pressure is around 80 psi at idel and i put a nismo adjustable fuel presure regulator on and when i adjusted it nothing changed, it just stays at 80psi. The car runs fine until u get into full boost and up around 4000-4500 rpms. Can anyone help me?

[eklips3]

maybe too much voltage is going through to the fuel pump ?

[codyace]

Does your gauge work? or is the FPR known working?

Remember

Pump
Feed
Filter
Gauge
Rail In
Rail Out
FPR
Return


you should immediatly see a change when using an FPR and adjusting it.

[90s13coupe]

i need more help than that because i read that a walbro 255 fuel pump can only put out 75psi max at 13.5 volts and mine is putting out 80-90psi at 13.5 volts

[VQMaxFan]

is there even a change in pressure when you unhook and hook up the vac. source?

[codyace]

i need more help than that because i read that a walbro 255 fuel pump can only put out 75psi max at 13.5 volts and mine is putting out 80-90psi at 13.5 volts

Um, where do you get these 'max' fuel presusres per voltage? Our cars don't have voltage regulated pumps, but vacuum.

Do you have an FPR on it?