How can i adjust my fuel pressure

[darky82]

Hi, how can i adjust my fuel pressure on my vs 5.0L with an aftermarket performance type.

[Vee-ard]

What? Do you even know what you're asking?

If you want higher fuel pressure get a higher pressure fuel pump like walbro or something.

If you're not running a supercharger or turbo you're wasting your time. Higher fuel pressure is not going to make your car go faster because the amount injected by the injectors is still gonna be the same.

[Z2TT]

Isn't the pressure going to be the same no matter what fuel pump you use since the FPR regulates it at the rail?

[IBLOWN]

Isn't the pressure going to be the same no matter what fuel pump you use since the FPR regulates it at the rail?

Lol yes.

To get more pressure you need an adjustable fuel pressure regulator.

[VR38]

the question is why would you want to?

[immortality]

changing the fuel pressure without out adjusting the tune will make the engine run rich also, the injectors are designed to work with 43.5 psi (3bar) so why change the fuel pressure from that?

the factory fuel pressure reg is vacuum referenced from the intake plenum at 1:1 ratio so if you were to boost the engine then the fuel pressure will also rise 1:1 as boost increases