what exactly does an aftermarket fuel pressure regulator do? I mean what kind of benefits would there be other than on forced induction?

 

bling bling yo.

 

thanks for all the help with such an in depth description on function :fawk:

 

no prob. i did turn up the fuel pressure to c wats up, and all my car did was backfire more. (im like the only hatch around that backfires n/a.) :chuckles: i only got cuz it was such a killer deal.

 

:huh: That looks almost identical to mine... we hve the same ignition, fuel rail, fpr, wires... odd. :thinking:

I don't see an aftermarket FPR doing all that much for you, except for causing tuning problems on a stock motor. If you were running larger injectors or something of that nature then you may want one, but no need unless you have a good reason to regulate the fuel to levels other than the stock FPR would.

 

The basic purpose of a FPR is to maintain a constant pressure across the fuel injector. As you open and close the throttle, the pressure in the intake manifold varies greatly from relatively high vacuum (low pressure) at idle to pretty low vacuum (high pressure, almost atmospheric) at wide open throttle. For the injectors to function correctly, there needs to be a constant pressure difference between either side (one side exposed to the manifold vacuum, and the other exposed to the pressuized fuel system). So when intake manifold vacuum increases, fuel pressure must drop accordingly or the injectors will be over-pressuized, or visa versa. The function of the fuel pressure regulator is to adjust the fuel pressure to correspond to the intake manifold pressure.

As with any other component of the fuel system, there is absolutely NO benefit in messing with it on a stock application. There generally is little reason to mess with it at all on NA applications. Forced induction is a different story, however. Force-fed engines actually experience POSITIVE intake manifold pressure (negative vacuum). This means fuel pressure has to rise significantly in order to maintain injector pressure. In this case, you need a FPR that can handle much greater fuel pressures than the stock unit can (in addition to a fuel pump that can PROVIDE that increased pressure in the first place).

Hope that helps.

 

THANKS:thumbup: