FPRs help control fuel pressure. When I put in a Walboro 255lph pump the fuel pressure jumped 3 psi, so I used the fpr to bring the fuel pressuer back down to 40 psi. Some people think that they can just crank up the fuel pressure and that will keep them from running lean when spraying a big shot. It's better to just get a bigger fuel pump instead, because fuel pressure doesn't equal fuel quantity. However, you'll still need that fpr to bring the pressure back down if you do get a bigger fuel pumpMugenPoweredLude said:so a FPR would do what with Nitrous???
so theyre beneficial...in a way????
so i should go ahead and install the one i got from AEM for christmas???