I just got my B&M FPR and gauge. I probably going to install it tomorrow. Isn't the stock psi 46, if so I read I can move it up to 51 psi without screwing up the injectors. Should the psi be moved up to 51 with my intake, header, and catback or should it be alittle lower? Thanks.

 

why do u want to raise the fuel pressure? i'de stay with around 46 psi like from the factory.

 

But the factory psi was made for the stock intake and exhuast system. With more air flow the psi could be raised alittle to compensate.

 

the o2 sensor is what calculates the fuel flow rate. if you raise the fuel pressure the o2 will over correct to much or not enough

 

in my opinion i'de stay with the factory fuel pressure. the only difference is if you boost it then you could to the wrong way in my opinion and do a FMU but theres really no reason to add fuel pressure to it for no reason

 

Your computer only controlls the duration of fuel flow and not the pressure. Yes, the computer will compensate fuel for an intake, header, etc, but not at wide open throttle. A FPR does not make you have a richer mixture but makes your injectors behave like they have a slightly higher flow rate. This will allow fuel to be delivered faster than stock. Either way, I installed it. It's hard to tell, but it feels like it runs a little smoother. It's only supposed to give you 1 or 2 hp anyways though.

 

Don't mess with it. I'm boosted and running stock fuel pressure. The risk to reward ratio is not in your favor

 

Forty you have a stock FPR? What about fuel rail, injectors and pump? (sorry for the thread jack, but ive never heard of somebody keeping stock fuel pressure with boost...)

 

Stock rail, stock FPR, stock pump, new filter (oem) and DSM 450cc injectors with a resistor box.

 

damn, just bigger injecotrs and a tune? Thought fuel management took more than that.

Whats a resistor box?