Fuel Pressure Regulator

[reckedracing]

The Fuel Pressure Regulator controls the amount of fuel on the inlet side of the fuel rail.

for more info
http://www.hstuners.com/forums/showthread....&threadid=17064.

i don't think the FPR has anything to do with inlet pressure...
it only restricts outgoing fuel
am i right?

 

[smarty009]

well...it is the last thing the fuel gets to on the way out of the engine compartment...so im thinking you are right

 

[hosmer]

but..it controls the amount of pressure behind it in the fuel rail, which I guess could be called the "inlet" to the combustion chamber...




?

 

[reckedracing]

ah, automotives have as much theory behind em as anything else...

 

[MikeBergy]

It's true. Fuel rail pressure is regulated by the FPR. It, however, has nothing to do with the inlet to the combustion chamber, as fuel is injected into the intake charge at the entrance to the intake ports.

The fuel pressure on the exit side of the FPR is whatever the total head generated by the fuel pump minus whatever the FPR is set at. This varies depending on the pulsewidth of the injectors at any instance in time dependent on the settings of the fuel map...