FPR's

[GPChief]

Besides JUD, have any of you tried different FPR's (Fuel Pressure Regulators)  I am wondering if maybe a Z34, or even a 3.8SC one would do us any good?

Looking forward to the input...

Chief :usa:  :2gunfire:  :snipersmile:

[GPChief]

Bump.......

Crickets chirping.......

Owls Hooting............

Bueler, Bueler,.........

Will research some fuel pressures on related vehicles......3.4 DOHC, 3.8L N/A, 3.8 SC etc. 3100, 3400,....

[Invasion1]

all i have to offer is that i bought a new one last spring and its the same part # for all 3.1's including turbo version

im not sure but im willing to bet the 3.4 and 3.8 would be the same one....

don't know forsure but thats my guess

[GangstGP]

Have you noticed any drawbacks to the design of ours?
Other than the rubber "T" that always dries out and leaks.

[TurboGTU]

Most w-bodies up to 96 according to my shop manual says they all typicly have about 45psi of fuel. 3.8,3.1,2.8, 2.3, 2.5, 3.4. Our fuel pressure regulator also adds fuel pressure with boost because boost keeps the diapharm from opening beyond 45psi. A ajustible unit that a grand am site (forgot whom exacly) has can ajust beyond stock fuel pressure or lower.  A FMU can add more fuel pressure beyond stock fuel pressure regulator can with boost.

[RareGMFan]

Could someone explain to me in some detail just how a RRFPR works?  I get the general idea, but how would one be installed, does anything need to be altered on the computer, what is the exact science behind it, etc....

[GPChief]

A rising rate fuel pressure regulator (RRFPR) raises the fuel pressure in relation to boost.  It is hooked up in the return fuel line and restrics fuel return flow thus increasing the pressure.  

theoretically you could use one without computer mods but more than likley your motor would blow without taking timing away also. :shock:

[RareGMFan]

theoretically you could use one without computer mods but more than likley your motor would blow without taking timing away also. :shock:

Yeah, that's the part I was worried about without a way to control everything else associated with the timing.  And the trade off is we can get a bit more pressure out of them/adjustable vs the OEM ones available for our engines?  Most of the rest I knew, already.  Was just curious as to how it would be hooked up/installed.