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Is my fuel pressure above normal?
Posted: Fri Mar 25, 2005 6:30 am
by douglas vincent
I have the Walbro pump, and since I finally replaced the old old old dirty tank sock, my pressure jumped up so it averages between 39 and 43 psi off boost, and on boost at 50 psi ( I have a 1-1 rrfpr).
Runs great finally though.
Posted: Fri Mar 25, 2005 6:43 am
by vrg3
You don't have an RRFPR. You have an aftermarket manifold-referenced FPR.
What pressure do you have your FPR set to?
Standard fuel pressure on our cars is about 26 psig at idle, about 36 psig at WOT on non-turbo cars, and about 45 psig at full boost on turbo cars. More precisely, it's 36.3 psi above manifold pressure.
Posted: Fri Mar 25, 2005 6:48 am
by douglas vincent
The FPR doesnt have any settings.
MSD Boost/Fuel Pressure Regulator
PN 2222
It doesnt have a setting unless the bottom set screw makes it adjustable. Maybe I can check.
Posted: Fri Mar 25, 2005 6:53 am
by vrg3
Yeah, I'm pretty sure that bottom screw determines spring tension.
I'm curious -- why bother with this gizmo?
Posted: Fri Mar 25, 2005 7:17 am
by THAWA
Heh, yeah I looked into that fpr. If you leave it connected as it is, the screw will adjust the fuel pressure to a fixed pressure. If you install the nipple like dealie it will use mainfold pressure to adjust fuel pressure higher or lower than what it is set at.