Is my fuel pressure above normal?

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douglas vincent
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Is my fuel pressure above normal?

Post 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.
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Post 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.
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douglas vincent
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Post by douglas vincent »

The FPR doesnt have any settings.

Image


MSD Boost/Fuel Pressure Regulator
PN 2222

It doesnt have a setting unless the bottom set screw makes it adjustable. Maybe I can check.
Reddevil, Awaiting new heart, will it ever happen?
1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
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Post by vrg3 »

Yeah, I'm pretty sure that bottom screw determines spring tension.

I'm curious -- why bother with this gizmo?
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Post 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.
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