my fuel pressure gauge is working, no leaks. the readings are HIGH, but i've been told by jackson racing that they're "normal" - 50psi idle, 75psi with the vac line to the JR FMU unplugged, and possibly as high as 100psi boosting/WOT. i thought it was more like 85, which would be 50 + (boost psi * 5), but maybe it's actually 75 + (boost psi * 5). my boost gauge shows about 6-7psi consistently, and the A/F is a couple bars rich when under throttle.

since the fuel filter is just about totally inaccessible, and the sealing nut on the fuel rail has about 1" of space above it (belt in the way), i teed the gauge off the fuel line from the filter to the rail as follows : fuel filter -> 5/16 hose -> 5/16 barb tee -> 5/16 hose -> banjo bolt on fuel rail. the other arm of the 5/16 barb tee goes to a 1/4 hose -> 1/4 barb to 1/8" female npt adapter. the fp sender is screwed into that adapter. the 1/4" hose coming off the tee is about 12" long. i notice that most people attach the senders directly to the tee, but with the type of tee i used, that's not an option. so, my question for all the fuel system gurus : could this extra length of hose, and the presence of the barb tee inline with the main fuel feed, be affecting my pressures at all? there are also a couple S bends in the fuel line that weren't there before, to accomodate the rigidity of the portion with the T in it. i'll take a picture when i get a chance to show everyone the horror of intake manifold clearances on a jrsc'd h22a.


[Modified by schwett, 10:44 AM 8/31/2001]

 

It shouldn't because once the system pressurizes it should be even all over. I have the same setup, teed after the filter and it works fine.