fass installation

[Don Tanklage]

i bought a kit from for my 92 from vulcan perf



not the big double filter thing, just a pump and a ext filter



it is a really nice kit, very complete



however, i noticed one thing that they over looked and i wonder how many guys just installed the thing as per the instructions...



the problem lies in the fitting assembly that attaches the 3/8 line to the ve



they drilled and tapped (1/4 npt) the top of the 90 that goes on the adp fitting that screws into the ve. its so you can run a gauge



they incl a 1/4 to -4 fitting in the kit and a cap incase you are not going to run a gauge



that is all fine and dandy



however, when you screw that fitting into the 90 and tighten it the fitting goes into the fuel port and will cut off about 50% of the avail volume



its no big deal if you notice it, and drill the 90 back out after the fitting is tight (like they shoulda done before they shipped it)



but if you just screw it all together and inst it (like a lot of shops probably do) there is a good chance your motor is not getting the volume it needs at high rpm



just thought i would share that - would hate to spend that kind of money on a fuel system and not be getting everything it was designed to give



don

 

[bgilbert]

What kind of pressure does that particular Fass pump run at? I have always read around 20-25psi. That is a little high to be running all the time, even at idle. Course there are a few 1st genners that run it with no issues.

 

[Don Tanklage]

they put a 16 psi spring in the int press reg in my 150 pump



i am gonna send it back and have them put a 200 psi spring in there (so the plunger will never move)



(cant do that yourself w/o voiding the warrantee)



then inst a bypass reg with a return and reg it down to 10 at idle



i am trying to find a rising rate reg that is 1:2



that way at 40 psi boost the ve will see 30 psi



(with no air)



i think the int reg creates air