Engine/Transmission (1998.5 - 2002) Will comp Drag box kill my 2nd VP-44???

[WBraico]

I put the edge comp drag box in about 4 months ago at 85. 000 miles, stock lift pump was putting out about 12psi idling and 2to4 psi@ WOT. After smoking out a power stroke my engine died. That was the end of that vp-44,so I got another one from pierce and there delphi lift pump they say puts out the same pressure but more volume (it looks identical to the stock carter one) $1250. 00 and 3days of laying over the radiator it's in . It works great my fuel pressure at idle is 14to15psi and 6to7@wot. 5x5 on the box.

How long will my VP-44 last with this kind of pressure feeding it?



PS. Can I run a pusher pump in series on a seperate switch when in level 5?

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98. 5 Ram 3500 4x4 sport autometer,sport comp pyro,trans,boost,electric fuel press. w/snubber,warning light/chime. edge comp drag box,2nd VP-44 inj. pump,dual fltr. amsoil. allum trans pan, Bilstien shocks,westin bars,push bar custom 5" exhaust, silencer ring fell out

 

[Bob Wagner]

How often do you run 5x5 or 4x4 ?



Maybe a CaTCHER upgrade would make you just as happy without a pump tap. It may realy lengthen your lift pump life span



There is a member up in El Toro that may give you a test drive if you are interested.



just an another option

 

[rkressg]

Maybe I mis-read this, but you paid $1250 for a fuel transfer pump that only puts out 6-7 psi at WOT?



For your listed mods, you could have bought a FASS for half that, and you would never even be able to move the FP gauge from 16psi no matter how hard you pushed on the loud pedal.



Longevity of the pump is directly proportinal to the work it produces. The harder you work it (driving on 5x5) the shorter the life span. If you leave the box off, it should last longer. At 6 psi, you are below the minimum recommended head working pressure for the pump. I am not going to tell you it will not last any longer than any other setup.



Yes you can get a pusher pump, but you will have to wire it to not run while starting the truck, or you can produce a 'hard start' condition from too much pressure during startup. Also, the VP-44 has a designed working pressure range, without looking it up, I believe it is around 8-16 psi. If you create excessive head pressure at the pump with a pusher pump, you can potentially do damage to berings inside the pump (in my own opinion). It is similar to having an oil pump that produces 200 psi of oil pressure. The pressure is great, but you wash the main berings out of the engine.



I am sure you can put a pusher pump in, many people here have. I personally prefer other options.

Just my $0. 02

-Rich

 

[Graphic man]

i would just go with a FASS or a RASP or something good, and forget about

it, i have heard that too much pressure is just as bad as not enough

10 -15 psi would be the best! (IMO)

anymore then 5 at start-up and you will run into starting problems.

 

[RLinkins]

Hmm thats funny you say that about any more than 5psi it will have a hard start. I heard the same thing and it finally came down to buy new vp44 or upgrade fuel system and it was cheaper to up grade. I went w/ the fass and it now starts better than it ever did. I think who ever started that is full of crap. I know of no one else that has any hard starting problems with the fass either. IMO the only way to keep your fuel system from taking a crap is to bypass the factory lift pump. It sucks it always will suck there is no way around it to make it not suck.

 

[rkressg]

RLinkins,

When you start you engine with a FASS, it does not close the relay during startup, causing this FASS to turn off while cranking.

The pump while off produces 0psi. The VP44 during starting is only fueled with residual pressure in the lines with a FASS, probably some value less than normal pressure.

If you want to prove me wrong, hotwire your FASS and see how long it takes to cause a 'hard start' problem to occur. I will not guarantee this 'hard start' will occur with your specific truck, but it is a known issue with some VP-44s.



I do agree with you when it comes to bypassing the factory LP. That fuel setup is designed to pull fuel less than three feet from saddle tanks, not through 15' of fuel line. Remember, pumps work better when the push, not pull.



I love my FASS. I have never had any problems, except for the relay dying it has been great.



-Rich

 

[WBraico]

You asked if I paid 1250. 00 for lift pump, IT also included the VP-44.

I dont know if I have more room for a FASS in my engine compartment,I guess I can mount it on the frame rails. HOW MUCH SHOULD A FASS COST?

 

[Pmaloney]

FASS systems mount on your frame rail right by your fuel tank so no need to worry about your engine compartment, far superior setup to factory so are the RASP and AirDog, cost is in the 550-650 range (cant give quote) I got mine through Rip at Source Automotive, great customer service. Any of the 3 systems mentioned will do you good for a long time.