In a nut shell this is my truck:2002 Dodge Cummins 2500 4x4 Auto Trans. I recently installed 4" exhaust, gauges, AFE air intake, Edge comp 5 stage and Injectors. I believe that my next step would be something like the FASS system? My local Diesel boy's are telling me I only need the pusher pump and not the set up with the filters because all I use my truck for is pulling my 5'er.
Any suggestions? Does the FASS with the filter set up really add HP?

 

It isn't about adding HP, it is about supplying a good fuel supply to that injection pump so it has a chance to live. The VP44 Injection pump is the weak link in your truck, add the lift pump that is a proven failure in design and it spells disaster.

The lift pump supples fuel to the IP, it needs a good supply as the fuel runs through it and back to the tank in an effort to keep the IP cool. When the lift pump fails it starves the IP of fuel, lubrication and cooling which then in turn causes the IP to break as well.

Fass is not the only method available to help this situation, but it is a viable one. Do a search on lift pumps and you will see tons of research that has been done by members on this already.

 

You could go either way...and honestly i am surprised that you haven’t killed you VP YET! WOW what a list of stuff ya got on a stock pump! ANYWAY, both are great kits. The FASS goes about removing entrained air out of the diesel (Which aerates very easily. You can see this at fill up) to supply "clean" diesel to you Injection pump/injectors. SO...in a nut shell, your pump does not have to compress the air in the diesel first to pop off the injector. This advances your timing somewhat. Power and mileage is gained. How much, varies. Its possible that 200 or so miles is needed to purge your system of air before the FASS will have its full effect. Dynos have shown this. (On a personal note: when i installed mine 2 years ago, my truck idled smoother and was noticeably quieter...so much so that my wife noticed!!!!!! Throttle response was quicker as well. ) The best thing about the FASS and HPFP is the consistent fuel pressure - as stated above. I was getting 15 psi until i updated my old unit. Now im getting 22 PSI and pull it down to 20 @ WOT. Hope this helps........




O YEAH!!! WELCOME TO DTR!!!!

 

I realize that my stock pump is insufficient and I want to do something about it. I guess my real question was.... Go with the FASS pusher pump or with the FASS with the filters.

 

You don't mention gauges? Hope you have some!

Will the FASS produce more HP than just the HPFP pump? I don't know anyone that has tried both on the same truck and tried them on a dyno.... so can't say for sure. On paper it should release all your truck has and offer better fuel consistancy than just the pump.

I like my FASS (the one with the filter/separator) because it allows me to use a 3 micron fuel filter! Stock filtration is 10 micron. With todays fuel... smaller is better

I too, noticed a much smoother idle with my FASS!

RJ

 

otter,

We always reccomend the FASS with the filters to most folsk as it not only filters it stops the fuel areation, the cost difference isn't all that much when you look at the big picture too! The plain pumps are great, but you miss out on the reduction of air etc. If it helps the boys here at DPPI all have the filter kit on their list or already on the truck!!

Mark @ DPPI

 

rjohnson,

Yes and no, the full FASS will kill the air in the fuel, there is HP there to be had by doing that. The pump alone (no filter) does a lot to eliminate fuel starvation so of course it helps too.

Mark @ DPPI

 

RJOHNSON:

Yes, I do have the gauges in and working.


Just figuring out what to do next. You all have been a big help and I believe I will go with the FASS Filter system.

 

Go with the FASS with filters. I believe if you use only the pump you still use the stock filter and will have the pressure loss of the stock banjo fittings at the filter and injection pump. I have a friend that has a cheaper pusher pump system and no fuel pressure gauge. While towing the fuse on the pusher pump blew and the stock lift pump couldn't pull fuel through it so the engine was starved of fuel and killed his injector pump at the same time. He called me immediately and was actualling laughing about the fact I told him a pusher pump system was crap. Do it right the first time. Eric

 

Actually either the FASS with filters or the FASS High Performance Pump only will get you what you need. You will not lose by running through your existing fuel filter, and the pump only is a cheaper on the wallet way to go. But either way the FASS system, from what our friends are telling us that work on trucks for a living, is the way to go.

They offer a 95gph and a 150gph system. We have been told the 95 is plenty even for a moderately modified truck.

 

I agree! If you play with your trucks fuel consumption #'s and the GPH #'s, I believe the 95 gph pump will handle any exsisting hp level.

The only "not sure" variable in my calculations was fuel consumption at WOT. But even exaggerating that figure to 2 mpg... and using 100 mph.... the flow required only comes to 50 gph; well below the 95 gph rating of the smaller FASS pump!

But if anyone is interested in the extra insurance (overkill) factor of the 150 gph FASS... go for it

RJ

 

.....or the new 200GPH as of April 1st.......if you have to have it.......

 

Now dan what in the world would you need a 200gph pump for? All this talk of the fass makes me think that I need to get one now. Oh well. I'll wait until my lil ol' holley dies.

 

i would think that a very,very,very select crowd would ever need the 200 GPH.....but its there if it is needed.....