2nd Gen Non-Engine/Transmission Lift pump in tank?

[CamB]

I have been reading several threads about upgrading the factory lift pump, after looking under my truck it looks like I have the dealer upgrade with the pump in the tank. What is the best way to relocate the pump or is it possible to install fass of air dog?. Also how well does the dealer installed pump in the tank perform?

 

[Geno's Garage]

You are able to use the FASS or any other aftermarket pump in conjunction with a drawstraw. You do not want to pull fuel from the factory pick up once the intank pump is installed. After the drawstraw is installed in the tank, the rest of the FASS install will be the same. The in tank pump will perform ok for a stock or even slightly modified truck, but regardless of what transfer pump you are running, monitoring your fuel pressure should allways be done. That is the only way to confirm that any tranfer pump is sending enough fuel to the VP44 injection pump. You do not want to see less than 5psi going to that pump under load. I hope this helps, If you have any other questions feel free to dial us up.

 

[jelag]

We have all stock trucks... in respect to HP... . we had several failures of the lift pump and those trucks have been converted to the in tank pump... Since the move to the in tank pump we've not had a failure... .

We've also installed a 10 micron course filter and a 2 micron fine filter on the frame rail... We've spot checked the fuel pressure over the course of 40K plus miles on this filter on our 5500 6. 7L engine... we've not seen a drop in fuel pressure nor have we had to change the filters... .

Since the filter area of these filters is at least 3 to 4 times the surface area of the stock filter we assume we'll see 75K miles between changes... . since these filters are collecting the dirt on the first pass, we assume that we'll see the life of the truck as the life of the in tank pump and supply system... . as well as improved life on the injectors and fuel system on the whole... .

Early on before we had the in tank pumps we ran the Holly RED pump as an auxiliary pump and had a lift pump failure... . to our surprise the 17 psi of the RED pump wouldn't push fuel pass the failed engine mounted lift pump and it left us stranded on the side of the road...

If we decided to up the HP on the engines we might consider a new lift pump as an auxiliary pump but remember the spec's of the existing tank mounted pump exceed the spec's for the frame mounted pump... . We've have to add I'm guessing 100 HP to need the help.....

Hope this helps... .

 

[Batphreak]

In reference to the in-tank pump performance. I know quite a few people say it doesn't hold pressure to the VP in high demand situations. However I have had that in-tank pump in my truck for the past 3 years, it hasn't missed a beat. My truck is all stock (except for the Blue Chip special X injection pump) and I don't really tow regularly or drive with a heavy foot. If I were to head down the path of BOMBing the truck FASS or similar system would be one of my first upgrades, in stock form I don't think it's a huge worry, though.

 

[Colando]

In Tank Pump

I had two stock fuel pumps replaced by dealer under warranty. When the second one failed they installed an intank pump,still under warranty, The intank pump never put out more than 7 psi at idle and dropped to 3-4 under load. Dealer told me this was normal , I finally gave up on Dodge fixing the problem, and purchased an Air Dog. I've been running it for about a year now and love it. Never goes below 16 psi. I put my original pickup back in the tank with the Air Dog but the Draw Straw would probably have been an easier way to do it. Just my 2 cents worth.

 

[jeepit]

I had two stock fuel pumps replaced by dealer under warranty. When the second one failed they installed an intank pump,still under warranty, The intank pump never put out more than 7 psi at idle and dropped to 3-4 under load. Dealer told me this was normal , I finally gave up on Dodge fixing the problem, and purchased an Air Dog. I've been running it for about a year now and love it. Never goes below 16 psi. I put my original pickup back in the tank with the Air Dog but the Draw Straw would probably have been an easier way to do it. Just my 2 cents worth.

I did the same but 3 years ago. Everthing is workin just fine... . also took out stock filter housing and ran 1/2" line all the way.