aftermarket pusher pump q's

[CRegal]

Ok, Just a few q's about what is all needed to make a replacement.



You need a pusher pump & regulator at the tank. Then you run say -6an lines to the fuel filter. This I all understand, but from there is where i have q's. Where do you run your return line from? vp44? How do the stock lines connect to the tank & where? I notice when I look there are 2 copper lines, I assume one is the return. I would like to keep them as the backup w/ the stock lift pump.



How many fett does it take to run to the filter? I noticed that mallory recommends only 4' from the tank to the filter & there is way more then that. Do I need to put another filter at the tank before the regulator? Some regulators suggest this, but of course i would like to keep it as simple as possible.



Any insight will be muchly appreciated.



Cole

 

[Peter Campbell]

I just put it in. Ted Jannetty kit, with my mods. I previously put in the large diameter fuel line ( Ted J kit again) which was 1/2" aeroquip push lock- overkill for the suction line. Then that did not help the lift pump problems. His kit consisted of a carter 4600- 100GPH 7PSI for a pusher pump. That I ran into a fuel filter, then I went to the replacement lift pump. Then of course the stock filter, then the VP-44. The VP-44 I believe has a spill valve that will try to maintain somewhere above 11# and dump the rest to the return line. A stock return regulator ( I think) what complicates it is the fact that the VP-44 is actually 2 pumps. Another small pump the maintain Net positive suction head to the main pressure pump. That is where you get the 23,000 PSI pulses. If the spill valve is plumbed in the wrong place then it will not regulate the replacement lift pump. (carter 4601 100GPH?? and 15 PSI) I used 1/2 " pushlock from fuel tank to Pusher pump. 1/2" pushlock from puisher to filter. 1/2" pushlock from filter to replacement lift pump. I used -6 or 3/8" steel braid line from lift pump to stock filter. You will need banjo bolt to -6 fitting. on the filter and a 3/8" NPT by -6 on the pump. As an extra little bit of show I also changed out the line to the VP-44 with steel braid -6 lines. Note: Flush the bejesus out of the line to the VP-44. Any dirt can kill the injector pump here. The pusher pump is powered from a relay that gets its signal right off the lift pump. Later I will be putting in the pressure instruments to monitor the setup. Therre are some threads of those with even a bbetter setup with a water seperator ann low loss suction filter on the pusher pump suction. Hope I helped.

 

[bombero]

Every time that I read a post about the lift pump problem I get really ******. Why cant someone build a pump to replace the existing junk without having to go thru all this sh**. Seems like Cummings would have this fixed by now!!!

 

[proflow]

Bombero

same, same, I know this has been beatin' to death but for the guys who can buy & install, lets get this together in one simple dirrection. I believe we have a war on who thinks who has it all figured out & they wont post simple "how to" because of bashing. I dont blame them. I sure would like to know the perfect combo though. ---Proflow

 

[tntway]

Cummings?

bombero... . do you have a different motor that we dont know about? the lift pump problem is caused by Chrysler, not CUMMINS...



chrysler was told to mount the pump by the tank and they insisted that it be mounted on the motor... ... .

 

[Steve St.Laurent]

Proflow, if you go back through this forum you'll find that there's a ton of different "how-tos" from different people on the setups they're running. The whole point of this post - https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=37897 - was to see if anyone and how many have had failure running a helper pusher pump back at the tank feeding the stock one at the engine. So far 6 have responded that they have had no problems and 1 guy responded that he had a failure at 1500 miles. I'm hoping for more responses - I know there's a lot more out there running this setup.

 

[Peter Campbell]

I just now put this system in. Before I go and get regulators and such, I think I will just put in the pressure instruments to see what I have. 56,000 miles on stock pump-hope to have more on this setup. I did not give it a chance to fail yet, but it does not GAK fuel all over the ground so I have that going for me.

 

[MCummings]

Originally posted by bombero

without having to go thru all this sh**. Seems like Cummings would have this fixed by now!!!

WHAD I DO????



I'm working on it. So, I've killed two lift pumps, and a VP44. I have a dual pump, and dual filter (Filter before the pump at the tank) Carters die because of lack of lubrication, and debris. Diesel fuel is very "dirty". Ever change a fuel Filter ?? Ever looked at the bottom of a fuel filter canister??? Yes,, Your carter pump had to pump all that gunk at 60GPH at 15PSI.



Put your filter pre-pump. My setup from ADT has a Baldwin spin-on filter , then 3" later a 7PSI carter pump connected to -6AN liine all the way to the original location Carter (New from ADT) then -6AN line goes from the pump to the fiter housing, then again from the filter housing to the VP44.



I need a 0-30PSI fuel gauge soon and I can give yall some good numbers. I'll tell you what Prime, Idle, Cruise and WOT #'s are.



Merrick Cummings Jr