Piston style lift pump!

[dpuckett]

I have a Delphi ebay special lift pump- 11-12psi after a fresh filter at idle and cruise. Pulls down to about 9psi on a hard WOT run (near stock truck, though- 25psi boost with my 60/16). Doesnt cost as much as the Cummins pump, flows better than a stock diaphragm pump. It's another option if you dont want to go hog wild with the power. I wouldnt run an electric pump- if I wanted that, I'd get a 2ndGen 24V.

[ahale2772]

that seems like a good deal it will hold 9psi under WOT, worst part about a 24v is that they cast the block with no provisions for a cam driven bugger

[dpuckett]

Put a nonIC cam in the 24V- better profile, and you have the lift pump lobe. (the 24V engine still has only 12 pushrods; it has a bridge under the rocker arm)

[ahale2772]

dpucket, i think they cast off the area for the mechanical lift pump on the block too, tho i do agree a non i/c cam is a better profile

[ellis93]

I pulled the fuel pump and mount off of a 99 before and the hole was there. May not be on all but it was on that one.

[1990]

I have a Delphi ebay special lift pump- 11-12psi after a fresh filter at idle and cruise. Pulls down to about 9psi on a hard WOT run (near stock truck, though- 25psi boost with my 60/16). Doesnt cost as much as the Cummins pump, flows better than a stock diaphragm pump. It's another option if you dont want to go hog wild with the power. I wouldnt run an electric pump- if I wanted that, I'd get a 2ndGen 24V.

http://cgi.ebay.ca/DODGE-CUMMINS-5-9-DI ... 1e5e0a3b65

This it?

[91_CUMMINS]

1/2 inch suction line to the LPPP, 18 at idle, 14 at WOT. Stock lines and filter after the LP. That's at 347 hp on a mobile dyno. Before the big line it dropped to about 9-10 psi.

why color of dot do u have on ur pump? Did u have to crazy glue your front seal on the pump to keep it from pushing it out? How many rpms u making n injector sizes? Thanks

[PToombs]

Never paid any attention, and now it's all black. I can tell you that I got it from the Case dealer I work at and that it's a Cummins pump in a Case box. I didn't glue the seal, the VE has never been off. She'll run out to 3500 rpm's and I have a set of 370's, 5x.012's.

[91_CUMMINS]

How much did the case pump cost n do u know any part numbers?

[Richie O]

How much did the case pump cost n do u know any part numbers?

The CASE pump is now over 350 bucks. The part number got updated and the price took a huge jump. It is now cheaper to go with a cummins dealer. Their pump was 185 last I knew.

[ahale2772]

seems like they all jumped before I bought mine it was romored u could get one for 125, I paid 200 and ive seen them for 300 range these days

[91_CUMMINS]

1/2 inch suction line to the LPPP, 18 at idle, 14 at WOT. Stock lines and filter after the LP. That's at 347 hp on a mobile dyno. Before the big line it dropped to about 9-10 psi.

you've never done anything to your IP seal? I want the LPPP but don't feel like taking the IP off if I don't have to?

[PToombs]

With the stock lines I never had over 16psi, then only on startup when it was cold. I didn't have a strainer in line before the LPPP and scarfed the piston with crud on the way to SOP last year. Pressure dropped to 13psi tops after that. I decided I needed more fuel so i upgraded the line.
I'm not saying the seal won't blow out, it depends on lots of factors, how tight in the bore it is, how old it is, etc. I'll worry about that bridge when it falls in......or out, as the case may be!
If you're worried, pull the IP and fix the seal, or not, the choice is up to you and how worried you are about it.

[91_CUMMINS]

Anyone know if these cummins part numbers are lppp part numbers? Cummins #s 3936316, 3933252, 3932224, 3930134, 3925709. There's a pump on eBay that's case but these are the cummins replacment numbers, just wondering if it's goona work on my truck? It's only like 100$!