Obviously the amount an engine needs is dependant on horsepower.
So, how much fuel does a given horsepower take?
How much excess fuel does the VP-44 need to stay cool and survive?
What pressure is optimum for these engines?
I have the ear of one of the manufacturers and If I can give him hard numbers (None of this "All the fuel you can give it" answers) He is going to see what he can come up with without breaking our bank accounts.
I'm guessing we could go with the five stages available with the popular black box as a starting point.
So...how much fuel (Gallons per hour) to keep the pump cool, and then, how much fuel for the five popular HP levels?

Thanks gang,
Steve

 

... if a fuel pump could pump fuel??

 

on a serious note, i cannot even begin to guess how much gph it would take. if someone knows how much they take stock , that would be a start. But it takes enough fuel to mantain 20-25 psi (no higher, to much psi causes hard starts and is hard on vp seals) would be ideal. i dont think it will take that much more to run 500 hp then the stock 245/235. a noticable difference, but not a lot.

 

Beat me to it, I was scrolling to reply when I saw your post

 

Welcome to the shallow minds of Dodge owners.

 

Interesting note.
My replacement 4601HP has a note on it that a #404-500HP or comparable Regulator is required.
So, noting that the internal regulator failed, maybe installing the regulator to let more fuel thru the 4601 is a start......??
Do I want two returns on this thing (Well, a tee in the return really)?
May be time to do a little R&D.

 

I found this in some old Walbro threads posted by Superduty. I miss that guy.

The fuel flow needed for 250 HP is

250 x 0.4 lbs/HPHr / 7 lbs/gal = 14 GPH for consumption.

Add on 30% excess flow for cooling and lubing the pump and you get 18.6 GPH.

For 325 HP. 325 HP x 0.4 lbs/HPHr /7 lbs/gal x 1.3 = 24 GPH

For 400 HP 400 x 0.45lbs/HPHR /7 lbs/gal x 1.3 = 33 GPH

For 500 HP 400 x 0.48 / 7 x 1.3 = 35.6 GPH

For 600 HP 600 x 0.5 /7 x 1.3 = 55.7 GPH

Found here:

https://www.dieseltruckresource.com/...ghlight=walbro

FYI the Walbro is a perfect match for the demands of a VP44 and it's under $100. BTW 20psi is optimum per II.

 

He's easily found on another forum.

 

I was told by a cummins tech in Evansville that the stock pump was rated at 90 gph. The FASS has both a 95 and 150 GPH. I would think that 95 and 150 gph would capture the stock to "level 5" range.

 

I would like to know which one, please. HE is a smart guy and I have been reading his post on the 3 generation, lift pump, injection events, ect Thanks Jim

 

It starts with a "C" and ends with a umminsforum. com

 

This is good to know.
I hadn't seen just a pump from Walbro.
Everything I found was a filter seperator/ pumpo assy for substantial cash.
I'll see what I find.
$100 is a good price if they stand up.

Thanks guys.

 

Thanks PJ, I'll have to make my way over there.



You want the GSL392 there's one bidding now on ebay for $51. As far as holding up, it's cooled by fuel not air and it's a big pump. I beleive it's similar to what the fords run and they don't have lift pump problems like we do. I've only got 2K miles on mine so I can't say for sure yet, but all signs say it will last a long time.

http://search.ebay.com/search/search...392&category0=

 

Definately the Walbro setup! Obnly drawback is the need for a return line with a pressure regulating check valve. Glacier diesel is nice. Mine is a Vulcan Big Line that has been mutilated into a custom job. 10 Micron Pre Filter, Shut off Valves, GSl-392, 1/2" Supply, 3/8" Return Looping right at the VP. Not too hard. You can tackle it.