george7941

The 4601hp pump that I have mounted by the tank does not seem to last very long and my second one is slowly losing pressure. I am seriously considering a Walbro 392. SuperDuty initiated a lot of discussion on it but unfortunately he does not post here any more. The last info I had on it was that the 1/4" regulator could not handle the flow. The topic seems to have died a slow death after that. Has someone actually implemented a Walbro on a 2nd gen. truck and been happy with the results?

Geico266

The last I heard they were running the Walbro with no regulator, and a bypass line. They were relying on the friction of the 1/4" return line as the "regulator". They were only getting the stock LP pressures 17 PSI idle, 10 PSI WOT, but the volume was suppose to be greater.

http://www.cumminsforum.com/forum/sh...ht=walbro+pump

FASS is coming out with a new line of pumps in a week. You might want to check them out first.

linetrash75

Thanks Geico thats what I was after, looks like they got that pump working good. Good reading over there if anybody is interested in installing a walbro pump.

Jed

george7941

I am going to try the Walbro with a Holley bypass. I probably won't get to it for a few weeks but when I do, I will post the results.

043500QC

We`re still trying to get the Walbro setup perfected. It is working good, just trying the pressure regulation consistant. That seems to be the only problem we`re having right now.

Hey Geico, you never answered my question about why you think the Walbro is only a good "replacement" pump ? Care to elaborate ?

piperca

According to Superduty, on a second gen, if you run the pump without a regulator and add a 1/4-5/16" bypass, from the inlet at the VP to the return line, you'll get 17 PSI @ idle and between 10-13 PSI @ WOT (depending on mods). That is giving a flow of 70 GPH @ the VP ... SWEET!