I would not say that holly pumps are bad they are not designed for continuing use as a daily driver fass or air dog pumps are built for class 8 trucks for a harsh environment and diesel operation holley is for gas. I myself have been into diesel for years old truck driver, hot a high horsepower freak just the torque to pull.

 

i just installed the raptor 100 it comes with everything fittings, hose the instructions are easy to read it took me about 6 hr
dropping the tank removing the intank pump and replacing it with a diff sending unit. my intank pump was at 5-6 psi and know with the raptor i have 17 at idle and 13 wot
i think i'm going to have to drop the tank again my fuel gauge is still on full after running 80 miles maybe the sending unit is stuck
so far im happy with raptor good luck with yours

 

Lots of threads about lp failures and how they affect the vp. Lots of debate about which aftermarket pump to use as well. One common theme thought - those that install AirDogs or FASS pumps rarely write about fuel pressure problems - with the exception of 1/4 tank issues (for which there are a number of solutions). IMHO, install an AD (or FASS) and be done with it.

FWIW, I chose an AD100. Their customer service is second to none. I had an intank pump so a mod was definitely in order (plus, I wanted to address the 1/4 issue before it was actually an issue). I will (eventually) post "how I did it" for those with intank pumps but folks like Vulcan are already developing kits to handle the conversion. Hope this helps with your decision.

 

In fact, we have beta testing kits going out right now. And I think we may have a revision before those guys even got 'em.

Dave

 

Actually, the Holly pumps are fine for continuous use. I've been running a Red on the frame rail and a Blue at the stock pump location - inline config - 18 lbs. at idle, 13 at WOT. Five years, 60K miles so far.

I set this up after losing 2 stock lift pumps in the first year of ownership. At the time, there was no other good solution. With the Holleys, the key is the nitrile rubber seal on the vane shaft. If it leaks, diesel will travel up the shaft and kill the windings and magnets. If it doesn't, the pump will last a long, long time.

 

the biggest question I have is, do you have to modify the stock pump to add a pusher pump back at the tank (on the frame rail) or will it push fuel thru the stock pump. my stock pump seems to be fine so far, haven't checked fuel pressure yet, but will soon. My thinking is if this set-up works, if either pump fails, you wouldn't be left walking, & a pusher pump would make life easier on the stock lift pump. anyone have theirs set up this way?

 

IMO, depends on the pusher pump you use. If you're installing a FASS or an Airdog on the frame rail, why try to push fuel through the stock pump? Really, the best solution is to replace the stock pump completely with one of these.

On the other hand, if you're looking to use a frame-mounted inline pump to relieve some of the stress on the stock pump, you can use a low pressure pump like a Holly Red without a regulator. My solution after my stock pump went out was to replace it with another stock pump and mount a Red on the frame by the fuel tank. When that second stock pump went out, I replaced it with a Holly Blue and a regulator, and left the Red inline, where it still is today.

Realize, however, that if either the stock pump or the auxiliary pusher pump goes out, fuel will likely not get to the IP unless you're lucky and the rotor of seized pump is turned to clear both the internal inlet and outlet holes.

 

Who sells the 100gph raptor the cheapest? I like the looks of that kit. Everything is there in the kit and I can probably install it in an afternoon.

 

That is all I want. The pump without the filters that goes into the stock filter cannister. You guys should run a special on the raptors also. Who has the best price?

 

FASS is a brand name as well as the manufacturers name. We identify FASS pumps by "full systems" or without filters here. The real tough to follow stuff is the 95 and 150GPH FASS filtered system can be had in either the 95 or 150 series. Type A or B would have been clearer to a guy like me.

So a HPFP is still a FASS. A system with filters is still a FASS. So, the guys comparing FASS pumps to the Raptor are technically correct. As you don't hear guys calling out the full system as a 150/95 comparing to an Airdog 150. At the end of the day it's smart to have one encompassing name to cover your line. It's the reason for the popularity of their products IMO as it's easier to remember that one name.

We have had to get good at identifying the pump the customer wants due to the confusion associated with all the pumps in the aftermarket.

Dave

 

I spoke to a local diesel mechanic today and he mentioned a walbrow or something like that. He liked the reliability as he has had no problems with them. Does anyone have any experience with them or can tell me what they are about?

 

Ok my question is.....if I buy a FASS DDRP, can I mount it on the frame rail and leave the old original lift pump in the tank? I didn't know if it would pump fuel through it or not. Id probably rather put a drawstraw in the tank and let it suck fuel freely rather than try and suck fuel through the pump. Am I correct on this?

 

Did the dealer replace the stocker with an intank unit?

 

I'll know in a few days my truck is in the process of being shipped from Texas I actually just bought it a few weeks back. If it was on the motor there already should have a drawstraw in the tank right? If it had the pump in the tank that was where I was getting at.