I have seen alot of discusions on this before but I am wondering what is the best lift pump to get for my truck? It has a tow tune and has a few bolt on parts. Stock fuel and air though. I have seen 1/4 tank issues with the 150gph and 165gph lift pumps. If I ever build my truck up I dont plan on making over 600hp. Will a 100gph be good enough or should I just do a 150?
Lift pump
- Thread starter MaxComp88B
- Start date
The 1/4 tank issues are resolved by a sump or draw straw. They are caused by the in tank pickup tube.
As for best, take your pick. AirDog is adjustable and smaller than FASS. FASS uses a bigger motor and thicker wiring but is a little louder and slightly larger. Both are great. Fleece is a nice pump but IMO lacks the filtration that is gained by FASS/AirDog. Fuelab and Aeromotive make a great pump but IMO it is overkill for your goals both flow rate wise and cost wise.
A 100gph will support 600whp no problem, there is no major downside of a 150-165gph on a truck in that range either. My most common pump is the FASS 165gph followed by the AirDog 2 4g 165gph, we sell the crap out of them both.
As for best, take your pick. AirDog is adjustable and smaller than FASS. FASS uses a bigger motor and thicker wiring but is a little louder and slightly larger. Both are great. Fleece is a nice pump but IMO lacks the filtration that is gained by FASS/AirDog. Fuelab and Aeromotive make a great pump but IMO it is overkill for your goals both flow rate wise and cost wise.
A 100gph will support 600whp no problem, there is no major downside of a 150-165gph on a truck in that range either. My most common pump is the FASS 165gph followed by the AirDog 2 4g 165gph, we sell the crap out of them both.
Brad, Have they changed the design of the Fass or the Airdog to allow flow through in the event of the pump failing??? Or is there a way to by pass incase it fails on a road trip?
I know the Fleece in-tank pump will at least allow flow through in the event of a failure.
Not sure about any others Except Kennedy. It's the only other one I am aware of with the Flow Through.
I know the Fleece in-tank pump will at least allow flow through in the event of a failure.
Not sure about any others Except Kennedy. It's the only other one I am aware of with the Flow Through.
That's a great question that I honestly don't know. I know I have done some diagnostic testing of unplugging a FASS/AD while running to see if rail pressure comes back down at idle but that was for ~30 seconds. I have not tried to run a truck with a failed lift pump. It wouldn't be very difficult to cut the hoses and put a splice in to bypass the pump should the need arise.
I don’t know how old the air dog is on my truck but I do know it’s not the 4g model. I lost the relay for it and the truck ran but not real good. It would get you off the side of the road or even a service station I believe, but nothing requiring any power like towing or horse playing. That being said, a bypass wouldn’t be that hard to put in. Think back to the old super diesel lift pump. It had a 1 way check valve in a hose loop in case it failed.
every 1/4 tank issue i ran into was the opposite. the additional draw straw older systems had didnt have a sump around them and would starve for fuel. If the truck used the newer style pumps where they hook into the factory pick up and fuel system, they had no issues at 1/4 tank as the factory sump took care of it.
Interesting.
I know my LLY and LB7 both had issues when using the OEM pickups that were solved when I went to a sump. Oh well. I can see an aftermarket draw straw having an issue with slosh if it's feeding outside of the OEM bucket. When I've done them we've drilled into the OEM bucket to pull fuel from there like OEM but with an increased diameter suction hose.
it's my understanding that the 1/4 take issue is from a cracked pickup tube that will allow air when the fuel level drops below the crack or the venturi on the bottom of the bowl has popped out allowing the bowl to drain back into the tank
Can you remember when your truck ever used 100 gallons of fuel in 1 hour? For me and my 2008 LMM, that's about 3 fillups after the original tank was drained.
you have to remember that more fuel gets returned from the injectors and cp3 back to the tank then injected into the cylinders. but you have a point
I have an old fass HD on mine for 10 years and it's one loud pump but I've unplugged it drove the truck around with no issues. I actually had the filters gel up last winter and I just unplugged and and drove around for a week like that.
I inherited a customer with a fass on his '15 lml. Pump had been on the truck for years, 200k probably. He had been driving with the pump off due to bad wiring for a long time, with no issues.
I will say, if you drive off road or in salty winter conditions a lot, or never wash your truck, the pumps corrode up pretty bad. In which case the fleece in-tank unit is a wise choice.
Sent from my SM-G960U1 using Tapatalk
I will say, if you drive off road or in salty winter conditions a lot, or never wash your truck, the pumps corrode up pretty bad. In which case the fleece in-tank unit is a wise choice.
Sent from my SM-G960U1 using Tapatalk
I bought my airdog 150 in 2013 and when the pump failed a few years later I wasn't stranded. Flowed through no problem. Only way I noticed it was because the gauge was showing 0psi and then realized I couldn't hear the pump running.
Fass was around in 2001? I thought they showed up around 2004-5?
Hey Jeff, you havent changed your sig in a while. Are you up over a million miles yet?
Hey Jeff, you havent changed your sig in a while. Are you up over a million miles yet?