fass or airdog?
 

okay im gettin ready to buy a fuel system i and was going to order an airdog 2 and i heard purflow airdog has a different owner and has went down ill considerably and the fass titanium series aint lookin to bad but i just want some updated opinions for 2014 on who has the superior unit so lets hear it people.

Fass has always been superior. Air dog always had an extremely high failure rate but managed to cover it up for a while. They sold out when they could no longer keep up the cover ups.

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i like fass. I only installed one airdog and it was because the guy insisted thats what he wanted. After a month of work, a new injector pump, beating my head on the wall, and finally puting a fass on it, we found out that the clamp airdog sent wasn't strong enough and when the fuel level got below the clamp it would suck air. Airdog customer service was terrible. After installing everything per there directions the truck wouldn't start. I stayed on the phone with vinny at alligator for 2 hrs. and still didn't get it fixed. Next we decided that the pump must be bad. After taking it back off, air dog said they didn't have one on hand that they would have to build one the next day and ship it to me. 3 days later they finally got one built and shipped it, to arrive overnight after i had to pay i think 85 dollars shipping! The owner wanted the truck ready to drive to denver in mid july and i started all of this about the end of june. It shouldn't have been a big deal but it turned into one and cost me a lot of time and money. Alligator performance was very helpful through the whole thing and they wound up sending me a fass system which is still on the truck. In short i'm not an airdog fan!

are they any better or worse since they sold?

Worse

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There are Thousands of complaints on Diesel forums about Airdog Failures

Conclusion is Airdog is cheap junk worse than a stock pump

Get a Fass

thats crazy everyone i know has airdog with no problems thats why i was leaning toward airdog i dont know anyone with fass but i definitely dont want to put an inferior product on

Seen a ton of air dog failures here.

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i may be lookin into a fass then.

Almost 5 years on my FASS HD150, through the frigid Canadian winters, absolutely no problems.

Wow, you guys got me concerned, I have an airdog1 150gph on my truck,so far I haven't had any trouble. I got one of the ones when they switched to the quick connect fittings. again so far no trouble. when I bought it i was told it was the one to get. guess will well see. I do keep an eye on my FP gauge. I do it out of habit now.

I prefer Kennedy Lift pumps, better lifespan

Check out a DTT Assassin

Luke

does the dtt use or offer a filter and water separator? i have seen claims of fuel psi being in the mid 20's too is this safe for the vp44's?

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and while were on the subject my truck has a pump mounted on the frame under the cab. how wold i know if it had a tank unit or not before the frame mount pump?

fass 150 titanium gets my vote. avoid airdog like the plague. they have failed pump threads popping up daily on cumminsforum.

The Kennedy uses the same pumps we used in the chemistry lab I worked in for a few years. We couldn't afford to be down because of a pump failure! The pumps are modified to accept diesel but they are essentially the same. We had one that went 6 YEARS nonstop. I believe Kennedy states his are good 40,000 hours but still much longer than anything other than FueLab pumps. These designs have less resistance on the moving parts thus wear and tear is minimized.
Dual Kennedy pumps get you to the 12+ psi range. I'm not sure about y'alls engines but for mime this is sufficient. Anyway the fuelab and Kennedy pump designs are far superior to the others I believe. Either brand has a lifespan much greater than traditional lift pumps.

Do you work for Kennedy?

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Why is it people can always go on and on about the other two leading brands but mention another one and ohhhhhh no! They OP seemed concerned about longevity and I feel the above mentioned pumps will outlast the others. Simple. In the chemistry lab we could not afford to be down and with my truck I cannot as I use it to feed my family. Secondly I find John Kennedy to be a bit of an ass and would never work for him but he's a die hard diesel guy and I trust him much more than a product designed to sell to the masses who typically purchase products based popopularity: led by the media. I do my research and work I run my truck 400

Yikes... I was just asking, didn't mean anything by it.
I agree it's a nice pump but with lifetime warranties and limited failures in the fass line I'm not sure it's any more reliable than the others. If your upset no one paid mind to your first comment about the pump can't do much about that lol. They'll all fail at some point I do like those pumps though. How many miles do you have on your pump?

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My phone kicked me off. Almost everyone I know uses the AirDog after switching from the other latest crazy and the airdog is much better. I'll take my 256-8753 or 175-2949 water seps next to my 1R-0749 Cat filters and my 1R-0749/50 Cat replacing the stock coming in at about $13 bucks any day. Now maybe you were just busting my.balls but the close mindedness never ceases to amaze me. I was simply trying to help being that the Kennedy pumps are more obscure I thought I'd add some real world experience. :c:

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Its all.good man. Mine has about 151,000 miles on the set up thus far

I was asking if you worked for kennedy because you seemed to be knowledgeable of their product. Not sure how that's ball busting?

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I'm sure its just me man no problem. As someone who has been self employed for 15 years my wife is correct in saying "you don't always listen to others well" that coupled with the fact that as a 41 year old man on now shoot up testosterone weekly yes from the doctor but Sunday when I get my shot and Monday I can be a bit testy sorry bro. and I guess I do consider myself knowledgeable about his products but honestly I do research anything thoroughly that goes on to my personal work truck or any other ones I own

I'm same way and it's worse on forums lol.

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Liang makes the Kennedy lift pumps and they had to be modified for diesel. I've used Gulf Coast on my Peterbilt. FueLab on my 37 Buick and I'm just not a brand name guy I guess. I remember right after I graduated college and was working in the lab when the pump broke hearing the owner say "that little thing has worked non stop for 6 years that's more than I can expect from any of y'all! I read Donna forum that Kennedys used the same pumps and I thought it was my best choice. My truck has to stay running because oil/gas

Oil/gas companies don't give many second chances and my business is built on years of being the guy they know WILL be there on time, safe and fast. There's nothing wrong with the Airdog as its flow through and you can get decent filters for it. I've used the same Cat filters on many engines and trust them. Being that a double deck car hauling truck and trailer set up can get costly quick you need to keep it on the road. My chevy isn't nearly as expensive but it not arriving on time could be devastating to some smaller rig outfits. Two of my best guys use Airdogs, that I bought and approve of. Its simply a matter of longevity and my desire to crawl under my truck. Plus I only needed the one with 2-4 psi as I don't have mods that require as much pressure as some. Glad we worked it out as men I was only trying to help and I shouldn't have been such a cry baby. Forgive me as I'm accustomed to "yes sir" them someone walking off to disagree and use what they want.

any info on the dtt assassin. reliability? etc..

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OKAAAAY...no one has anything at all to say about the assassin. what about the fuel boss or mitusa? hp loss, reliability, fuel pressures. anything?

I don't care for mechanical pumps. Reliability may be a touch better but you still depend on an electric pump so I'm not sure if that's a valid argument. They are a bit more of mess to plumb. Most of my reasoning is based on preferences though.

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it's my understanding that the factory lift pump only kicks in if there is a pressure drop on the mechanical correctso the stock pump isn't actually being used until it is needed if it is needed or am I wrong

That's correct, so when starting the electric pump is in use.

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Does the eletric pump run for every startup? Or just the initial prime after install.does the mechanical pump not start the truck on its own?

Every startup from my experience. Maybe for a shorter time after initial prime but the truck basically starts on the electric pump and once pressure is achieved (engine rpm up) the electric pump cuts off.

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I wasnt aware of that thanks for the info.

Anytime. Another thing worth nothing is a belt driven pump changes the dynamics of service if your not doing your own work. For instance if you take it in for a belt change there will likely be additional charges. Fuel system diagnosis, likely additional time and a technician that's not familiar with the setup will probably charge more to diagnose and repair or may not even be willing to work on it. You may get someone who tries to fix it without doing proper research and cause more problems. While most of this is rarely going to be an issue it's worth considering. Diagnosis of electric fuel pumps is pretty straight forward and can be done by any automotive technician.

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talked to glacier diesel performance and the stock pump is not required for startup only there as backup in case of failure. a lot of people are running them without stock pump.

Worked on a 06 2500 for a dealer about 6 months ago. Pump ran at every start up. It had a glacier kit. Was not very impressed with the quality of that kit. The dtt looks like a much better kit to me.

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maybe it wasnt installed correctly not sure. i am gonna talk to dtt to see what they have to say about there system too.