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Discussion Starter #1
Im sure this has been asked many times. but what pump is the better of the two?
Everybody around here has the fass so i dont really know much about the airdog but it sounds like its a good product.
also what size would u recomend?
 

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I prefer the FASS system but the Airdog is good as well. I have not come across to many people that have the airdog system so I cant tell you to much on them. Im running FASS 150/150 and i love it, never had any problems. It is a old one and its a bit louder then airdog but fass have been working on their system to quiet them down.

all in all I think they are pretty well matched together but airdog is $150-200 cheaper
 

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Air Dog 150, its only 10 bucks more than the 100 and will support over 700hp, and its 100.00 cheaper than a FASS, they are pretty close to being the same thing, (short version)Father owns Airdog, son owns FASS, had disagreement, they split and formed the two companies. They both are great products and will do the job, and do it very well. DD
 

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i have an airdog 150, only thing with the 150 is you need to drill a hole in the tank, 100 you dont..airdog is super quiet compared to FASS. i heard one last weekend for the first time and its loud...my airdog is nice and quiet, oh and airdog comes with 1/2" fuel lines and i think FASS is 3/8".
 

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i have an airdog 150, only thing with the 150 is you need to drill a hole in the tank, 100 you dont..airdog is super quiet compared to FASS. i heard one last weekend for the first time and its loud...my airdog is nice and quiet, oh and airdog comes with 1/2" fuel lines and i think FASS is 3/8".

Yah well I put in an AD-100 with a Liberty canister, hooked up the feed to the AD to the factory location on the canister, thought I'd avoid the low fuel pressure at ¼ tank but that's not the case. When I get to just a little over ¼ tanks my FP drops to zero, then goes back up, then to zero again.
Problem is my AD return goes to the filler neck, so what's happening is when I get low enough on fuel that it's below the level of the canister the AD sucks it dry and the extra fuel the engine's not using goes into the filler neck. Eventually the engine return puts enough into the canister the AD pumps again and on it goes. The truck doesn't stall cuz the CP3 is able to suck fuel from the AD filter.

This weekend I'll be dropping the tank (for the 5th time) and installing a draw straw into the canister for the AD return so it's filling the canister when the fuel's low.

Will take some pics and post if anyone's interested...
 

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Yah well I put in an AD-100 with a Liberty canister, hooked up the feed to the AD to the factory location on the canister, thought I'd avoid the low fuel pressure at ¼ tank but that's not the case. When I get to just a little over ¼ tanks my FP drops to zero, then goes back up, then to zero again.
Problem is my AD return goes to the filler neck, so what's happening is when I get low enough on fuel that it's below the level of the canister the AD sucks it dry and the extra fuel the engine's not using goes into the filler neck. Eventually the engine return puts enough into the canister the AD pumps again and on it goes. The truck doesn't stall cuz the CP3 is able to suck fuel from the AD filter.

This weekend I'll be dropping the tank (for the 5th time) and installing a draw straw into the canister for the AD return so it's filling the canister when the fuel's low.

Will take some pics and post if anyone's interested...
I'd like to see that I have the same problem- I'm working on machining a piece for the end of the straw to pull from a wide area like the stock pickup screen does....

By the way it's A LOT easier if you have help or a shop crane to just take the bed off- and you can do a better job because you are installing the stuff in the position its going to stay.
 

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By the way it's A LOT easier if you have help or a shop crane to just take the bed off- and you can do a better job because you are installing the stuff in the position its going to stay.

Yeah, I saw Willy's thread but I have a big boat rack and canopy so it's too much work taking it all apart to get the box off.

I'm getting good at dropping the tank and I use the AD return to pump fuel into a gas can to get it real light. Last time I hade the canisterinstalled, tank in place with the truck running in an hour...
 

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Airdog!! Like stated above father invented both son was involved and split... Any ways hi ho hi ho off to install my airdog I go!!!:lol3: :thumbsup
 

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I like the FASS. Been around for a long time, been on the boads for a long time, dan is on the boards to help where he can and is a great guy, can support a ton of power, and a great warranty.
 

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Discussion Starter #10
would it be better to buy the 150 gph pump even though all the sites ive looked at side that they are for moderate to heavy modified trucks? it wouldnt hurt the pump if its pumping more fuel than the engine needs, cause im asuming it just dumps back to the tank.
 

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Yes but if you get the 150 you can't really draw from the factory (or Liberty) caniste without adding a draw straw to fees the pump and another for the pump return..
 

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I love my FASS, have a few friends with Airdogs and they like them. Mine is louder but I think it is because of they are mounted in different places. FASS rear wheel weel. Airdog undertruck inside frame rail.
 

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I installed a 150/150 on my truck about two weeks ago. I don't know how loud the old ones are but I can only hear mine when I turn the key on and wait for the start light to go off. It is a nice sound that tells me everything is alright!!
 

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Also correct me if I am wrong but I just read in dieselworld that FASS only has a 6 year warranty??? Airdog has a lifetime...

Got mine installed and it' is cake!!!:woot: 18 psi:hyper:
 

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And not to mention the AirDog 150 has those queer looking lawn boy filters....

Sorry. I run a FASS 150/150..... The first 150 tells you its tha man sized long filters, and the second number tells you its a 150 GPH.

I also have a 150/200 setting here for my twin pump setup.... But for now she just sets there staring lovingly into my eyes.

The Airdog is a fine part, Fass is the "tried and true". There are many over the road trucks that use FASS. I know that August Transport uses ONLY FASS systems in all of his race and sled pulling big trucks. These guys are into VERY serious semi racing and semi sled pulling... and FASS rules the roost.

Industry wide FASS is the king. Those that can afford it most likely would not "save $100" on a Airdog.... just because FASS is on 90% of the race winning diesel pickups and semi trucks on the planet Earth. Airdog is not cheaper by choice. They are cheaper because they HAVE NO CHOICE but to buy users by offering lower prices. If they can do this and get a good user base, they can slowly work the prices up to a comparable level... But for now everyone knows that you go Airdog because its cheaper.

FASS and noise- The older FASS systems were noisey. The ones made in the last year or so have been quieted down MAJORLY. Brett from Wyotech has a 150/150 in his 04.5 Dodge. His you can hear in the truck while setting at a red light with the windows closed. I have a 150/150 on my 05 and I cant hear mine standing beside the FASS with the engine running. Mine is the newer FASS, Brett has the older one. Brett loves his.... and in his words... "I WOULD HAVE IT NO OTHER WAY!".
So what your saying is you like them big filters hanging out the bottom of the truck? And you say "tried and true"? You want to put your 150 on a stand against an AirDog 150 and see the difference? I dont think you do bud! And you 90% statement.... Not even close. AirDogs are selling like crazy now. Soon you will see them on everything. Keep an eye on Stuckey Racing. Notice how they keep breaking records and getting faster and faster? They are running AirDog now. Got to start with a little and make your way to the top, and thats exactly what AirDog is doing. Everyone that has seen em on the test stand is blown away on the difference.
 

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I have been running my lawn boy filters for 30,000 miles before changing. I guess if having huge filters make you feel like a man, then buy a FASS.:lol3:

Also noise has nothing to do with location of the pump. I mount them 50/50 inside and outside. Noise level is the same.

As for "tried and true" you may not realize this, but the FASS was copied from an out of date Fuel Preporator.
 

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Yeah I wish I coulds say I bought a FASS "Because the filters were bigger":toiletcla
 
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