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Chad Boblett
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Air Dog vs Fass

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Just got back from the truck show in KY. While there I purchased the FASS Fuel System. Then I came across the AirDog. Never knew about the AirDog but what a story they have about why there product is better and the bad blood between the two are. I never got a chance to ask the people at Fass about this so was hoping I could get some feed back from the people that have used these products. From what I know as of now is that they are both good and do the same thing but witch is the best buy on this.

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Robbie Miller
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Well I can tell you I had a FASS on my old Classic, I was very happy with it.

The Fass improved throttle response and the smoke in the exhaust, I can't say exactly how much it improved fuel mileage though. The install was easy enough.

I think the most important thing is always keep extra filters on hand, especially the water separator, they can be difficult to find when you may need them. They need to be changed or cleaned regularly and can affect performance if you do not. It is a good product in my opinion.

I have a FASS and am basically happy with it, I have had some issues with the FASS customer service but the reason I chose FASS is "filter availability", KW usually stocks Fleetguard filters that will fit the FASS, I usually install both at the same time and then change the fuel filter and clean the fuel/water separater at 25K, I change them both at the next 25K. The reason I don't care for the AirDog is that they use a specialty filter that can only be had from them. Also, as for the bad blood, the fellow who has FASS is the son of the inventor of AirDog, it used to be known by another name, that escapes me, the son pulled away and started the FASS system.

hamjtrucks,

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hamjtrucks
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AirDog started out as "Fuel Preporator". The original owner,FASS's Father, sold it to the people who now own it.

What your saying could be true but that is not the way they tell the story at AirDog. Sounds like more of a bad family or deal. Both sound like very good products.

Chad Boblett,

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hamjtrucks
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I have tried the Fleetguard FS1212 fuel/water separator and although it appears to fit, I'm not sure whether the FASS would work as well, might try to run it some day!

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hamjtrucks
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Chad, what did the AirDog people tell you? I'm sure that the Father and Son did not get along or the son would have stayed with the then "Fuel Preporater", Bruce with PP consulted with the son to improve FASS. I have faith in Bruce!!

I don't want to be apart of any rummer but the folks at AirDog seem to be pretty open about what happened and the father was there when I was told that the father became ill and the son then started up FASS. Sounded like they had allot to say about why the AirDog was better but I am sure FASS would have been able to say the same thing. I ran out of time and was not able ask everything I wanted to ask so that is why I am asking now. I know Bruce likes the FASS and Kevin as well. I trust them both too but would like to know more then just trust them.

Chad Boblett,

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hamjtrucks
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Chad, I don't think AirDog is being honest, the Father and Son did not get along at all and the Son left and started FASS, the old man was probably "sick" of Brad!!

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Your
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Keven is getting payed by all his sponsers. Air do is an old dog and fass is the new kid on the block that has hussled his busness.

Fuel Prepareter is the old "dog" they were purchased and the name was changed to "AirDog", I don't believe that Kevin can be "HUSTLED""

hamjtrucks,

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Joe Deede
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I have the fass on my truck for about a year. It is on a 2012 pacar mx motor. It really made differance in throttle response and I picked up about 3 tenths on fuel milage.

There customer service really SUCKS!!!!!! dont expect to get much help from these people. If I had known about the air dog I might have went that route.

Joe, I had the same response from their "customer service", I also would have checked on AirDog!!

hamjtrucks,

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Linn Prudhomme
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I just put the FASS on my Volvo 780. I had it on my 1 ton Dodge cummins engine 2000 model year.

The Dodge had 100 hp injectors and a power puck with a new injector pump all at the same time. The cummins needed the extra fuel with the upgrade in power.

Doing it that way I was spec'd with the FASS B rated motor and pump rated at 90 gal per hour.

I was told by FASS that it would be enough for the 465 HP Volvo D12 I have.

The A stamped on the motor and pump is rated for 150 GPH, I'm not sure if this is making a difference on my truck or not. It seems to be ok though...I see the FASS this way, it is going to get the water and air out and it will filter down to whatever micron filter you choose. It will if installed properly keep cool fuel going into the head rail.

I had trouble finding filters at first but now I use the BT 372-10 and the BF 1212 and they are not hard to find. Both are the smallest micron I could find locally.

I too did not like nor was impressed with the customer service guys with FASS, In fact I'm waiting for a call back which I don't believe I will get unless I call back.

Yeah rehm70, I put my Davco in the side box and it can be put right back on if necessary....funny thing though, I had a bad connection on the power line going into the FASS. this cut the pump off and I drove it however long...probably a day without knowing. I turned the ignition switch on and raised the hood and did not hear the FASS running, but the truck ran OK. I think a pressure switch is next for the fuel system. I see where there is a port on the FASS system for a connection. Go figure, the gear pump was pulling through the FASS, anyhow I fixed the wire and it is running.

Linn Prudhomme,

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Your
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Charlie, the old man that designed the original Diesel Fuel Preporator has fairly recently gotten just the class eight end of Air Dog back. The folks that bought it were struggling with the class eight pumps. The motor would not hold up due to seal failures at the pump drive failing and allowing fuel into the electric motor. The reason for that was excessive run out on the rather long motor shaft. When Charlie took the Class eight units back over he redesigned the pump drive to isolate the motor from the pump and eliminate the fuel contamination that was causing the failures along with zeroing out the motor shafts run out. The result is an amazing improvement of performance and dependability. The new units are very quiet and smooth. Charlie also designed a protection module for the motor that censes filter restriction, and when that restriction raises the amperage draw from the motor it shuts of the motor down so it will not over heat and self destruct. I choose to incorporate a cab mounted fuel pressure gauge in conjunction with Charlie's new system that also has a in cab monitor with colored lights that advise when a filter change is required. I have not used the FASS and have nothing to say about it one way or another. Charlie has always treated me very good and it has been a pleasure to work with him since my first Diesel Fuel Preporator in 1997. He also has a list of readily available name brand filters to fit his units if you need, or if you can get a deal on filters somewhere else.

Edited by: Your ( )

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rehm70
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My father had the original Fuel Preporator on his 1985 BCIII Cummins. It ate seals in the pump, and made zero difference in performance or fuel economy.

I have a FASS on my 2001 12.7 DDECIV. I also installed new liness. Like my father, I have seen zero difference in performance or economy. I do believe the filters do a better job of filtering than a standard system, otherwise I would sell it.

Im cautiously waiting for something to fail on it, since it is in constant salt spray.

rehm, I think that your failure will be the motor and you cannot buy a motor alone, you have to buy the motor/pump combo. Pretty pricey! I also had problems locating one to buy. We have 2 trucks and I won't install another FASS!! Good Luck with their "customer service"!!!

hamjtrucks,

I left my davco on the truck, and the fuel lines routed on such a way so I can hook it back up.

rehm70,

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