FASS vs AirDog.....You Decide!
 

Okay folks, as I like to do whenever I get my hands on two competitive products, here is a review of the latest two.

This will encompass the AirDog 150 and the FASS 150.

I will start off by saying that I like BOTH of them. They both have a few minor points of contention that may make you, the end user, go one way or the other, but I don’t think you can go wrong with either.

Here are the two kits, as they arrived as off the shelf items. Both kits arrived VERY well packaged and complete. Each had a few spare connectors for attaching the pump in different manners.

AirDog 150…..

Attachment 52171

Attachment 52172

FASS 150…..

Attachment 52173

Attachment 52174

A few things to note about the components….

1 – The FASS comes with 3/8” fuel line and the AirDog comes with 1/2". Both had enough to leave approx 1 – 2’ of fuel line remaining after the install. I like the AirDog’s fuel lines better.

2 – The AirDog comes with much nicer fittings for the fuel lines and the connectors lend themselves well if you decide to use steel braided lines and AN fittings. Both use push lock adapters for the lines and they do require quite a bit of pressure to get them fully seated. I suggest using a heat gun on low to warm and soften the line and a little bit of oil on the fitting to aid getting the hoses on.

Attachment 52175

Attachment 52176

3 – The FASS comes with a steel pick up tube and the AirDog comes with a plastic one. Both were long and required cutting to the appropriate length. The AirDog pick up tube is easier to work with for the home installer that may not have metal cutting tools. The FASS tube can easily be cut with a hack saw, cutoff wheel, etc.

Regardless of which one you use, you want to leave AT LEAST 1/8” gap from the bottom of the tank and I SUGGEST that you fish mouth the tube to prevent possible suction to the tank bottom. To fish-mouth the AirDog, just use a sharp knife and cut the end of the tube at a 45* angle. To fish-mouth the FASS tube, just use a drill bit and drill a half circle at the end of the tube.

4 – Both come with a pair of steel, powder coated brackets for attaching to the frame. The FASS comes with a bracket that is specific to the model of vehicle, the AirDog is more generic, but allows more flexibility for user preferred install location. For ease of installation, I prefer the FASS setup, but for flexibility, I prefer the AirDog setup. This is your choice here. Also, the FASS comes with a rubber isolator pad that goes between the bracket and frame for noise / vibration isolation.

Attachment 52177

Attachment 52178

5 – The FASS comes with ENORMOUS filters compared to the AirDog. They are EASILY 1.5 times the size of the AirDog filters. These filters are also easily cross referenced with other filter manufacturer’s types if you prefer to switch them to different type. I swapped mine for hydraulic filters that had a much lower micron rating (2 micron) and had much thicker case for higher burst pressures. If limited space is a consideration, the AirDog is a much smaller unit and fits the bill. For longer intervals between filter changes and filter availability, the FASS might be a better choice.

Attachment 52179

Attachment 52180

6 – The AirDog is MUCH quieter than the FASS on my truck. The FASS sounds like a small lawnmower engine before the truck is started. Once the truck is started, it’s noticeable outside, but not on the inside. It actually works as a little conversation piece when folks hear it for the first time.


7 – Wiring. Both are similar, with the exception that the FASS does not require cutting the power wire to the OEM pump. If for some reason it was necessary to use the OEM pump, it’s much easier to swap on the side of the road with the FASS, as no electrical connection need to be spliced.

Attachment 52181

8 – PRICE! The Airdog is much cheaper than the FASS, so this will likely be a major consideration in your purchase.

All in all, I like them both. I’ve installed several of both and I’d use either without hesitation. Both have a few items that are better than the other, but nothing that should prevent someone from purchasing either.

great write up :U:

Nice thanks for the info its should help alot of people.:U:

Airdog!!!:U:

Great stuff - thanks for taking the time to post it for us...:U:

Nice write up! :U:

:c:

Actually if you go with the Fass 95/150 its a smaller unit compared to the Fass 150/150.


Great Writeup. You can't go wrong with either setup :U:

AWESOME write up!!!

Glad to see a side by side of the two! I would love to get something for my 06.

Air dog has been workin' for me for two years now.

:howdy:Thanks for the pictures and details. I am considering an air dog very seriously. I have an 03 with fuel issues and don't want to go with a stock in tank pump.
:U:

Excellent Write-Up on the Twins and Now Fass/AirDog!:U::U::U:

nice right up :U:

Airdog on the 01, Fass on the 02 .Great write up.:U:

Which one do you like better Mike?

The airdog,hands down. I dont have to here the pump run.

Everybody says the Fass pumps are noisy. I have a 150 FASS on my 01 CTD and it's wisper quiet compared to the Air dog 150 on my buddies 04 CTD. Makes me wonder if it's working. :humm:

The New FASS pumps are much quieter than the older ones.

IDK it was on the truck when I purchased it 4 years ago. Along with the fuel pressure gauge that the local dodge dealer fried. :argh:

Is there a power gain with the ether? i have a stock truck and everyone says to put an airdog on first before adding power.. does this add any power tho?

So, with either the air dog, or the fass-do I get to #@$& can the in-tank pump? I've been fighting an irritating, hard to diagnose "stumble" at idle, and the power seems a bit lower than normal...I had to downshift to 5th to keep up with a duramax. we were pulling a 9% grade, with nearly identical sized trailers in tow.(oh-the shame...) :booo:

personally the way i see it is even if it doesnt give you gobs of power its still going to help. when you seperate the air/fumes from the fuel you get clean pure fuel which is always better for your power plant

got my airdog 150 on the way in the mail today! pumped up to see if its going to add anything to my truck but if i doesnt i still know it will next year when its time for the twin turbos! :U:

On both of these systems does the draw straw have to be changed on both systems

Depends on which one you get. I believe with both the FASS 150 and Airdog 150 you have to drop the tank. With the 100 of each you dont have to drop the tank.

I personally would go for the 150 and drop the tank or raise the bed - its really not that big of a job.

I just put the FASS platinum on and even with dropping the tank only took us 2 1/2 hrs to install. Its very quiet compared to my buddies airdog and i noticed a little better gain in low end and also gained about 1-1.5 mpg. I really like it so far no complaints and i debated for a long time over airdog or fass.

I just put a Air Dog 150 on mine and as skinnysfd has said I gained on the bottom end as well and my mpgs went up as well I am very pleased with the ease of install on it. And too it only took me about the same 2.5hrs in my gravel drive way by myself and that is lifting the bed. I would recommend these systems to those who are looking. I just put a quad adrenaline in last week and the fuel press holds steady and does not drop at all. :rocking: :choochoo:

Great info! Thank you so much. :tu: