Originally Posted by 04strokin
1693 the airdog2 is what I was thinking about it cleans your fuel and only allows what the truck needs to be used and reroutes the rest back into the fuel tank so you want be wasting unburnt fuel by rolling coal
Check out the link below it explains better
AirDog II Fuel/Air Separation and Filter System 6.0L Ford
Sent from my Autoguide iPhone app
Like many sales pitches that one takes a relatively minor occurance and magnifies the significance of it to make their point. First, you already have a delivery pump (lift pump, transfer pump, etc) which provides positive pressure to the engine pump. Second, return fuel, in the systems I work work with, is routed through either a bottom tank return, a standpipe, or is of such a low flow rate that any splashing that occurs is not going to produce noticable air. I believe Ford uses a standpipe. Third, this unit does nothing to regulate the injector pressures or delivery rates and will have no effect on "rolling coal". That's all a factor of of whatever tuning and modifying has been done. I'm not saying the unit is a bad thing. It probably gives superior filtration and would eliminate any possibility of air, but air in the fuel flow is a very minor issue and usually the product of a bad line or fitting. Your fuel tank probably rarely, if ever, sloshes as much as that demo showed, and fuel oil does not aerate as easily as shown. That in itself raises my suspicions about the demo. You have no way of knowing what the fluid is they are pumping.
Anytime you see a benchtest demo by the manufacturer of a product you can be assured that the test is being conducted in a manner that gives the very best picture of their product. Real world testing by independant testers usually gives a far different picture with much less impressive results. Could be a very well built product, but it pays to be skeptical.