FASS creates a smoother diesel flow to the injectors by eliminating the air, vapour, dirt, condensation and water from the diesel fuel. Most fuel tanks are mounted between two and ten feet away from the Fuel pump and injectors.

The fuel is drawn (sucked) up towards the fuel pump, during which more air enters the fuel. These impurities in the diesel affect the engine so it does not performing at its best, as the injection of the fuel into the combustion chamber is retarded due to the impurities. The impurities also make the diesel inconsistent, therefore upsetting the timing of the injection of the diesel.

FASS eliminates impurities from the diesel fuel (down to 3 microns), thereby increasing Horsepower, increasing fuel economy, reducing the effects of "Hot Fuel", reducing enging and cbin noise, reducing emmissions and smoke, and assisting a smoother idle and quicker throttle reponse.

All this Extends the life of the filters and the fuel injectors, and stops a lot of wear and tear on the rest of the engine.

FASS enables excelent all weather performance, and ensures easier and quicker engine start ups.

"We’re getting 6% better fuel economy."
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Chet's Comments

Many years ago, I built a fuel tank for my Hino powered Commer tipper.  
When the fuel got down to about a third of a tank, the engine started playing up. It simply couldn’t handle the amount of air that was sucked up from the windy roads.

I built a small sump, about three inches deep (75 mm) and extended the fuel pick up into that.  This fixed my problems.  But, what about all of the other trucks, round tanks, and a pick up slightly offset, with no sump.  Surely they suck up a lot of air.

Years later, I’m researching engines for my Chevy ‘big foot’ truck.  Every high performance Ford, Chevy, or Dodge pickup listed a FASS unit.  What is that?

FASS gets rid of the air, sending it back to the fuel tank, and sending pure fuel to the engine.  Wow.  That explains it. All trucks have the same problem as mine. The problem simply isn’t big enough to ‘feel’ it.

I read everything I could find, and then bought one.  Sure enough, we gained 4% in power, almost instantly, and reduced fuel use.  Every FASS unit that we sold, has benefited the owner. “It’s half a gear better.” “I have to keep backing off, it goes so much better.”  “We’re getting 6% better fuel economy.”

I believe FASS is a no brainer.  Trucks fuel use is enormous.  Many daily fuel bills exceed $800 per day.  Six percent is $50 per day. Fifty bucks saved every working day puts an extra $1,000 in the bank each month, $12,000 per year.

What an investment, and the injectors last longer, the truck runs smoother, with less pollution.  Everyone wins.