The trucker I hire to haul my corn and livestock recently added a FASS system to his otr semi.
It is a inline fuel add on which removes all air and vapor from the diesel fuel before it reaches the final filter and injection pump.
With a weary ear, I listened to him explain how his truck was lacking from off idle torque. This system was supposed to improve fuel economy and power by providing 'pure, solid fuel' to the injectors.
After one year, he is more than satisfied with the performance and economy. His truck has improved by .5 mpg (huge for a semi tractor). and he has to shift far less in the hills. Pulling away from a stop is painless too. Just let the clutch out, and away ya go.
The system cost something like $850 installed on his semi, and fuel savings alone paid for it almost the first month.
Out of curiosity, I just checked out the website, and see they offer it for most diesel pickups. ($450)
It appears to be a rather large electric pump, and special filter.
FASS stands for Fuel Air System Separation.
They claim 2-3 more mpg for our diesel pickups, with more power too.
Anyone have any yea or nays on this product?
My trucker sure is sold on it!
These are a tried and true system that gets added onto quite a few top end diesels out here, the only issue is when you start running ultra high fuel rail pressures they ave been known to develop gasket leaks, but if you're not running anything like a dual CP3 or Snow Perfomance system, then they're a great thing.
I know on the 5.9L, they have netted 3-4mpg (depending on driving) to my co-worker's truck, prick's up to 27MPG on his '05 2500 :gy:
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