Baldwin makes a 5 micron drop-in filter for our trucks...that's about the best one I have heard of for a while.
I run a HF6604 on the FASS...it is rated at 3 micron, but is actually 99.5% @ 5 micron, 98.6% at 3 micron (absolute), and 95% at 1 micron...and that is at 30 gallons per MINUTE, so it is effectively more efficient at our lower flow rates (95 gallon per HOUR on the FASS 95/150).
I know guys have used Cat filters in the past (1 or 2 micron) with good results...they usually place them between the OE filter and the injection pump. These tend not to affect flow or pressure because they are physically BIG.
The 2 micron Racor filter some guys use on the water separator side of the FASS is not recommended because it isn't designed for suction, and you can starve the FASS...not to mention it is only rated at 90GPH IIRC.
Originally Posted by madmanwithmouse
well im planing on getting a 2micron filther kit then feeding it with a fass pump.
And if you are referring to the Perma-Cool fuel filter, if you read the adds, they trap particles AS SMALL AS 2 micron...even a screen door will catch a 2 micron particle once in a while...
With the HF6604 FASS filter, you would essentially be filtering to around 1 micron, then running it through a 2 micron filter...the second filter wouldn't really do much.