Fix for the 1/3 tank issue with the FASS Pumps
Some of yall have made it REAL clear that when running the FASS (Not the HPFP) that you can only do so with more than a 1/3 of a tank of fuel. This is due to the fuel "Cup" they put on the end of the stock fuel pick-up. The FASS move soo much volume, the stock "Cup" can not refill in time when fuel level is below the top of the "Cup". SO....our fix? Part number STK-3001. This is a 1/2" Suction tube kit that totaly by-passes the stock pick up tube. The bottom of the draw tube sits about 1/8" from the bottom of the tank. This has worked very well with the Dodges.
ALSO the HPFP pumps have not had this issue. DUE to that the flow is static. Its a Demand only pump...it internaly by-passes to keep pressure to a point.....but lacks the return the FASS has. This return to the tank moves the excess 150 or 95 GPM volume back to the tank....thus draining the cup when fuel is low.