Holley Black Fuel Pumps

Having just replaced a Holley HP-150 pump - with another HP 150, let me share some things that I got direct from their Tech people. While the HP differs some from the Black the principles are the same. Yes, install a prefilter - but no tighter than 80 to 100micron. I had an pre filter on my old one but it was a 40 micron mesh and they said that may have hurt the pump. I put an 85 micron on the intake and moved the 40 to the outlet. Also, make sure the pump inlet is as far below the fuel tank outlet as possible. These pumps rely on gravity feed on the suction side - they are not designed to suck fuel out of a tank - at least a couple inches below the tank outlet is desired. Level is only good if you plan on having at least several inches of fuel in your tank at all times. These series of pumps are designed for 3/8" npt fittings so -8AN lines. -10AN inlet line is really not needed and should not be looked at as a fix for poor location. The Techs were more focused on having the pump low than having a larger intake line size than -8AN. You can't make up for bad location by using a larger line size. Going larger than -8AN on the outlet is not needed, and in some cases can hurt, depending on the HP of your motor, return line or not and driving conditions.