Drill a hole into Fuel Filler Neck?

67,

Well unfortunately, the FiTech needs a quasi return line although they call it a vent. In some conditions the FCC can & will spit some fuel out along with it's need to breath so it's 340 lph pump does not lock up or otherwise stop. So there will be a bit of liquid spewed into the vent (return) line. I want this small bit of fuel to either vaporize (hopefully) and go into the tank, or push the liquid into the tank as the volume increases or maybe pull back or vaporize into the FCC. For me to add a vent (return) to the neck will require the possible fuel to "climb" up to a suitable place to add a inlet to the filler neck. So that is maybe another 6" maybe over the top of the tank to find a place on the tube inside the trunk. By running it into a tank sending unit instead will lessen the upward flow. There is already an elevation of several inches from where the fuel/vent lines come up from the frame rail to get level with the top of the tank. I hope that clears up my dilemma. It's a returnless system but still needs some relief. To go to true return setup I would need to abandon the FCC and go with a tank hp pump or an inline hp pump direct to the FiTech throttle body and then a proper returnline added from that to the tank.

FYI,

Marion