Jim That is exactly how Vans sells his gascolator and furnishes the builder with a plug if no primer is desired or used.
Ken, a low pressure fuel injection system like aircraft uses can have the fuel dump above the fuel level. You cannot use this method with high pressure, high volume recirculation due to the foaming of the fuel that will result. This is a prime example of how different auto vs. aircraft fuel injection is. The gallons per hour that are recirculated to the tank alone are more than twice what the total capacity of delivery that the aircraft system can even make. They are apples to oranges! Do not compare them as being close to the same. They are not. Auto systems use electronic injectors that spray fuel on command, while aircraft use a less efficient, but simpler spray nozzle like a diesel uses. The auto system requires more pressure and the ability to restrict that pressure more during acceleration with a pressure regulator that is vacuum controlled. This is just the beginning. Jim, install a return in the tank that makes the fuel enter below the fuel level. If you want, add a tube that extends into the tank from the top, and bends and lays on the bottom of the tank, so that recirculated fuel does not cause foaming. Otherwise she will run perfect until the fuel demand uses up all liquid fuel and then it will be foam. I would hate for this to happen on climbout, or when it really mattered! Go to a junk yard and look at an in tank assembly and you will see the pickup screen on the end of the fuel pump, and right next to it is the nozzle for the return line, emptying back into the tank. Colin KSFB
