Mallory 4309 Regulator

Discussion in '1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-' started by sen2two, Feb 1, 2014.

  1. I'm helping a friend set up his blow through turbo setup. He has the 4309 Mallory regulator that he wants to install because it is a rising rate regulator. but he is currently running a returnless fuel system. Can the Mallory 4309 be used without a return fuel line?
  2. Nope.

    I'm using the same regulator.

    A regulator is one design or the other. A return system is a better system anyway for a street car based on aftermarket availability. The fuel runs cooler, and the pump isn't busting its ass against a restricted orifice the whole time.

    Run a return line.