4309

      The 4309 is 3-port competition fuel pressure regulator (return style).The note is DO NOT RUN THIS PUMP WITHOUT FUEL (EXCEPT FOR BRIEF PERIODS WHILE PRIMING).This regulator must use a fuel return line. The fuel return line runs between the fuel return port of the regulator and the fuel tank. Fuel pressures cannot be adjusted if the fuel return line is absent.
      The 4309 have some general informations.Mallory's 3-Port, return style regulator regulates fuel pressure between high pressure fuel pumps and carburetors. The 4309 regulator is recommended for Mallory COMP PUMP® 110, and 140 Series Electric Fuel Pumps.NOTE: This 4309 regulator is not recommended for pumps over 200 gallons per hour.By returning excess fuel and fuel pressure to the fuel tank, this regulator benefits fuel pumps in several ways. The fuel pump will run cooler, draw less current and will always have full volume output available at the pressure setting. The fuel return line runs between the fuel return port of the regulator and the top of the fuel tank. The fuel tank must have provisions for a fuel return line.This 4309 regulator is equipped with a vacuum/boost compensation port (brass barb fitting) that can be used tomomentarily decrease fuel pressure (vacuum compensation) at idle and part throttle, or increase fuel pressure under blower boost (boost compensation). While it is not necessary to connect a hose to the vacuum/boost compensation port, it may be beneficial in some cases. However, the small plug on the barb must be removed before use.
      The 4309 has some information about part included in this kit.It has 1 3-Port Fuel Pressure Regulator,1 Bracket,2 Bracket Mounting Screws,1 Bypass Spacer (to modify COMP PUMP® 110 and 140,Series Electric Fuel Pumps).
      The 4309 has 3 specification.The first one is port thread sizes (ALL): 3/8" NPT.The second one is adjustment range: 3-12 PSI (approximate).The third one is fuel Application: Gasoline, Automotive/Street and Racing applications.