Early Rotary & 1979-85 Mazda RX-7 : Fuel System

 : Fuel System : Mallory/MSD 4309 Fuel Pressure Regulator

Mallory/MSD 4309 Fuel Pressure Regulator

RB Part Number: 18151

Mallory
4309

Price: $126.00

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Mallory/MSD 4309 Fuel Pressure Regulator

The Mallory/MSD 4309 (MSD 29387) return-style design pressure regulator (shown with optional fuel pump) extends the life of the fuel pump and eliminates pressure drop that can occur at high RPM "launch" starts. A high quality pressure regulator is a crucial component for use with high-pressure fuel pumps in order prevent possible carburetor flooding. Designed with flow-matched inlet and outlets for ideal pump matching. Fully serviceable. Complete with mounting bracket and hardware, detailed instructions and fuel pump bypass spacer (optional). Design-matched for use with the optional Mallory/MSD 4070M Fuel Pump.

If the vehicle will be used for racing applications, (especially drag racing) adding this 4309 return-style Mallory Regulator and blocking off the internal bypass in the pump (and allowing the pump pressure to increase) is recommended. This set-up will greatly reduce the pressure drop off that can occur during sustained full-throttle runs. A 3/8" return fuel line is recommended for use with this regulator. (Hose fittings are not included.)

Additional Features:

- Range of adjustment; 3-12psi. (approximate)
- 3 outlet ports (in addition to return outlet and inlet)
- Port thread sized 3/8 NPT
- CNC-machined, billet aluminum construction
- Compact design

The Mallory Instruction Manual can be downloaded from Mallory's website by followin on this link.

Racing Beat Recommended Accessories:

Mallory/MSD 4070M Fuel Pump

Mallory/MSD 4070M Fuel Pump

The Mallory/MSD 4070M Fuel Pump (MSD 22256)  (shown with optional regulator) is an ideal unit for use with the Holley and Weber carburetor units that we offer. The Mallory 4070M pump is a high-pressure, 12-volt fuel pump that delivers 70+... Mallory/MSD 4070M Fuel Pump

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