Radium MPFST-R Multi-Pump Fuel Surge Tank (Built-In Regulator)

Radium MPFST-R Multi-Pump Fuel Surge Tank (Built-In Regulator)

Application: Universal – external fuel surge tank for vehicles with poorly baffled fuel tanks
Part Type: Multi-pump fuel surge tank with built-in regulator (MPFST-R) – fuel pumps not included
Part Number: 20-1445, 20-1446, 20-1447

A fuel surge tank prevents fuel starvation in vehicles with poor tank baffling. A lift pump – usually the OEM in-tank pump – fills the surge tank, and its fuel volume keeps the MPFST-R pump(s) supplied through momentary lift-pump starvation. The volume is maintained by the lift pump and by fuel returning from the built-in regulator, with excess fuel returning to the main tank.

The MPFST-R is returnless: the built-in RA-series regulator sends low-pressure fuel back into the surge tank, so no external regulator return line is needed and the single feed line dead-ends at the engine. It accepts 1, 2 or 3 pumps.

Key Features

• Built-In Regulator: RA-series regulator with tool-less knob adjustment, approx. 1 psi per detent
• Returnless Feed: Single feed line dead-ends at the engine – no external FPR return line
• Swivel Vacuum Port: 360° swivelling, double O-ring sealed vacuum reference port, 1:1 capable
• Gauge Port: 1/8in NPT port for a fuel pressure gauge or sensor
• Multi-Pump: 1, 2 or 3 pumps merged through the regulator outlet
• High-Current Electrical: Anti-rotation high-current electrical studs
• Mounting: Mounting feet suit M6 or 1/4in fasteners
• Fuel Compatibility: Internal wiring is petrol, ethanol and methanol compliant

Available Configurations

• 20-1445: Walbro GSS342, AEM 50-1200, DeatschWerks DW440 – 1, 2 or 3 pumps
• 20-1446: DeatschWerks DW400, Bosch BR540 – 1, 2 or 3 pumps (BR540 has no check valve – primary pump only when staged; only 2 pumps fit with the optional level switch)
• 20-1447: Walbro F90000267, F90000274, F90000285, F90000295 – 1, 2 or 3 pumps (F90000295 has no check valve – primary pump only when staged)

What's Included

• MPFST-R surge tank with built-in regulator
• Anti-rotation high-current electrical studs
• Ring terminals and hardware
• 8AN male adapter on the pump outlet port
• 6AN male adapters on the overflow and supply ports
• 1/8in NPT plug
• Four interchangeable 10-32 vacuum fittings
• Screw to plug the vacuum reference

Optional Parts

• Radium Fuel Pressure Gauge 0-100psi (20-0029) – 0-100 psi gauge for the 1/8in NPT port
• Radium Fuel Level Switch, 1/8" NPT (20-0461) – level switch for a dash indicator, ECU input or lift pump control
• Radium Fuel Level Switch Plus Diagnostic Indicator (20-0519) – level switch with diagnostic LED

Important Notes

• Fuel pumps, gauge, level switch and LED indicator are not included
• The overflow port cannot be capped
• Vehicles without a return on the tank need a return port created (see Radium's technical data sheet)
• Plugging the vacuum reference gives constant fuel pressure
• Use PTFE thread sealant on NPT threads and bench-test the level switch signal direction before installing
• Installation instructions are available in the Instructions tab

Vehicle Fitment

• Universal – see Application

Not sure if this suits your vehicle? Email sales@coore.com.au and our team will confirm fitment.