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Radium Engineering MPFST Pumps Not Included Walbro GSS342 Or AEM 50-1200 Or DW440

$989.95
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Description

A fuel surge tank (FST) is designed to prevent fuel starvation on vehicles with inadequate fuel tank baffling. Fuel is supplied to the surge tank by a lift pump, which in most cases is the OEM in-tank fuel pump. The volume of fuel inside the surge tank acts as a buffer to always keep the FST pump(s) supplied with fuel, even if the lift pump starves momentarily.Ā 

This volume is maintained by the lift pump as well as the fuel returning from the fuel pressure regulator. Excess fuel in the surge tank is returned back to the vehicle's main fuel tank. The surge tank also provides a quick and easy way to upgrade any standard fuel system without opening the stock fuel tank. This is an excellent fueling solution for vehicles installing large demand power upgrades such as forced induction.

Recently redesigned for 2024, the Radium Engineering MPFST is the perfect solution for high power vehicles experiencing fuel starvation during aggressive driving. Multiple high flowing fuel pumps can be used in the surge tank.

The outlet from the fuel pumps merge into a single outlet simplifying external plumbing. And because the compatible pumps utilize check valves, staging is permitted.

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This MPFST allows the installation 1, 2, or 3 of the pumps listed below. It will include all necessary parts to install the pumps into the surge tank except for the pump(s) themselves.

PUMP COMPATIBILITY

  • Walbro GSS342
  • AEM 50-1200
  • Deatschwerks DW440

More compatible pumps are possible that are not listed here. Any pump that matches the same physical package can be installed as well.

Technical Specifications

The fuel pump outlet port is 10AN ORB threaded and comes preinstalled with a 8AN male adapter fitting. The overflow, supply and return ports are all 8AN ORB threaded and come preinstalled with 6AN male adapter fittings. All of these fittings can be swapped out with different sizes (sold separately).

It is very crucial that a surge tank be plumbed exactly as listed below. Installations must not deter from this installation or it will cause function issues and premature parts failures.

  • Stock tank pump outlet plumbs to the supply port on the MPFST
  • Stock tank return inlet plumbs to the overflow port on the MPFST
  • Pump outlet port on MPFST plumbs to the engine/fuel rail
  • Return port on MPFST plumbs to return port on fuel pressure regulator

Note: if you're installing this on a returnless car, you cannot block the overflow port. You must create a return port on your stock tank for the overflow port to plumb to. See the additional instructions PDF for details.

Fitment Table