Radium Multi-Pump Fuel Surge Tank MPFST
Application: Universal - external fuel surge tank for vehicles with poorly baffled fuel tanks
Part Type: Multi-pump fuel surge tank (MPFST) - fuel pumps not included
Part Number: 20-1440, 20-1441, 20-1442, 20-0443-00
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, the stored fuel buffers the MPFST pump(s), and excess fuel returns to the main tank. It lets you upgrade a stock fuel system without opening the stock tank, making it well suited to big power upgrades such as forced induction.
The 2024 redesign supports multiple high-flow pumps. Their outlets merge into a single outlet, and because the pumps have check valves they can be staged. Fuel enters the supply and return ports tangentially, swirling to reduce air bubbles and foaming.
Key Features
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Multi-Pump: Up to 3 pumps (1 or 2 for the E5LM version), merged into one outlet
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Pump Staging: Pumps with internal check valves can be staged
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Anti-Foam Entry: Tangential supply and return entry swirls fuel to reduce air bubbles and foam
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Chambered Pre-Filter: Three independent filtration chambers - fuel cannot pass between them
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Swappable Fittings: Preinstalled 8AN and 6AN male adapters can be changed to other sizes
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Level Switch Port: Ready for the optional 20-0461 fuel level switch
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High-Current Electrical: Anti-rotation high-current electrical studs
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Fuel Compatibility: Internal wiring is petrol, ethanol and methanol compliant
Available Configurations
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20-1440: Walbro GSS342, AEM 50-1200, DeatschWerks DW440 - up to 3 pumps
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20-1441: DeatschWerks DW400, Bosch BR540 - up to 3 pumps (BR540 has no check valve so can't be staged; 3 pumps won't fit with the optional level switch)
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20-1442: Walbro F90000267, F90000274, F90000285, F90000295; DeatschWerks DW810, Fuelab 49614, Protec 11928 (brushless) - up to 3 pumps (F90000295 can't be staged; brushless pumps need the 13-1187 base)
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20-0443-00: Ti Automotive E5LM (BKS1001) or Injector Dynamics BPC100 - 1 or 2 pumps, brushless controller required, check valve adapters included
What's Included
- Surge tank
- Anodised aluminium pump mounting bracket
- Stainless mesh pump inlet screen (press-in filter sock on 20-0443-00)
- Anti-rotation high-current electrical studs
- Ring terminals and hardware
- Preinstalled fittings - 8AN male on the pump outlet, 6AN male on the supply, return and overflow ports
- Check valve adapters (20-0443-00 only)
Optional Parts
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Radium Fuel Level Switch, 1/8" NPT (20-0461) - signals when fuel in the surge tank drops by 20% or more
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Radium Engineering Fuel Pump Filter Base Adapter - 12mm Brushless Pumps (13-1187) - required for brushless DW810, Fuelab 49614 and Protec 11928 pumps in the 20-1442
Important Notes
- Fuel pumps are not included
- Plumb exactly as specified: stock tank pump outlet to the MPFST supply port, stock tank return to the overflow port, MPFST pump outlet to the engine/fuel rail, and MPFST return port to the regulator's return port
- On returnless vehicles, don't block the overflow port - create a return port on the stock tank instead (see Radium's returnless instructions)
- Unused pump ports on the inlet screen don't need to be blocked off
- The E5LM version (20-0443-00) requires a brushless pump controller
- Installation instructions are available in the Instructions tab
Vehicle Fitment
- Universal - see Application
For application support, send your vehicle details to TJ Auto Parts through the Parts Finder.
Supplier-listed applications:
- Universal - see Application
Note: Compatibility information is provided as a general guide only. Some vehicles may have multiple part variations for the same model or engine. To ensure this product is the correct fit and to be eligible for our Fitment Guarantee, please contact our team before purchasing.
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Warranty
All products come with the manufacturer’s warranty. If you experience any issues, please contact us at contact@tjautoparts.com.au. For full details on warranty coverage and claims, please visit our Returns page.
