Radium Fuel Hanger Surge Tank - Mazda RX-7 FD

Radium Fuel Hanger Surge Tank - Mazda RX-7 FD

Application: Mazda RX-7 FD3S – 1993-1995 US market, 1992-2002 JDM
Part Type: In-tank fuel hanger surge tank – up to 3 surge pumps plus 1 lift pump (pumps not included)
Part Number: 20-0950, 20-0951, 20-0952

The Radium Fuel Hanger Surge Tank is designed for the stock Mazda FD RX-7 fuel tank. It supports up to three high-pressure surge pumps plus one lift pump, with an integrated 1.85 litre surge tank to prevent fuel starvation under high lateral G-forces. It installs without grinding, bending or modifying the boot floor sheet metal.

Low-pressure fuel returning from the regulator is routed back into the surge tank to keep it full, and a second 24-hole deflector reduces air bubbles and foaming – all inside the OEM tank. Three versions are available to suit different pump families.

Key Features

• Drop-In OEM Replacement: Installs in the stock tank without modifying the boot floor
• Multi-Pump: 1-3 surge pumps plus 1 lift pump
• Integrated Surge Tank: 1.85 litre surge tank canister inside the OEM tank
• Return Fill: Regulator return fuel refills the surge tank; 24-hole deflector reduces bubbles and foaming
• Lift Collector: Anodised aluminium lift pump baffle and check ball
• Plumbing: 10AN ORB feed port with low-profile 8AN male fitting, 8AN ORB return port with low-profile 6AN male fitting, 8.5mm barbs for the OEM lines
• High-Current Electrical: Sealed stainless studs with non-conductive acorn nuts, ETFE-insulated in-tank wiring
• Fuel Compatibility: Petrol and ethanol compliant

Available Configurations

• 20-0950: Walbro GSS342 (255 LPH), AEM 50-1200, AEM 50-1230 and AEM 50-1235 (the 50-1230/1235 need one 20-1533 check valve per pump)
• 20-0951: Ti Automotive E5LM – includes fuel pump outlet adapter check valves
• 20-0952: Walbro F90000267, F90000274, F90000285, F90000295 (needs one 20-1534 per pump), Protec 11928 and Fuelab 49614 (need 13-1187), DeatschWerks DW810 (needs 20-1534 and 13-1187)

What's Included

• Fuel pump hanger with integrated surge tank (pre-assembled; installer completes final assembly)
• Hardware to assemble the pumps into the hanger
• Filter socks
• Miscellaneous installation hardware
• Barb fittings to reconnect the OEM feed and return hoses
• Electrical hardware for the pump(s), OEM level sender and OEM temperature sensor
• Fuel pump outlet adapter check valves (20-0951 only)

Optional Parts

• Radium Fuel Hanger Surge Tank Feed w/Filter - Mazda RX-7 FD 92-02 (20-0455-03) – optional 8AN feed kit with subframe-mounted filter and heat exchanger (stainless -03 or microglass -05)
• Radium Engineering Check Valve - 6AN ORB to 8.5mm Barb (20-1533) – check valve for AEM 50-1230/50-1235 pumps (20-0950)
• Radium Engineering Check Valve - 6AN ORB to 10mm Barb (20-1534) – check valve for F90000295 and DW810 pumps (20-0952)
• Radium Engineering Fuel Pump Filter Base Adapter – 12mm Brushless Pumps (13-1187) – base for Protec, Fuelab and DW810 brushless pumps (20-0952)

Important Notes

• Fuel pumps are not included
• A lift pump is required on all installations
• Each kit has wiring and connections for the same pump in both the lift and surge positions – mixing pump types requires additional parts
• Enough components are supplied to run all four pumps, so some parts may be unused depending on your setup
• Installation instructions are available in the Instructions tab

Vehicle Fitment

• Mazda RX-7 FD3S (1993-1995) – US market
• Mazda RX-7 FD3S (1992-2002) – JDM

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