Description

COMPATIBILITY

93-95 Mazda FD RX-7 (US)
92-02 Mazda FD RX-7 (JDM)

OVERVIEW

The Radium Engineering fuel surge tank hanger can be used with up to three aftermarket high pressure pumps and 1 lift pump in the stock Mazda FD RX7 fuel tank. The unique integrated 1.85L surge tank completely eliminates fuel starvation. No grinding, bending, or modification of the trunk floor sheet metal is required.

A fuel surge tank (FST) is the best solution in preventing fuel starvation. Because the FD RX7 can experience high lateral G-forces, it inherently suffers from fuel slosh. Fortunately, Mazda manufactured a gas tank with a very large bolt flange pattern (similar to the FCST) permitting various upgrading options.

The returning low pressure fuel from the regulator is sent back into the FST keeping it full. A second 24 hole deflector is used in this location further preventing air bubbles and foaming. All of this happens inside the OEM gas tank.

INDEPENDENT INSTALLATION VIDEO

	20-0950 FHST FD RX7, Fits Walbro GSS342 or AEM 50-1200 COMPATIBLE PUMPS Walbro GSS342 255lph AEM 50-1200 AEM 50-1230⁽¹⁾ AEM 50-1235⁽¹⁾
	20-0951 FHST FD RX7, Fits Ti Automotive E5LM COMPATIBLE PUMPS Ti Automotive E5LM⁽²⁾
	20-0952 FHST FD RX7, Fits Walbro F90000267/274/285 COMPATIBLE PUMPS Walbro F90000267 Walbro F90000274 Walbro F90000285 Walbro F90000295⁽²⁾ Protec 11928⁽³⁾ Fuelab 49614⁽³⁾ Deatchwerks DW810⁽³⁾
	20-0475-03 FUEL HANGER FEED KIT, 10 MICRON STAINLESS FILTER The feed kits use high flowing 8AN fuel lines. A Radium 1/2' fuel feed hose runs from the fuel pump hanger outlet to a Radium Engineering fuel filter secured to the rear subframe. From there a pre-made 8AN PTFE feed line runs all the way to the engine bay where it is up to the user to adapt the 45 degree hose end to their specific fuel system. The fuel lines clear the OEM fuel pump cover and all suspension related parts. No cutting or drilling is required to get the feed line past the fuel tank. The included Radium Engineering fuel filter assembly mounts to the rear subframe underneath the vehicle using a specifically designed FD RX7 bolt-on billet mount. The filter is mounted through a Radium Engineering heat exchanger to keep fuel temperatures down. INCLUDES Fuel Filter (-03 Stainless) Fuel Filter Heat Exchanger FD RX7 Fuel Filter Mount 8AN PTFE Fuel Feed Hose Radium Fuel/PCV 1/2' Hose Black 8AN Adapter Fittings Black 8AN Hose Ends Stainless Steel Hardware
	20-0475-05 FUEL HANGER FEED KIT, 6 MICRON MICROGLASS FILTER The feed kits use high flowing 8AN fuel lines. A Radium 1/2' fuel feed hose runs from the fuel pump hanger outlet to a Radium Engineering fuel filter secured to the rear subframe. From there a pre-made 8AN PTFE feed line runs all the way to the engine bay where it is up to the user to adapt the 45 degree hose end to their specific fuel system. The fuel lines clear the OEM fuel pump cover and all suspension related parts. No cutting or drilling is required to get the feed line past the fuel tank. The included Radium Engineering fuel filter assembly mounts to the rear subframe underneath the vehicle using a specifically designed FD RX7 bolt-on billet mount. The filter is mounted through a Radium Engineering heat exchanger to keep fuel temperatures down. INCLUDES Fuel Filter (-05 Microglass) Fuel Filter Heat Exchanger FD RX7 Fuel Filter Mount 8AN PTFE Fuel Feed Hose Radium Fuel/PCV 1/2' Hose Black 8AN Adapter Fittings Black 8AN Hose Ends Stainless Steel Hardware

⁽¹⁾These pumps do NOT feature a check valve. One of part number 20-1533 is required for each of these pumps used. You can order it from the optional parts on the right.

⁽²⁾These pumps do NOT feature a check valve. One of part number 20-1534 is required for each of these pumps used. You can order it from the optional parts on the right.

⁽³⁾These pumps do NOT fit into the included pump strainer. Part number 13-1187 is required to use these pumps. You can order it from the optional parts on the right.

PLUMBING

To simplify aftermarket -AN hose plumbing, the 10AN ORB threaded feed port features a low profile 8AN male fitting and the 8AN ORB threaded return port features a low profile 6AN male fitting. To reconnect the OEM feed and return hoses, barb fittings are also included.

The custom designed stainless electrical studs easily handle the high current demand that compact bulkhead connectors lack. These serviceable connections are properly sealed and impervious to all standard and exotic fuels. Nonconductive acorn nuts are provided to prevent any accidental short circuits. Furthermore, the high quality in-tank wiring is insulated with chemically resistant ETFE. Electrical hardware is included for the fuel pump(s), OEM level sender, and OEM temperature sensor.

FEATURES

Drop-In OEM Replacement
Permits 1-3 Surge Pumps plus 1 Lift Pump
8AN Male Pump Outlet Fitting
6AN Male Return Inlet Fitting
Fuel Starvation Protection
High Current Electrical Hardware
Compatible with Various Pumps
Anodized Aluminum Construction
Gasoline and Ethanol Compliant
Anodized Aluminum 8AN Male Fitting for Feed
Anodized Aluminum 6AN Male Fitting for Return
Anodized Aluminum 8.5mm Barb Hose Ends for OEM Feed/Return
Anodized Aluminum Surge Tank Canister
Anodized Aluminum OEM Fuel Sensor Mount
Anodized Aluminum Lift Pump Baffle and Check Ball
Fuel Resistant Submersible PTFE Tubing
Fuel Resistant ETFE Insulated Wiring
Stainless Electrical and Mounting Hardware
Stainless Steel Mesh Triple Pump Filter
New Anti-rotation Electrical Terminals

NOTES

Fuel pumps must be ordered separately. Some compatible pumps are sold on our website, but not all compatible pumps are available from Radium.
A lift pump is required on all installations.
Each kit includes wiring and pump connections to accommodate the same pump in the lift and surge tank positions. If you wish to mix different form factors of pumps, additional fittings, hoses, wiring, etc. will need to be purchased separately.
The kits will come preassembled as shown below. Final assembly is performed by the installer.
There are enough components included to run all 4 fuel pumps. Depending on the setup, some parts will simply not be used.