Product Overview
Radium Engineering Fuel Surge Tank Hanger for Mazda FD RX-7
If you're looking to enhance your Mazda FD RX-7's fuel delivery system, the Radium Engineering fuel surge tank hanger is a fantastic choice. This innovative design allows you to install 1, 2, or even 3 aftermarket high-pressure pumps, along with a lift pump, all within the stock fuel tank of your RX-7.
Say Goodbye to Fuel Starvation
One of the standout features of this surge tank is its integrated 1.85L capacity, which effectively eliminates fuel starvation. Plus, you won't need to worry about any grinding, bending, or modifications to your trunk floor—it's a straightforward drop-in solution!
Easy Plumbing and Connections
Setting up your aftermarket -AN hose plumbing is a breeze thanks to the thoughtfully designed ports. The 10AN ORB threaded feed port comes with a low-profile 8AN male fitting, while the 8AN ORB threaded return port features a low-profile 6" male fitting. To make things even easier, we've included barb fittings to reconnect your OEM feed and return hoses.
Robust Electrical Connections
The custom-designed stainless electrical studs are built to handle the high current demands that typical bulkhead connectors struggle with. These connections are not only serviceable but also sealed to resist all standard and exotic fuels. To prevent any accidental short circuits, nonconductive acorn nuts are included, and the high-quality in-tank wiring is insulated with chemically resistant ETFE. You'll also find all the necessary electrical hardware for your fuel pump(s), OEM level sender, and OEM temperature sensor.
Integrated Surge Tank Benefits
Fuel starvation can be a real issue for the FD RX-7 due to its tendency to experience high lateral Gs, causing fuel slosh. Thankfully, Mazda designed the gas tank with a large bolt flange pattern, allowing for various upgrade options. To keep your surge tank functioning properly, a lift pump is essential. This lift pump sits in the rear of the OEM sub tank and is mounted securely with a baffle to ensure it always has fuel to draw from.
How It Works
The 1" check ball allows fuel to enter the surge tank during acceleration while trapping it during deceleration. The lift pump sends low-pressure, high-volume fuel into the surge tank, where a special deflector ensures even distribution, preventing air bubbles and foaming. When demand is low, excess fuel overflows back into the OEM sub tank.
Complete Features List
- Drop-In OEM Replacement
- Supports 1-3 Surge Pumps plus 1 Lift Pump
- 8AN Male Pump Outlet Fitting
- 6" Male Return Inlet Fitting
- Fuel Starvation Protection
- High Current Electrical Hardware
- Compatible with Various Pumps
- Anodized Aluminum Construction
- Gasoline and Ethanol Compliant
- Includes Anodized Aluminum Surge Tank Canister
- Fuel Resistant Submersible PTFE Tubing
- Stainless Steel Mesh Triple Pump Filter
Compatible Fuel Pumps
- Walbro F90000267
- Walbro F90000274
- Walbro F90000285
- Walbro GSS342 255lph
- AEM 50-1200
- Ti Automotive E5LM
Fitment Information
- Mazda FD RX-7 (US) 1993-1995
- Mazda FD RX-7 (JDM) 1992-2002
Important Notes
- The installer must provide their own fuel pumps.
- The kit comes preassembled, but final assembly is performed by the installer.
- All components needed to run up to 4 fuel pumps are included; some parts may not be used depending on your setup.
- Pumps are not included.
