Click here to download installation instructions (PDF)
Instructions for older 20-041X-XX and 20-051X-XX (these kits have been discontinued)
Watch an independent installation video
Toyota MK4 Supra (JZA80)
Walbro GSS342 255lph
Ti Automotive E5LM
The Radium Engineering fuel pump hanger permits the use of 1, 2, or 3 aftermarket pumps in the stock MK4 Toyota Supra (JZA80) fuel tank. No permanent fuel access cover modification is required.
To simplifying aftermarket -AN hose plumbing, the 10AN ORB threaded feed port (depicted below) features a low profile 8AN male fitting and the 8AN ORB threaded return port features a low profile 6AN male fitting.
Because the fuel pumps utilize integrated check valves, the pump outlets merge into a single 10AN billet collector (20-1511 includes check valves for pump outlets). To reconnect the OEM return and vent hoses, barb fittings are also included.
As shown below, 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. The low profile design keeps all wiring tucked nicely underneath the OEM fuel tank cover using the provided foam insulation.
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. Single pump applications can reuse the OEM fuel pump controller wiring, but it is recommended to upgrade the OEM wiring as these high flow fuel pumps draw additional current requiring larger gauge wire. Fuel pump wiring kits can be purchased HERE. Select qty1 for single pump applications, qty2 for dual pump applications, and qty3 for triple pump applications.
One conclusion with the dated OEM system is poor protection against fuel starvation. The Radium Engineering system incorporates a unique siphon jet pump. Using a venturi-effect, this "mechanical" pump draws fuel from outside the sub-tank and distributes it directly to the pump inlets.
As shown, the sub-tank stays full in all driving conditions.
VENTURI JET PUMP
1. The siphon system has been redesigned to completely eliminate any restriction on the return line but still effectively scavenge fuel. This means higher flowing pumps can be safely used without inducing fuel pressure issues.
2. The new venturi jet pump will consume 15-45 LPH, depending on the current fuel pressure. Take this fuel loss into consideration when sizing the fuel pump(s).
3. Furthermore, there is a new high flow integrated check valve on the merged fuel pump outlet, as shown above. This valve maintains fuel pressure after the engine is shut down.
-Drop-In OEM Replacement
-Permits 1-3 Pumps and 1-2 E5LM Pumps
-8AN Male Pump Outlet
-6AN Male Return Inlet
-Fuel Starvation Protection
-High Current Electrical Hardware
-Compatible with Various Pumps
-Anodized Aluminum Construction
-8AN Male Fitting for Pump Outlet
-6AN Male Fitting for Aftermarket Return
-8.5mm Barb Hose End for OEM Return
-6.5mm Barb Fitting for OEM Vent
-OEM Fuel Sensor Mount
-Venturi Siphon Jet Pump
-Fuel Resistant Submersible Tubing
-Fuel Resistant ETFE Insulated Wiring
-Pump Inlet Filtration
20-1510 FUEL HANGER, MK4, PUMPS NOT INCLUDED, WALBRO GSS342, AEM 50-1200
This fuel pump hanger is designed specifically for the following fuel pumps (among others): Walbro GSS342 and AEM 50-1200.
20-1512 FUEL HANGER, MK4, PUMPS NOT INCLUDED, WALBRO F90000267/274/285
This fuel pump hanger is designed specifically for the following Walbro DCSS 39/50 fuel pump part numbers: F90000267, F90000274, F90000285.
Both 20-1510 and 20-1512 can accomodate 1, 2, or 3 fuel pumps.
As shown above, a bespoke stainless steel triple pump mesh strainer is included for proper fuel pump inlet filtration.
20-1511 FUEL HANGER, MK4, PUMPS NOT INCLUDED, TI AUTOMOTIVE E5LM
This fuel pump hanger is designed specifically for the Ti Automotive E5LM brushless fuel pump.
Because of pump height, the maximum amount of Ti Automotive E5LM brushless pumps that can be physically installed is 2.
A popular fuel pump strategy is to use both brushed and brushless pumps (E5LM) together as depicted below. In this case, the most cost effective solution is to purchase the following:
P/N: 20-1511 (shown above), Qty: 1
P/N: Ti Automotive BKS1001, Qty: 1 or 2 depending on how many brushless pumps will be used.
P/N: 14-0543, Qty: 1 or 2 depending on how many Ti Automotive E5LM brushless pumps will be used.
P/N: Walbro GSS342 or AEM 50-1200, Qty: 1 or 2 depending on how many brushed pumps will be used.
P/N: 14-0143, Qty: 2 or 3 depending on how many Walbro GSS342 pumps. These are NOT needed for AEM 50-1200 pumps.
P/N: 14-0291, Qty: 0 or 1 or 2 depending on how many Walbro GSS342 or AEM 50-1200 pumps will be used.
P/N: 17-0051-00, Qty: 1 or 2 depending on how many Walbro GSS342 or AEM 50-1200 pumps will be used.
OPTIONAL FUEL HANGER PLUMBING KIT
These plumbing kits include everything required to plumb the fuel system between the Radium pump hanger and the fuel rail in the JZA80 Supra. This plumbing kit is designed to work best with a Radium Engineering fuel rail for the 2JZ (20-0215), but may also work with other aftermarket fuel rails. This kit IS NOT COMPATIBLE with the stock 2JZ fuel rail.
The kit includes a pre-made -8AN PTFE feed line that runs from the fuel pump hanger to the fuel filter. Then out of the fuel filter a pre-made -10AN is used to connect to the fuel rail inlet. The fuel lines clear the OEM fuel pump cover and do not require any cutting or drilling to get them past the fuel tank.
For the return line, -6AN E85 compatible rubber fuel hose runs from the pressure regulater bac k to the fuel pump hanger return port. The fuel lines run though these billet aluminum line retainers (green brackets) which are included. The return hose E85 compatible rubber and can be easily modified for installation of an in-line flex fuel sensor.
The included Radium Engineering fuel filter mounts underneath the vehicle using a specifically designed MKIV Supra (JZA80) bolt-on billet mount.
Depending on the kit selected (-03,-05), the fuel filter will be assembled with a choice of different elements. Go HERE for more filter element information. The -05 version is most popular because it meets filtration requirements set forth by Bosch Motorsports and works well with E85.
-Fuel Filter (-03 Stainless, or -05 Microglass)
-Black 8AN and 10AN Male Adapter Fittings (x2)
-Billet Aluminum 60mm Filter 2-Piece Clamp
-Billet Aluminum MKIV Supra Filter Mount
-8AN/10AN PTFE Fuel Feed Line
-6AN Fuel Return Hose (EFI rubber hose)
-Fuel Brake Line Retainers
-Stainless Steel Hardware