There is a return "overflow" line from the surge tank that dumps excess fuel back into the OEM fuel tank. The stock in-tank pump acts as a lift pump to feed the surge tank. We then converted the stock fuel pump drop in module to use AN -6 braided lines and Fragola fittings. We started by unclipping the OEM plastic fuel lines and dropping the tank. We tried to minimize the modifications to this fairly stock drivetrain and fuel system. We kept the stock fuel pump in the stock fuel tank. On his car, which uses the OEM computer and wiring, we installed this Radium Engineering remote surge tank with an internal pump and built in fuel pressure regulator. It runs 315/30/18 Hoosiers at all four corners + has real aero, and would fuel starve under 1/2 tank in long left hand turns. We performed this solution on Jamie Beck's 2013 Mustang GT, which was prepped for NASA ST2 and ST3 competition. We will update this when we do the same to our current 2015 GT S550 Mustang build (which will use an external surge tank). We ran this car in a class where we needed ballast to make weight (we ran NASA TT3 class at 3802 pounds - to be able to get a bonus for higher weight in this power-to-weight class), so it wasn't an issue - unless we forgot to refuel for a session.īoth examples of the "fix" below are from different S197 race cars we built for customers. On our 2011 GT we just ran with the tank full for every Time Trial session, and we ran fairly short sessions. If you are timid (slow), or use really crappy tires, it might never happen to you. This won't happen on "every" left hand turn, and not to every driver. With big Hoosiers and/or aero grip added, it can happen on long turns at even 3/4 tank. We fought this on both our S197 and S550 road race cars, and with good 200TW tires fuel starvation happens at 1/2 tank or less. Depending on the setup, some parts will simply not be used.There are two solutions we have used to "fix" the common fuel starve issue on the S197 Mustang, which occurs on long left hand turns on a road course as grip levels go up.There will be enough components included to use 1 or 2 fuel pumps.Electrical hardware is included for the fuel pump(s) and OEM level sender.Electrical Hardware for Fuel Pumps and OEM Sender.Anodized Aluminum Dual Pump and Fuel Sender Bracket.Anodized Aluminum 6AN Male FPR Inlet Fitting.Anodized Aluminum 8AN Male Pump Outlet Fitting.Anodized Aluminum Venturi Jet Pump with Multiple Orifices. 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. The Radium fuel pump hanger includes a Venturi jet pump with a new integrated pressure-relief valve to minimize back pressure.Īll returning fuel from the pressure regulator and crossover hose exit the jet pump keeping the OEM gas tank baffle full for starvation protection. When using aftermarket high-flow fuel pumps, the OEM jet pump becomes too restrictive creating unwanted back pressure in the regulator return line causing excessive fuel rail pressure. One major issue with the OEM EVO 8-9 fuel pump hanger is the restrictive return port and Venturi jet pump. Furthermore, the high quality in-tank wiring is insulated with chemically resistant PTFE. Nylon acorn nuts are provided to prevent any accidental short circuits. The low profile design keeps all wiring tucked nicely underneath the OEM cover plate. These serviceable connections are properly sealed and impervious to all standard and exotic fuels. The custom designed stainless electrical studs easily handles the high current demand that compact bulkhead connectors lack. However adapter fittings are also included to reuse the OEM fuel lines (if needed). A single 8AN male pump feed port and 6AN male return port simplify aftermarket -AN hose plumbing. The machined assembly drops-in the factory fuel tank replacing the OEM hold-down flange. This system is compatible with the Walbro pumps Ti Automotive F90000267, F90000274 and F90000285 or the AEM 50-1220. The 20-0345-00 hanger for Walbro/Ti is pictured.This hanger can house 1 or 2 fuel pumps in the factory Evo 8/9 fuel tank.Fits 1 or 2 Fuel Pumps (Sold Separately):
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