Radium Engineering high performance Motorsport fuel systems, oil catch cans and special fittings MPFST Surge Tank 2,2L - (Ti Automotive E5LM) - without pumps Radium universal fuel surge tank for Walbo E5LM pumps Compatible with various fuels, such as unleaded, leaded, alcohol blends, methanol, ethanol, and E85 What is a fuel surge tank? A fuel surge tank (FST) is designed to prevent fuel starvation to the engine on vehicles with inadequate fuel tank baffling. Fuel is supplied to the surge tank by a lift pump, which in most cases is the OEM in-tank fuel pump. The volume of fuel inside the surge tank acts as a buffer to always keep the FST pump(s) supplied with fuel, even if the lift pump starves momentarily. This volume is maintained by the lift pump as well as the fuel returning from the fuel pressure regulator. Excess fuel in the surge tank is returned back to the vehicle/s main fuel tank. The surge tank also provides a quick and easy way to upgade any standard fuel system without opening the stock fuel tank. This is an excellent fueling solution for vehicles installing large demand power upgrades such as forced induction. Multi-Pump Fuel Surge Tank (MPFST) Recently redesigned for 2024, the Radium Engineering MPFST is the perfect solution for high power vehicles experiencing fuel starvation during aggressive driving. Multiple high flowing fuel pumps can be used in the surge tank. NEW FEATURES In addition to all previous MPFST features, the new MPFST rendition is packed with innovations -Up to 3 Bosch BR540 fuel pumps (DW400) -Up to 2 Ti Automotive E5LM brushless pumps -Up to 3 brushless Bosch pumps (DW440) -Anti-rotation electrical terminals The outlet from the fuel pumps merge into a single outlet simplifying external plumbing. And because the compatible pumps utilize check valves, staging is permitted. NOTE: The brushless Ti Automotive E5LM MPFST includes check valves. The "FUEL PUMP OUTLET" port is 10AN ORB threaded but comes preinstalled with a -8AN male adapter fitting. The "OVERFLOW", "SUPPLY", and "RETURN" ports are all 8AN ORB threaded but come preinstalled with -6AN male adapter fittings. All of these fittings can be swapped out with different sizes (sold separately). When fuel enters the MPFST through the "SUPPLY" and "RETURN" ports, it gets redirected and runs tangential through the canister creating a swirl pot. This helps eliminate unwanted air bubbles and fuel foam that can affect fuel pump and engine performance. The pumps are mounted using an anodized aluminum bracket. All internal wires are gasoline, ethanol, and methanol compliant. The brushless Ti Automotive E5LM MPFST (shown above) utilizes a standard press-in filter sock included commonly with the pump or use (14-0143 Fuel Pump Inlet Filter Sock, 11mm ID, 14-0543 Fuel Pump Inlet Filter Sock, 19mm ID, 14-0843 Fuel Pump Inlet Filter Sock, 19mm ID). All other pumps use the provided stainless steel mesh inlet screen for pre pump filtration shown above. As depicted below, fuel cannot pass between the 3 independent filtration chambers (A, B, C). NOTE: If less than 3 pumps are installed, the empty port does NOT need to blocked off. The pump power connections are handled with specially designed high-current electrical studs. Necessary ring terminals and hardware are included with every surge tank. As shown, the underside of the MPFST is suitable for uneven surfaces commonly found in the trunk of a vehicle. Stainless steel M6x1.0mm socket head bolts are included for custom mounting. There are different versions availlable, depending on your needs and fuel pumps: 20-1440 MPFST, PUMPS NOT INCLUDED, WALBRO GSS342 OR AEM 50-1200 OR DW440 This MPFST comes ready for the end user to install 1, 2, or 3 pumps. PUMP COMPATIBILITY Walbro GSS342 AEM 50-1200 Deatschwerks DW440 NOTES: 1. Some of these fuel pumps are available in our webshop 2. There are many other compatible pumps that use this same physical package. 3. Because of the size, 3 pump can NOT be installed if using the optional fuel level switch. 20-1441 MPFST, PUMPS NOT INCLUDED, BOSCH BR540 OR DW400 This MPFST comes ready for the end user to install 1, 2, or 3 pumps. PUMP COMPATIBILITY Deatschwerks DW440 Bosch BR540 (does not come with a check valve) 20-1442 MPFST, PUMPS NOT INCLUDED, WALBRO F90000267/274/285 This MPFST comes ready for the end user to install 1, 2, or 3 pumps. PUMP COMPATIBILITY Walbro F90000267 Walbro F90000274 Walbro F90000285 Walbro F90000295 (does not come with a check valve) NOTES: Some of these fuel pumps are available in our webshop. 20-0443-00 MPFST, PUMPS NOT INCLUDED, TI AUTOMOTIVE E5LM This MPFST comes ready for the end user to install 1 or 2 pumps. PUMP COMPATIBILITY Ti Automotive E5LM NOTE: These brushless pumps are available HERE. OPTIONS 20-0461 Fuel Level Switch, 1/8 NPT The Multi-Pump Fuel Surge Tank comes standard with a 2AN ORB plug in the "level switch" port. When the plug is unscrewed, this 1/8" NPT fuel level switch can be installed from underneath. When