{"product_id":"20-1972","title":"Radium Fuel Hanger Surge Tank - BMW 3 Series E90\/E91\/E92\/E93 (N54\/N55) (Pump Model: Walbro F90000267\/274\/285\/295)","description":"\u003cp\u003eThe Radium Engineering FHST (fuel hanger surge tank) is compatible with all BMW E90\/92\/93 3-series with the N54 or N55 engine.\u003c\/p\u003e\n\n\u003cp\u003eNOTE: This system is compatible with the E90\/92\/93 M3 fuel tank, however the stock M3 fuel pump cannot be controlled with the factory fuel pump controller, advanced system modifications are required to overcome this issue. This is not covered in the installation instructions and is up to the installer to devise a solution. The Fuel Feed Kit is NOT compatible with the M3.\u003c\/p\u003e\n\n\u003cp\u003eOverview\u003c\/p\u003e\n\n\u003cp\u003eThe Radium Fuel Hanger Surge Tank is a revolutionary way to eliminate fuel starvation that can occur during high performance driving, while also providing a way to upgrade the fuel pumps for high-horsepower engine modifications. This system installs inside the BMW fuel tank on the opposite side of the factory fuel pump and can hold one or two high-flow aftermarket fuel pumps. The stock fuel pump is used to pump fuel into the FHST, while the pumps inside the FHST then supply fuel to the engine. The system is E85 compatible and does not require any permanent modifications for installation. Read below to see how the FHST works.\u003c\/p\u003e\n\n\u003cp\u003eBMW Fuel Tank\u003c\/p\u003e\n\n\u003cp\u003eThe OEM saddle bag fuel tank is quite complex. The venturi jet pump is driven by the feed line instead of the return (M3 has 2 venturi jet pumps). The post pump filter and FPR are integrated into the LH side of the tank where the FHST mounts.\u003c\/p\u003e\n\n\n\n\u003cp\u003eRadium FHST\u003c\/p\u003e\n\n\u003cp\u003eWhen these BMWs experience high lateral Gs, they inherently suffer from fuel slosh. The FHST is the best solution in preventing fuel starvation. As described below, the FHST pump(s) are supplied with fuel from 3 different sources: the OEM electric \"lift\" pump, the fuel pressure regulator (FPR), and the integrated 1-way valve.\u003c\/p\u003e\n\n\n\n\u003cp\u003eNote that the BMW fuel pump is still retained but is now repurposed as a \"lift\" pump to fill and maintain volume in the FHST. The lift pump fills the FHST canister through a special orifice in the FHST. This keeps the required pressure for the venturi jet pump(s) to be active and deliver fuel to the lift pump. When a low demand of fuel is present, the FHST canister will overflow back into the LH side of the OEM tank. Fuel will then cycle back into the FHST through a 1-way valve integrated to the bottom of the FHST. Unlike traditional surge tanks that rely heavily on surge tank pump and lift pump flow matching, the FHST uses an extra source that negates this important relationship. No matter what is dynamically changing with the other 2 fuel sources, the high flowing 1-way valve will constantly supply fuel to the FHST canister until the LH side of the gas tank becomes extremely low. At this point, it is up to the lift pump and the FPR to supply the last few ounces of fuel to the FHST.\u003c\/p\u003e\n\n\u003cp\u003eIntegrated Fuel Pressure Regulator\u003c\/p\u003e\n\n\u003cp\u003eLike OEM, a fuel pressure regulator (FPR) is integrated into the unit. Furthermore, if an intake manifold signal is installed, this FPR can operate at a 1:1 ratio permitting fuel pressure to proportionally increase with boost pressure. The returning low pressure fuel from the FPR is sent back into the FST canister keeping it full. A 6-hole diverter evenly disperses fuel inside the canister preventing air bubbles and foaming. Also, 2 fuel return orifices are included for fine-tuning the desired fuel pressure to the fuel pumps' flow rate.\u003c\/p\u003e\n\n\u003cp\u003ePlumbing\u003c\/p\u003e\n\n\u003cp\u003eTo clear the OEM fuel pump cover plate, the 8AN ORB threaded feed port features a preinstalled low profile 8AN male fitting. Sock filters are used on the fuel pump inlets. But because the FHST eliminates the OEM post pump filter, a low micron filter will need to be purchased separately. See the 20-00475-0X fuel feed kit.\u003c\/p\u003e\n\n\u003cp\u003eElectrical\u003c\/p\u003e\n\n\u003cp\u003eThe 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 circuiting. Electrical hardware is included for the fuel pump(s) and OEM level sender. Furthermore, the in-tank wiring is insulated with high quality chemically resistant PTFE.\u003c\/p\u003e\n\n\u003cp\u003eTo run the second fuel pump, another fuse and relay is required. Consider purchasing Radium 17-0031 DIY Wiring Kit HERE.\u003c\/p\u003e\n\n\u003cp\u003ePump Compatibility\u003cbr\u003e\nThis system is suited, but not limited, to the following fuel pumps:\u003c\/p\u003e\n\n\u003cp\u003eWalbro F90000267 E85\u003cbr\u003e\nWalbro F90000274 E85\u003cbr\u003e\nWalbro F90000285 E85\u003cbr\u003e\nWalbro GSS342 255lph\u003cbr\u003e\nAEM 50-1200 E85\u003cbr\u003e\nFeatures\u003c\/p\u003e\n\n\u003cp\u003eDrop-In OEM Replacement\u003cbr\u003e\nPermits 1 or 2 Surge Pumps\u003cbr\u003e\n1:1 Fuel Pressure Adjustments\u003cbr\u003e\nFuel Starvation Protection\u003cbr\u003e\nIntegrated 1-Way Fill Valve\u003cbr\u003e\nHigh Current Electrical Hardware\u003cbr\u003e\nCompatible with Various Pumps\u003cbr\u003e\nAnodized Aluminum Construction\u003cbr\u003e\nGasoline and Ethanol Compliant\u003cbr\u003e\nAnodized Aluminum 8AN Male Outlet Fitting\u003cbr\u003e\nAnodized Aluminum Surge Tank Canister\u003cbr\u003e\nFuel Resistant Tubing and Wiring\u003cbr\u003e\nStainless Steel Hardware\u003cbr\u003e\nRelay(s) and Fuse(s)\u003cbr\u003e\nPump Configuration Selection\u003cbr\u003e\nIf supplying your own pumps, select the option \"Pumps Not Included\" from the menu.\u003cbr\u003e\nNotes:\u003c\/p\u003e\n\n\u003cp\u003eWhen purchasing \"No Pumps Included\", the kit will come partially assembled as shown above.\u003cbr\u003e\nThere will be enough components included with this option to run one or two surge tank fuel pumps.\u003cbr\u003e\nOPTION - Sold Separately\u003cbr\u003e\n20-0475-0X FUEL HANGER FEED, BMW\u003c\/p\u003e\n\n\u003cp\u003eA -8AN PTFE fuel feed line secures to the FHST outlet, as shown below. The fuel line clears the OEM fuel pump cover and all suspension related parts. No cutting or drilling is required. This kit is NOT compatible with the M3. The PTFE hose is routed underneath the vehicle and sent to a Radium Engineering fuel filter secured to the body using OEM hardware.\u003c\/p\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":50988698108221,"sku":"20-1972","price":1017.52,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/7548\/3197\/files\/20-1972_bce8d9c3-de2a-48ed-9cc8-bdafe3b0974e.jpg?v=1763119425","url":"https:\/\/www.modsdirect.com.au\/products\/20-1972","provider":"ModsDirect","version":"1.0","type":"link"}