These two lines (lift pump feed and overflow return) go from the tank (shown above) to a series of bulkhead fittings in the trunk floor. 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.
#Radium fuel system update#
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.
#Radium fuel system full#
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. Stainless steel M6x1.0mm socket head bolts are included for custom mounting.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. The underside of the MPFST is suitable for uneven surfaces commonly found in the trunk of a vehicle. Necessary ring terminals and hardware are included with every surge tank.
The pump power connections are handled with specially designed high-current electrical studs. Filter socks have been replaced with a stainless steel mesh inlet screen. All internal wires are gasoline, ethanol, and methanol compliant. The pumps are mounted using an anodized aluminum bracket. 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. Up to 3 high flowing fuel pumps can be used in the surge tank. Recently redesigned for 2019, the Radium Engineering MPFST is the perfect solution for high power vehicles experiencing fuel starvation during aggressive driving. This "PUMP OUT" 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. This is an excellent fueling solution for vehicles installing large demand power upgrades such as forced induction.īecause all of the compatible pumps utilize an integrated check valve, the MPFST merges all pumps into a single outlet simplifying external plumbing. The surge tank also provides a quick and easy way to upgade any standard fuel system without opening the stock fuel tank. Excess fuel in the surge tank is returned back to the vehicle's main fuel tank. This volume is maintained by the lift pump as well as the fuel returning from the fuel pressure regulator. 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.
Fuel is supplied to the surge tank by a lift pump, which in most cases is the OEM in-tank fuel pump. A fuel surge tank (FST) is designed to prevent fuel starvation to the engine on vehicles with inadequate fuel tank baffling.
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