Radium Engineering Fuel Hanger Plumbing Kit

The Radium Engineering pump hanger is an excellent solution for increasing the fuel flow on modified 2011+ Ford Mustang vehicles. It can be used with 1 or 2 aftermarket pumps, with several pump options available. This drop-in unit replaces the OEM in-tank fuel pump module and is safe for use with alternative fuels such as E85.

The Radium Engineering fuel pump hanger features a carefully designed collector box that keeps fuel trapped around the fuel pump(s).

Inside, the fuel pumps are carefully packaged, along with the associated wiring and plumbing. Fuel is fed out of the top plate through a single threaded port and low-profile adapter fitting. Fuel pressure is regulated inside the Radium hanger and is adjustable. The OEM fuel level sender is transferred onto the Radium hanger, so full functionality is retained. 

The OEM fuel tank access cover and rear seat bench fit without modifications.

PREVENTING FUEL STARVATION
Several mechanisms work together to move fuel into the collector box and keep it as full as possible at all times. This helps the pump(s) have adequate fuel available, even during aggressive driving. The internal pump(s) are supplied with fuel from 3 different sources:

The venturi jet pump fuel scavenged from the passive side of the tank.
The returned fuel from the integrated fuel pressure regulator.
The two 1-way fill valves on the bottom of the collector box.
The one-way fill valves allow fuel in, but not out. While all efforts are made to maximize the starvation protection that a factory tank can offer, this is not a guaranteed fuel starvation solution. For true redundant starvation protection, a fuel surge tank may be necessary.

VENTURI JET PUMP
The OEM venturi jet pump in the return line creates a restriction when using high flowing fuel pumps. Radium Engineering has redesigned the siphon system to eliminate this restriction but still effectively scavenge fuel. This means higher flowing pumps can safely be used without fuel pressure issues. Depending on fuel pressure, the venturi jet pump will consume 15-45 LPH from the feed line. Take this fuel loss into consideration when sizing the fuel pumps. Connection to the crossover venturi system is made easy with the provided SAE quick connections (shown below).

INTEGRATED FPR
The Radium fuel hanger features an integrated adjustable fuel pressure regulator. This means a single feed line out (no return) that dead heads at the fuel rail, just like the OE system. This makes the system a simple plug-n-play install into a Mustang with the OE feed line. The built-in regulator is designed to handle the high flow rates of aftermarket pumps.

1:1 RISING RATE VACUUM REFERENCE
RA-series regulators feature a 360 degree swiveling vacuum reference port that is double O-ring sealed. This is the first in the industry. It permits the installer to quickly point the vacuum fitting in any direction with no tools required.

There are 4 interchangeable 10-32 threaded vacuum port fittings provided to cover all scenarios.

• Barbed Fitting: A black zinc-plated 3/16" (5mm) barb machined from high strength steel that is compatible with the following vacuum hoses: 5/32" (4mm), 3/16" (5mm), and 7/32" (6mm).
• 3AN Male Fitting: A black zinc-plated adapter machined from high strength steel that is compatible with 3AN hose ends.
• Push-To-Connect: A nickel-plated brass fitting with Buna-N O-rings that is compatible with hard plastic 1/4" OD tubing.
• Vacuum Plug: A black oxide stainless steel screw that is used to maintain a constant (non dynamic) fuel pressure. Beginning in the mid 1990s, vehicle manufacturers started transitioning to returnless fuel systems to lower EVAP emissions. To keep temperatures lower, these regulators are mounted inside the tank and do NOT have the ability to be vacuum referenced. This plug would be required in this scenario.

NOTE: When installing the vacuum fitting, it is recommended to use a wicking medium-strength thread locker.

For vehicles with forced induction needing 1:1 rising rate fuel pressure, the built-in regulator features a vacuum reference. If an intake manifold vacuum hose is connected, the built-in FPR will operate at a 1:1 ratio permitting fuel pressure to proportionally increase with manifold (boost) pressure. Conversely, the vacuum port can remain open to atmosphere and pressure will remain constant (like OEM).

For vehicles requiring a return style system, see the optional 20-0806 kit below.
If using the built-in regulator, it should be the ONLY regulator in the fuel system.

PORTS AND FITTINGS

PUMP OUTLET

The outlet on the hanger is female threaded for 8AN ORB (3/4-16 O-ring). Because the S197 uses a different fuel feed line connection than the S550 and S650, two unique low profile SAE quick connect fittings are provided. This can always be changed using an 8AN ORB fitting.

RETURN PORT

The return port is female threaded for 6AN ORB (9/16-18 O-ring). This port is only required to be used if the 20-0806 Fuel Hanger FPR Block-Off (see below) is installed and return line needs to be attached. A plug comes preinstalled in this port. Radium offers a variety of 6AN ORB adapter fittings that can be used in this port (sold separately) for return line connection.

ELECTRICAL
The custom designed anti-rotation stainless electrical studs easily handle the high current demand that compact multi-pin bulkhead connectors lack. These serviceable connections are hermetically sealed and impervious to all standard and exotic fuels. Non conductive anodized aluminum 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 ETFE.

Depending on the specific model trim, the OEM fuel pump wiring is designed for 15-30 amps of current. Depending on the pump installed in the hanger, the fuel pump controller wiring can be reused for a single pump (only). Radium recommends upgrading the vehicle wiring to ensure the fuel pumps are operating at their full potential. Universal fuel pump wiring kits can be found HERE. Select one for each aftermarket pump used.

Compatibility:

• 15-17 Ford Mustang, All (S550)
• 15-16 Shelby GT/GTE/GT-H/GTS (S550)
• 15-20 Shelby GT350 (S550)
• 20-22 Shelby GT500 (S550)

Note: For manual transmission vehicles, the 2-bolt flange clutch line bracket will need to be slightly moved to clear the fuel filter inlet fitting.

INSTALLATION NOTES

• This fuel pump hanger is only sold without pumps pre-installed. Pumps must be installed by the end user/installer. Refer to the installation instructions linked above. Any pumps ordered from Radium will not be pre-installed.
• Since this hanger eliminates the in-tank low micron filter, you must install an external low micron fuel filter. This filter is included in our fuel hanger plumbing kits, or you can use our fuel filter kit with the stock feed line on 2015+ models.

• Drop-In Installation
• Permits 1 or 2 Pumps
• Integrated 1:1 Adjustable FPR
• Fuel Starvation Protection
• High Current Electrical Hardware
• Compatibility with Popular Fuel Pumps
• Anodized Aluminum Construction
• Gasoline, Methanol, Ethanol Compliant
• Fuel Resistant Tubing and Wiring
• Stainless Steel Hardware
• New Anti-rotation Electrical Terminals