When installing, the O-rings require petroleum oil for lubrication. Two -6AN and two -8AN adapter fittings are included to suit most aftermarket fuel systems. The inlet (side) port and outlet (bottom) port feature large 10AN ORB (7/8"-14) threaded ports. Any dynamic fuel pressure created by the rising rate FPR outside of this range is acceptable assuming the vacuum/boost reference line is connected. The base pressure requirement for maximum damping efficiency is 40-120psi (2.8-8.3bar). The integrated 1:1 fuel pulse damper stabilizes fuel pressure created by the fuel pressure regulator, fuel pump, fuel injectors, etc. Furthermore, with the addition of interchangeable return orifices, the regulator is a good match for big to small powered engines.įuel pressure is dialed in using the preload set screw on top. This added precision will resist diaphragm flutter and optimize pressure stability. Two interchangeable orifices are included to match the amount of fuel bypassed for the application. The 1:1 vacuum reference high flow design has been tested to regulate over 1,400 liters per hour (see MORE DETAILS tab). This product is NOT recommended for the low pressure side of mechanical fuel pumps. The FPR-D is compatible with all gasoline and alcohol blends of fuel including E85.Ģ. It is a fully functional high performance pressure regulator with a unique built-in fuel pulse damper, an industry first.ġ.
Both FPD designs are resistant to corrosion from all fuel types including popular alcohol blends such as E85. Radium Engineering’s products are made in the USA.Radium Engineering Fuel Pressure Regulator-Damper (FPR-D) is the ultimate solution for consolidating critical fuel system components into a high-flow package. The FPD-R and FPD-XR are CNC machined from billet aluminum, anodized for a high-quality lasting finish and laser engraved. Both FPD designs are available as either direct mount for installing on a fuel rail, or inline versions for mounting remotely near the fuel rail, and both offer multiple thread size fittings options.
The FPD-XR fuel pulse damper is designed for vehicles with base fuel pressure between 43-78 PSI. The FPD-R fuel pulse damper is a compact version designed to fit into tight spaces and is intended for vehicles with base fuel pressure (the static pressure at start up and idle) between 40-45 PSI. They are ideal for use with all high performance fuel delivery systems.
#Radium fuel damper full
This new FPD design maintains full damping function throughout the range of pressures seen in the fuel system by utilizing a vacuum reference to equalize pressure on both sides of the damper diaphragm. Radium Engineering has designed the first aftermarket vacuum-referenced fuel pulse dampers, FPD-R and FPD-XR, to ensure proper fuel pulse damping at elevated fuel pressures. Radium FPR-R & FPD-XR direct-mount fuel pulse dampers with innovative boost/vacuum reference port. However, most OEM fuel pulse dampers are not ideal for use with modified fuel systems.
Radium has always recognized the importance of fuel pulse dampers and has designed its fuel rails to accept them. This is done with a spring loaded flexible diaphragm inside of the damper housing. High performance vehicles running high fuel pressures, high flow injectors and boosted applications can be especially susceptible to these pulses and the related consequences.Ī fuel pulse damper works by allowing the volume of the fuel system to change slightly, providing the ability to absorb the pulses. This is commonly experienced as mysterious lean spots and stumbling during acceleration or erratic idle that is difficult to correct through EMS tuning. Hydraulic pulses from the fuel pump and the opening and closing of injectors can create undesirable noise and possible interference with injector flow.
#Radium fuel damper install
Both fuel pulse dampers are available in direct mount versions that install on a fuel rail and inline versions for use with dead-end fuel systems or that use fuel rails without a port to receive a fuel pulse damper.
Radium’s FPD-XR fuel pulse damper is designed for vehicles with base fuel pressure between 43-78 PSI and the compact FPD-R fuel pulse damper is designed for vehicles with base fuel pressure between 40-45 PSI. Radium Engineering has released two fuel pulse damper designs for use on high-performance forced induction and naturally aspirated vehicles using large aftermarket injectors.
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