Radium Engineering has released two fuel pulse damper designs for use on high-performance forced induction and naturally aspirated vehicles using large aftermarket injectors. 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. 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.
Hydraulic pulses from the fuel pump and the opening and closing of injectors can create undesirable noise and possible interference with injector flow. This is commonly experienced as mysterious lean spots and stumbling during acceleration or erratic idle that is difficult to correct through EMS tuning. High performance vehicles running high fuel pressures, high flow injectors and boosted applications can be especially susceptible to these pulses and the related consequences.
A fuel pulse damper works by allowing the volume of the fuel system to change slightly, providing the ability to absorb the pulses. This is done with a spring loaded flexible diaphragm inside of the damper housing. Radium has always recognized the importance of fuel pulse dampers and has designed its fuel rails to accept them. However, most OEM fuel pulse dampers are not ideal for use with modified fuel systems.
Radium FPR-R & FPD-XR direct-mount fuel pulse dampers with innovative boost/vacuum reference port.
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. 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. They are ideal for use with all high performance fuel delivery systems.
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. The FPD-XR fuel pulse damper is designed for vehicles with base fuel pressure between 43-78 PSI. 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-R and FPD-XR are CNC machined from billet aluminum, anodized for a high-quality lasting finish and laser engraved. 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.
