No vacuum/boost reference hooked to FPD, port left open. The FPD-R cannot be used in this scenario.
Notes: The FPD-XR will work in this example because the base static pressure was set within the requirements. Vacuum/boost reference line must be hooked up to the FPD.
#Radium fuel damper full
Notes: Even though fuel pressure is 63.5psi at full boost, either FPD-R or FPD-XR can work in this example because the base static pressure was set within the requirements. Any dynamic fuel pressure created by a rising-rate FPR outside of this range is acceptable, but only when the base “static” fuel pressure is set within these ranges and the vacuum/boost reference line is connected. IMPORTANT: The ranges above are base static fuel pressures only. The FPD- R (Fuel Pulse Damper- Range) and FPD- XR (Fuel Pulse Damper- Extra Range) both have unique base “static” fuel pressure requirements:įPD-R base pressure requirement = 40 – 45psi (static)įPD-XR base pressure requirement = 43 – 78psi (static)īase pressure is the fuel pressure measured when the fuel pump is running WITHOUT a vacuum line connected to the regulator. The FPD-R (green top) is slightly shorter than the FPD-XR (black top) allowing it to be used in space-contrained applications. What is the difference between FPD-R and FPD-XR? This becomes essential for boosted systems that use a 1:1 rising rate fuel pressure regulator. Furthermore, a fuel pulse damper can help solve erratic lean air/fuel ratio spikes, commonly experienced as “stumbling”, that are difficult to tune out.įor more in-depth information on the function of fuel pulse dampers, read the Radium blog HERE.Īlong with having the flexibilty of using common fittings, Radium Engineering FPD’s use a vacuum/boost reference port which allows for proper fuel pulse damper performance even at elevated fuel pressures. This correction can be measured throughout the RPM range and can often help idle surge, especially with high flow injectors. The FPD’s internal diaphragm will absorb oscillating pulses and stabilize fuel pressure. Actual product may vary.The opening and closing of fuel injectors creates pressure pulses in the fuel rail which can lead to unstable fuel pressure. In order to achieve a safe and consistent rail pressure, a fuel pulse damper (FPD) is often necessary. This is common for K-series swapped vehicles, as shown below. NOTE: Minor grinding may be required depending on the intake manifold used.Ī Radium Engineering direct mount regulator (DMR) can be used if the OEM K-series returnless fuel system will not be reused. The Honda pulse damper and Radium pulse dampers (FPD-XR shown below) can be put on any of the fuel rail ports. If equipped, the OEM fuel pulse damper (shown above) can be reused with the Radium 14-0287 adapter fitting. This correction can be measured throughout the RPM range and can often help an erratic surging idle. The internal diaphragm will absorb oscillation pulses and stabilize fuel pressure. In order to achieve a safe and consistent rail pressure, pulse damper(s) should be used (especially with high flow injectors). The quick connect inlet fitting clears the coolant hose (if equipped).ĭo I need a pulse damper? The opening and closing of the injectors creates pressure pulses in the fuel rail, which can lead to unstable fuel pressure. This kit is a bolt-on plug and play replacement for the OEM fuel rail. RAD/20-0230-00 Honda K-Series Fuel Rail, OEM Configuration Black Anodized Laser Etched Aluminum Fuel Rail This kit only includes the fuel rail and the mounting hardware making it ideal for custom applications. The OEM plastic spacers are reused and Phenolic washers are included to thermally insulate the fuel rail from the aluminum intake manifold. This kit is compatible with all fuel types including popular alcohol mixtures such as E85. Like the OEM fuel rails, the injector bores are 14mm ID so factory injectors are permitted. Shown below is an inline RADIUM Fuel Pressure Gauge mounted on the 8AN ORB fitting. For a list of 8AN ORB adapter fittings, go HERE. All 3 ports are machined with 8AN ORB (3/4-16 female) threads.
They are CNC machined from extruded 6063 aluminum, media blasted, black anodized, and laser etched for a high quality surface finish. The rail features a large 0.69" internal diameter bore to suit even the most fuel hungry engines.
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