#RADIUM FUEL PULSE DAMPER INSTALL INSTALL#
#RADIUM FUEL PULSE DAMPER INSTALL FULL#

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.

THE IMPORTANCE OF USING A FUEL PULSE DAMPER

#RADIUM FUEL PULSE DAMPER INSTALL 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. This product is safe for use with all fuel types including alcohol blends such as E85.Radium Engineering has released two fuel pulse damper designs for use on high-performance forced induction and naturally aspirated vehicles using large aftermarket injectors. Like any fuel system part, the FPD kit should be kept away from excessive heat areas. For best results, the damper should be plumbed as close to the fuel rail(s) as possible. Using the supplied M6 bolts/nuts, the FPD kit can be mounted at any possible angle including upside down.

A fuel pressure gauge is commonly used here or other sensors for pressure or temperature data. These fittings seal to the billet housing using Viton O-rings.Īn 1/8' NPT female port is threaded into the center of the fuel pulse damper. Depending on the size of the fuel feed hose used, there are 3 kits to choose from which include different male adapter fittings (-6AN, -8AN, -10AN). The inline kit features an anodized aluminum housing with a large 0.69' center bore that uses two in-line inlet/outlet ports that are machined with 3/4'-16 UNF threads for 8AN ORB fittings. Base static fuel pressure exceeds the 40-70psi requirement. Also, the vacuum/boost reference line does not need to be installed since maximum fuel pressure does not exceed 120psi.Ĭan I use a FPD-R? No. However, the vacuum/boost reference line must be installed.Ĭan I use a FPD-XR? Yes.

#RADIUM FUEL PULSE DAMPER INSTALL FULL#

Even though fuel pressure is 73.5psi at full boost, the FPD-R will work because the base static pressure was set within the 40-70psi requirement. 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.Ĭan I use a FPD-R? Yes. The ranges above are base static fuel pressures only.

FPD-XR base pressure requirement = 40 - 120psi (static)īase pressure is the fuel pressure measured when the fuel pump is running WITHOUT a vacuum line connected to the regulator.

FPD-R base pressure requirement = 40 - 70psi (static).

The FPD-R (Fuel Pulse Damper-Range) and FPD-XR (Fuel Pulse Damper-Extra Range) both have unique base 'static' fuel pressure requirements: The FPD-R (green top) is slightly shorter than the FPD-XR (black top) allowing it to be used in space-constrained 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. The use of an inline damper is great for applications where there is not an option for direct fuel rail mounting.Īlong with having the flexibility 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.

Many high performance OEM engines use an in-line fuel pulse damper from the factory including the Toyota 2JZ-GTE, Nissan VQ35DE, and Subaru EJ20/EJ25. Furthermore, a fuel pulse damper can help solve erratic lean air/fuel ratio spikes, commonly experienced as 'stumbling', that are difficult to tune out. 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. In order to achieve a safe and consistent rail pressure, a fuel pulse damper (FPD) is often necessary. The opening and closing of fuel injectors creates pressure pulses in the fuel rail which can lead to unstable fuel pressure.

Radium fuel pulse damper install