![]() *Please include shipping/handling charges Have you seen this product at a lower price elsewhere? If so, please give us a chance to match or beat it! We will respond to your request promptly! Contact Radium Engineering for more information on this topic. Clearance issues may be experienced if the FPD-XR is used. For more information on Radium fuel pulse dampers, go HERE. If 20-0119-12 was purchased, either center or outlet port can be used for the FPD-R, as shown below. The optional FPD-R (Fuel Pulse Damper-Range) requires a base static fuel pressure setting of 3 Bar (43.5psi) which matches the OEM Mitsubishi pressure setting. If the OEM configuration fuel rail kit (20-0119-00) was purchased, select the FPD-R for the center port since the outlet port will be used for the OEM fuel pressure regulator. Available with black bezel and housing only. Rugged stainless 1-5/8" OD steel case (1-3/4" OD bezel) with nickel plated male 1/8" NPT fitting. The silicone fluid prevents the needle from vibrating for easy pressure readings. It features an acrylic lens with a silicone filled dial that reads from 0 to 100psi (0 to 6.9 BAR) with +/- 2% accuracy. This high-accuracy fuel pressure gauge is suitable for all fueling applications. NOTE: While the fuel rail is compatible with EVO 4-5-6, the plumbing kit is not. The plumbing kit allows easy hook-up of the fuel rail with factory feed system and factory regulator. This is perfect for installers building a custom fuel system. All fittings must be purchased separately. Unlike most aftermarket EVO 8-9 fuel rails on the market, the Radium fuel rail eliminates the OEM 2 bolt inlet flange which uses a restrictive 0.22" (5.7mm) orifice. The rail is CNC machined from solid 6061 aluminum, bright-dipped anodized and laser etched for a high quality surface finish. It is compatible with all fuel types including popular alcohol mixtures such as E85. Manufactured with a large 0.69" internal bore, the fuel rail can support all necessary engine power requirements. #RADIUM FUEL PULSE DAMPER INSTALL DOWNLOAD#The 8AN ORB (3/4"-16 UNF threads) version seals using a Viton O-ring while the 3/8" NPT variation seals with the tapered pipe threads.Click here to download installation instructions (PDF) The anodized aluminum housing features two selectable threaded male fittings. Vacuum/boost reference line must be hooked up to the FPD. The FPD-R cannot be used in this scenario. #RADIUM FUEL PULSE DAMPER INSTALL FULL#Notes: Even though fuel pressure is 92.5psi at full boost, the FPD-XR will work in this example because the base static pressure was set within the requirements. 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 - 70psi (static)įPD-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. 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. Furthermore, a fuel pulse damper can help solve erratic lean air/fuel ratio spikes, commonly experienced as "stumbling", that are difficult to tune out.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. 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. ![]()
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