Radium fuel pulse damper install full#

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. This product is safe for use with all fuel types including alcohol blends such as E85.Radium Engineering Fuel Pressure Regulator-Damper (FPR-D) is the ultimate solution for consolidating critical fuel system components into a high-flow package. 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.