![]() ![]() Note: Most EFI systems operate at 43.5 psi (3Bar) static fuel pressure. The Radium Direct Mount Regulator (DMR) is a compact high peformance adjustable EFI fuel pressure regulator designed with a unique highly versatile mounting system. With the Radium MPR, simply spin the set screw clockwise to achieve higher pressures. Note: if an OEM fuel pressure regulator is used for 640LPH, it will likely not be able to bypass enough fuel. This test was performed with the adjustment screw completely backed out, no preload.įor example, if you have two pumps that flow 320LPH (total 640LPH), the approximate minimum pressure the regulator can achieve is about 23.5 psi. The graph below shows the minimum fuel pressure the regulator can achieve as a function of pump flow rate. Furthermore, with the addition of interchangeable return orifices, the MPR can be used in ANY horsepower output EFI system imaginable and is compatible with all gasoline and ethanol blends of fuel. The 1:1 vacuum reference high flow design has been tested to regulate over 1,400 liters per hour. Alternatively, wall mounting can be accomplished by not using the included mounting bracket and simply mounting using the holes that pass through the body.įuel pressure is dialed in using the preload set screw on top. The MPR is the only regulator on the market that can be floor mounted. Either port can be used for the return line, just plug the one not used. Radium MPR Fuel Pressure Regulator The Radium Multi Pump Regulator (MPR) is manufactured in the USA and is the ultimate solution for simple or complex high. The lower 2 opposing return ports are unique in that they flow parallel with the pressure ports eliminating the need for elbow fittings. Download the installation instructions for more information on plumbing scenarios. Because of this flexibility, it is also perfect for Radium fuel surge tanks by eliminating the need for an extra “Y” fitting. Once the fuel pump and engine heated the fuel and engine bay the FPR, both FPRs dropped fuel pressure around 5-10 psi. The kit installs in the same location as the OEM fuel pressure regulator. Interchangeable orifices allow the user to tune the regulator for any fuel pump flow. The Radium Fuel Pressure Regulator offers adjustment from 20psi-up with a 1:1 vacuum reference. ![]() The MPR can be plumbed many different ways to suit most any installation traditional flow-through or dead-end systems. A friend of mine had a problem with an Aeromotive and Fuelab FPR. This is the preferred fuel line routing by Subaru tuners trying to address stumbling issues. However, it can also be used for single pump applications by simply plugging the unused ports. It’s unique port configuration make it ideal for combining multiple fuel pumps into a single feed line or vice versa. The Multi-Port Regulator (MPR) is manufactured in the USA and is the ultimate solution for simple or complex high-flow fuel systems. With the Radium Engineering Multi-port Fuel Pressure Regulator, it makes plumbing multiple fuel pumps and fuel rails incredibly straight forward. NEW FOR 2020 (Available in 8AN ORB only at this time) The Radium Direct Mount Regulator (DMR) is a compact high performance adjustable EFI fuel pressure. With today’s high performance boosted applications fuel delivery is critical, and often times it is difficult to combine multiple pumps into a single feed line. ![]()
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