Radium Engineering Multi-Port Fuel Pressure Regulator

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. With the Radium Engineering Multi-port Fuel Pressure Regulator, it makes plumbing multiple fuel pumps and fuel rails incredibly straight forward.

The Multi-Port Regulator (MPR) is manufactured in the USA and is the ultimate solution for simple or complex high-flow fuel systems. It’s unique port configuration make it ideal for combining multiple fuel pumps into a single feed line or vice versa. However, it can also be used for single pump applications by simply plugging the unused ports.

The MPR can be plumbed many different ways to suit most any installation; traditional flow-through or dead-end systems. Because of this flexibility, it is also perfect for Radium fuel surge tanks by eliminating the need for an extra “Y” fitting. Download the installation instructions for more information on plumbing scenarios.

The lower 2 opposing return ports are unique in that they flow parallel with the pressure ports eliminating the need for elbow fittings. Either port can be used for the return line, just plug the one not used.

The MPR is the only regulator on the market that can be floor mounted. Alternatively, wall mounting can be accomplished by not using the included mounting bracket and simply mounting using the holes that pass through the body.

Fuel pressure is dialed in using the preload set screw on top.

The 1:1 vacuum reference high flow design has been tested to regulate over 1,400 liters per hour. 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 graph below shows the minimum fuel pressure the regulator can achieve as a function of pump flow rate. This test was performed with the adjustment screw completely backed out, no preload.

For example, if you have two pumps that flow 320LPH (total 640LPH), the approximate minimum pressure the regulator can achieve is about 23.5 psi. Note: if an OEM fuel pressure regulator is used for 640LPH, it will likely not be able to bypass enough fuel.

With the Radium MPR, simply spin the set screw clockwise to achieve higher pressures. Note: Most EFI systems operate at 43.5 psi (3Bar) static fuel pressure.

INCLUDED:

-Multi-port regulator
-Mounting bracket with hardware
-Three interchangeable orifices
-9/16″-18 (-6AN) O-ring port plug (x2)
-3/4″-16 (-8AN) O-ring port plug (x1)
-6AN male adapter fitting (x3)
-8AN male adapter fitting (x1)

ANODIZED COLOR OPTIONS:

Select the anodized color of the MPR’s CNC machined billet top:

Bright Dipped Black

Radium Green

INSTALLATION INSTRUCTIONS