Universal Fuel Pressure Regulator Damper by Radium

The Fuel Pressure Regulator Damper-Rotating Assembly (FPRD-RA) is the ultimate solution for consolidating critical fuel system components into a high-flow package. It is a fully functional high-performance pressure regulator with a unique built-in fuel pulse damper.

This regulator features two M6x1mm threaded mounting holes. A laser-cut anodized aluminum mounting plate is provided with 4 countersink M6x1mm bolts/nuts.

The inlet (side) and outlet (bottom) feature large 10AN ORB (7/8″-14) threaded ports. Two -6AN and two -8AN male adapter fittings are included to suit most aftermarket fuel systems. When installing ORB fittings, first lubricate the O-rings with petroleum oil.

The 1/8″ NPT auxiliary port can be used for monitoring fuel pressure, temperature, etc. The Radium fuel pressure gauge is commonly used. An included preimpregnated PTFE plug can be used if this port is not needed. When installing a different NPT fitting, PTFE paste is required for proper sealing.

The integrated 1:1 fuel pulse damper stabilizes fuel pressure created by the fuel pump, fuel injectors, regulator, etc. The base pressure requirement for maximum damping efficiency is 40-105psi (2.8-7.2 bar). This range is based on static pressure only. For dynamic fuel pressure outside this range, the vacuum/boost reference line will be required.

RA-series regulators feature the first tool-less pressure adjustment. A jam nut and set screw are no longer required. With a simple turn of the knob, pressure will be increased or decreased.

To aid in adjusting pressure, there are incremental detents that provide haptic feedback to the user. Every detent permits 1psi (+/-0.5psi) of adjustment depending on the current fuel pressure.

With years of track and bench testing data, the RA-series regulators have been refined to optimize pressure management. A newly designed single stainless steel return orifice generates a laminar flow that enhances stability control.

RA-series regulators feature a 360-degree swiveling vacuum reference port that is double O-ring sealed. This is the first in the industry. It permits the installer to quickly point the vacuum fitting in any direction with no tools required.

There are 4 interchangeable 10-32 threaded vacuum port fittings provided to cover all scenarios.

All RA-series regulators are suitable with all gasoline types including unleaded, led, oxygenated, and pre-mixes. Furthermore, they are compatible with alcohol blends of fuel including methanol, ethanol, and E85.

Features

• Compatible with all gasoline and alcohol blends
• Refined to optimize pressure management
• Fully functional high-performance pressure regulator with a unique built-in fuel pulse damper

Applications

• Universal

What’s In The Box?

• 1 – Main Rotating Assembly with Damper
• 1 – Mounting Bracket with M6x1mm Hardware
• 2 – 5mm Barbed Vacuum Fitting
• 2 – Vacuum Plug Fitting, Returnless
• 2 – 1/4″ Push-To-Connect Fitting
• 2 – 3AN Male Vacuum Fitting
• 2 – 6AN male Adapter
• 2 – 8AN male Adapter
• 1 – 1/8″ NPT Port Plug
• 1 – Vacuum Hose Y-adapter
• 1 – Vacuum Hose, 5/32″ ID

Warranty

• Radium’s Standard Limited Warranty