PRODUCT DETAILS
Radium Engineering Direct Mount Fuel Pressure Regulator
The Radium Engineering Direct Mount Regulator (DMR) is a compact, high-performance adjustable fuel pressure regulator designed for EFI systems that demand precise fuel control. Its small footprint allows installation in tight engine bays without sacrificing capability, making it ideal for high-flow applications on turbocharged, supercharged, or naturally aspirated engines. The DMR provides consistent and stable fuel pressure, ensuring your engine runs efficiently while delivering maximum performance.
This adjustable fuel pressure regulator mounts directly to an 8AN ORB fuel rail using the included 360-degree swiveling adapter. For fuel rails without 8AN ORB ports, Radium Engineering offers compatible rails or adapters to suit any application. The DMR can also be mounted remotely using the optional off-rail kit. Its bottom 6AN ORB return port features a 360-degree swiveling 90-degree fitting, providing flexibility for a wide range of plumbing configurations.
Featuring tool-less pressure adjustment, the DMR allows simple and precise fuel pressure tuning without the need for jam nuts or set screws. The RA-series 360-degree swiveling vacuum reference port with double O-ring sealing offers the industry’s first fully adjustable vacuum reference without tools. Four interchangeable vacuum fittings accommodate barbed hoses, 3AN hose ends, push-to-connect hard tubing, or vacuum plug configurations, ensuring compatibility with nearly every fuel system setup.
Engineered with a single stainless steel return orifice, the DMR delivers laminar flow for stable fuel pressure across all operating conditions. It is compatible with all types of gasoline, including unleaded, leaded, oxygenated, and pre-mixed fuels, as well as alcohol blends like methanol, ethanol, and E85. Built from precision-machined aluminum, the DMR combines durability, reliability, and style in a compact package suitable for both professional and enthusiast builds.
Key Features
- Direct Mount Design: Fits 8AN ORB fuel rails for tight engine bays
- Tool-Less Pressure Adjustment: Simple knob adjustment with incremental detents
- 360° Swiveling Vacuum Port: Double O-ring sealed for leak-free operation
- High-Flow Stability: Stainless steel return orifice ensures laminar fuel flow
- Flexible Mounting Options: Off-rail or direct mount with included adapters
- Universal Fuel Compatibility: Works with gasoline, ethanol, methanol, and E85
Technical Specifications
- Minimum Pressure: 18.5 psi (1.3 bar)
- Maximum Pressure: Dependent on fuel pump or controller limits
- Inlet Port: Female 6AN ORB with swiveling 8AN adapter
- Return Port: 6AN ORB with 360° swiveling 90-degree fitting
- Side Ports: Two 1/8" NPT for gauges, sensors, or probes
- Material: CNC-machined aluminum
Included in the Box
- Main rotating assembly
- 5mm barbed vacuum fitting
- Vacuum plug fitting (returnless)
- 1/4" push-to-connect vacuum fitting
- 3AN male vacuum fitting
- 6AN male swivel for return line
- Swiveling inlet fitting for 8AN ORB fuel rail
- PTFE impregnated 1/8" NPT plugs (x2)