![]() ![]() Swiveling Inlet Fitting (for 8AN ORB Fuel Rail)Īdding a fuel pressure gauge makes pressure adjustments simple.The Radium Direct Mount Regulator-Rotating Assembly (DMR-RA) is a compact high-performance adjustable EFI fuel pressure regulator. Furthermore, they are compatible with alcohol blends of fuel including methanol, ethanol, and E85. NOTE: When installing the vacuum fitting, it is recommended to use a wicking medium-strength threadlocker.Īll RA-series regulators are suitable with all gasoline types including unleaded, leaded, oxygenated, and pre-mixes. This plug would be required in this scenario. To keep temperatures lower, these regulators are mounted inside the tank and do NOT have the ability to be vacuum referenced. Beginning in the mid 1990s, vehicle manufacturers started transitioning to returnless fuel systems to lower EVAP emissions. ![]() Vacuum Plug: A black oxide stainless steel screw that is used to maintain a constant (non dynamic) fuel pressure. Push-To-Connect: A nickel-plated brass fitting with Buna-N O-rings that is compatible with hard plastic 1/4" OD tubing.Ĥ. 3AN Male Fitting: A black zinc-plated adapter machined from high strength steel that is compatible with 3AN hose ends.ģ. Barbed Fitting: A black zinc-plated 3/16" (5mm) barb machined from high strength steel that is compatible with the following vacuum hoses: 5/32" (4mm), 3/16" (5mm), and 7/32" (6mm).Ģ. There are 4 interchangeable 10-32 threaded vacuum port fittings provided to cover all scenarios.ġ. It permits the installer to quickly point the vacuum fitting in any direction with no tools required. ![]() RA-series regulators feature a 360 degree swiveling vacuum reference port that is double O-ring sealed. The maximum pressure is dependent on the relief valve inside the pump or the maximum current the fuel pump controller allows. 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 laminar flow that enhances stability control. Every detent permits 1psi (+/-0.5psi) of adjustment depending on current fuel pressure. To aid in adjusting pressure, there are incremental detents that provide haptic feedback to the user. With a simple turn of the knob, pressure will be increased or decreased. A jam nut and set screw are no longer required. RA-series regulators feature the first tool-less pressure adjustment. This regulator has two 1/8" NPT side port locations that can be used with a pressure gauge, transducer, temperature probe, etc. Other adapter fittings can be installed in the return port if needed (sold separately). The provided 90 degree 6AN male fuel return fitting can swivel 360 degrees, permitting a multitude of mounting configurations. The bottom return port is threaded for 6AN ORB. If mounting the regulator off-rail, other adapters can be screwed into this regulator port (sold separately HERE). Other swivel adapters are available but sold separately. A swiveling double ended adapter (shown below) is included which allows the regulator to be used in any compatible 8AN ORB fuel rail port, such as those found Radium Engineering fuel rails. The main inlet port on the regulator is female threaded for 6AN ORB. The compact size fits in areas with limited space, without sacrificing performance It can be mounted directly to a compatible fuel rail port using the included 360 degree swiveling adapter, or mounted remotely away from the fuel rail (using 20-0624). This regulator is designed with a unique highly versatile mounting system. Radium Engineering Direct Mount Regulator-Rotating Assembly (DMR-RA) is a compact high performance adjustable EFI fuel pressure regulator. ![]()
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