Radium Dual Fuel Pressure Regulator (DFPR)

SKU: 20-1102

Radium Dual Fuel Pressure Regulator (DFPR) for Direct and Port Injection Systems

The Radium Engineering Dual Fuel Pressure Regulator (DFPR), part number 20-1102, engineered to deliver exact fuel pressure management in custom setups combining direct injection (DI) and port injection (PI). This regulator stands out by enabling separate pressure settings for each fuel path from a single low-pressure fuel pump feed, while actively dampening pressure surges from the PI system to safeguard DI components like the high-pressure fuel pump (HPFP). Drivers and tuners rely on it for consistent delivery across demanding conditions, ensuring reliable power without the inconsistencies found in standard single-regulator configurations.

Key Performance Features

• Independent Pressure Control: Set distinct pressures for DI (FPR1) and PI (FPR2) paths FPR2 always matches or trails FPR1 for balanced operation. Tool-free adjustments use notched dials with 1 psi (±0.5 psi) increments per click, providing tactile feedback and leak-free sealing.
• Pressure Stability: A single stainless steel return orifice promotes smooth laminar flow, reducing fluctuations compared to multi-orifice designs. Minimum operating pressure starts at 18.5 psi (1.3 bar); maximum depends on your pump’s relief valve or controller limits.
• Vacuum Reference Design: Features a 360-degree rotating port with dual O-ring seals to prevent leaks, plus four swappable 10-32 fittings for easy integration:
• 3/16″ (5mm) barbed for vacuum hoses (fits 5/32″–7/32″ sizes).
• -3AN male for braided lines.
• 1/4″ push-to-connect for rigid tubing.
• Solid plug for static setups.
• Broad Fuel Compatibility: Handles all gasoline variants (unleaded, leaded, oxygenated, pre-mixed) and alcohol mixes (E85, methanol, ethanol) without degradation.
• Compact Flush Mounting: Anodized aluminum bracket with M6 hardware allows secure attachment to any flat surface, minimizing space needs in tight engine bays.

This DFPR outperforms basic regulators by isolating systems for precise tuning, eliminating cross-contamination risks, and supporting high-flow demands in boosted or high-horsepower builds making it the clear pick for anyone upgrading hybrid injection setups.

Vehicle Fitment

The 20-1102 is a universal solution for modern vehicles equipped with both direct and port injection systems, including popular platforms from BMW, Volkswagen, Audi, Ford, and Subaru. It installs upstream of the HPFP and PI rails:

• Compatible Applications: Any engine with combined DI and PI fueling (e.g., BMW N55/S55, VW 2.0T EA888, Ford EcoBoost 2.3L/3.5L). Not suited for venturi transfer or surge tank systems.
• Plumbing Guide:
• Pump In: Connect to LPFP outlet after a low-micron filter.
• FPR1 Out: Direct to HPFP inlet.
• FPR2 Out: To PI rail(s) plug unused ends if single-rail.
• Return: Back to tank/cell (add barbed adapters if needed). Verify your setup’s 8AN ORB ports and flat mounting area for seamless integration.

What’s Included in Your Purchase

Every 20-1102 kit arrives complete for immediate installation:

• Main DFPR rotating assembly (anodized aluminum body with stainless internals).
• Mounting bracket and M6x1.0 hardware (flat-head screws for flush fit).
• Vacuum reference fittings (2 each):
• 5mm barbed.
• 1/4″ push-to-connect (nickel-plated brass with Buna-N seals).
• -3AN male.
• Black oxide plugs.
• Output adapters (8AN ORB ports):
• 4x 8AN ORB to -6AN male (for smaller PI lines).
• 4x 8AN ORB to -8AN male (for main feeds/returns).

Additional Specs

• Port Threads: All main ports (in/out/return) are 3/4-16″ (8AN ORB) auxiliary sensor ports on FPR1/FPR2 are 1/8″-27 NPT.
• Part Weight: Not specified by manufacturer.
• Shipping Box Dimensions: Not specified standard packaging ensures safe transit (weight approx. 2-3 lbs based on similar components).