Fuel Rail Top Feed Conversion Radium Engineering for Mazda 20B-REW Primary

The Radium Engineering high flow primary fuel rail is for the 20B-REW rotary engine originally found in the 1990-1995 Mazda/Eunos Cosmo. The aluminum fuel rail is anodized black for compatibility with all popular fuel types including E85. Manufactured with a large internal bore, the fuel rail can support all necessary engine power requirements.

Thermal insulating spacers and washers are included with stainless steel hardware to prevent thermal energy from conducting heat into the fuel. The included 14mm lower injector seats were designed specifically to be compatible with or without the OEM diffusers in place. They feature FKM O-rings making them suitable for boosted applications.

COMPATIBILITY

• 1990-1995 Eunos Cosmo 20B-REW

FUEL INJECTOR COMPATIBILITY

Universal fuel injectors with the dimensions shown below are required when installing this fuel rail. The injectors must have this 34mm height with 14mm o-rings.

Many injector manufacturers will have applications with these dimensions. Here are a few examples of applicable injector part number from Injector Dynamics:

• Injector Dynamics ID1050-XDS-34-14-14
• Injector Dynamics ID1300-XDS-34-14-14
• Injector Dynamics ID1700-XDS-34-14-14
• Injector Dynamics ID2600-XDS-34-14-14

Fuel Injectors are NOT included and must be purchased elsewhere.

PORTS AND FITTINGS

The fuel rail ports are tapped for 8AN ORB.

• 8AN ORB Adapter Fittings
• 8AN ORB Direct Mount Regulators
• 8AN ORB Fuel Pulse Dampers
• Fuel Pressure Gauge Adapters

Appropriate fittings must be selected based on the specific application. Ample space around the fuel rail port(s) is necessary for larger accessories such as fuel pressure regulators, fuel pressure gauges, and fuel pulse dampers. To verify clearance, the dimensional drawings on the product pages can be used as a reference guide.

The extra center port allows additional fuel system accessories such as the OEM fuel temperature sensor (using 14-0421), a pressure transducer, Radium fuel pulse damper, etc.