EFI-R050-049 #1
EFI-R050-049 #1
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Efi Technology R4 Ecu

EFI TECHNOLOGY INC.  |  Part# EFI-R050-049

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The R4 ECU is a fully sequential 4 cylinder engine control system designed for 4 cylinder applications and V twin motorcycles. The enclosure is extruded 6061 aluminium that is environmentally sealed and features an Autosport 55 pin main connector.

The system is configured with 4 high impedance injector drivers and 4 direct coil drive outputs. Ignitor type coils can also be driven directly.

Main communications is via wireless Bluetooth interface or a high speed USB port. External data loggers or dash displays can be interfaced via a current loop or CAN bus output.


The R4 ECU has the following features:-

  • 4 Injector drivers
  • 4 Ignition outputs
  • Wastegate Control
  • 16 Analog inputs (0-5v)
  • 4 Digital inputs
  • 2 Switch inputs
  • Dual lambda (0-5v)
  • 1 PWM outputs
  • Stepper Motor (IAC)
  • Airshift output
  • Auxilliary output


The R4 supports 3D Fuel, Spark and Phase maps with 40 rpm sites and 20 load sites all user programmable. The ECU can store 2 complete maps that can be switched on the fly. The ECU has a beacon input for recording laptimes and track mapping.

The R4 ECU hosts a full line of control strategies as standard for racing applications including: Closed loop lambda, Boost Control, Drive by Wire, Vanos Control, Pit Limiter, Traction Control, Paddle Shift, Engine Protection, Self Diagnostics and more.


Enclosure: Extruded 6061 Aluminum
Construction: CMOS surface mount design
Environmental: Environmentally sealed
Connector: Autosport 55 pin
Dimensions: 4.10" x 4.83" x 1.84"
Weight: 1.0 lbs
Power Supply: 8 to 18 volts transient protected
Power Consumption: 5 watts @ 14 volts
Operating Temp: -40 to +85 deg C continuous
EMI Protection: Exceeds 100V/m >1GHz

Categorized under:
  · Engine Management Systems » Engine Control Units