The M84 is a versatile, race-bred ECU that is suitable for a broad range of high performance applications, including engines with up to 8 cylinders. It also suits rotary engines with twin, triple or quad rotors.

This new, entry level ECU is based on the advanced technology in MoTeC's benchmark M800, with a package of features to suit more moderate system requirements. It includes on-board Wideband Lambda plus 512 kB of data logging memory as standard.

Now with Nitrous Injection and 100 Hz max logging rate.

Install it as a stand-alone ECU or as part of a complete motorsport-ready engine management and data acquisition solution. 

Basic Specifications


  • 8 x Injector outputs - high or low ohm

  • 6 x Ignition outputs

  • 8 x Auxiliary outputs - for functions such as boost control, idle speed stepper motor and many more


  • Throttle Position

  • Manifold Pressure
  • Mass Air Flow
  • Fuel Pressure
  • Oil Pressure
  • Exhaust Temperature
  • Gear Position
  • User 1
  • Air Temperature
  • Coolant Temperature
  • User 2
  • 3 x Switched Analogue Temperature
  • 2 x Lambda Inputs (supports Wideband and Narrowband sensors)
  • 4 x Digital Inputs (wheel speed or switch)


  • 1 x CAN

  • 1 x RS232


  • Case size 147 x 105 x 40 mm
  • Weight 500 grams
  • 1 x 34 pin and 1 x 26 pin waterproof connector with gold plated contacts

Useful links

Compare the M84 with other MoTeC ECUs

View MoTeC webinars on the M84 and other ECU topics 



File Size Last Updated
CDS13084 M84 ECU Data Sheet 382 KB Jun 3rd 2011 14:44
M84 ECU WIRING SCHEMATIC 306 KB Nov 16th 2010 18:17


File Size Last Updated
M84 Brochure 350 KB Jun 3rd 2011 14:58


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