Juice Box 2 – Engine Management ECU

Juice Box 2 is an open-source full engine management ECU designed around the Speeduino project.

Taking the development of the Juice Box to the next level, I designed this fully-fledged Engine Management ECU to convert my Triumph Spitfire to fuel injection. With robustness as the primary aim, Juice Box 2 features a robust design and a fully sealed enclosure to protect it from the harsh automotive environment. See the wiki for more details.

Juice Box 2 Features:

  • Teensy 3.5 microcontroller
  • Compact SMD PCB
  • Fully sealed Deutsch enclosure & connectors
  • Support for 1-4 cylinders, wasted spark, sequential injection
  • Supports 36-1, 60-2 and other trigger wheel types
  • Crank and Cam angle isolated sensor inputs (Hall effect compatible)
  • On-board MAP sensor
  • 5 isolated analogue inputs for O2, inlet air temperature, throttle position, coolant temperature and 1 auxiliary
  • Isolated cooling fan and fuel pump outputs
  • Built-in isolated CAN which also supports OBD II
  • Sensor calibration
  • 16 x 16 ignition table
  • Data logging
  • USB
  • Bluetooth