Nascar Fuel Injection Controller

Document created by Lauren Percy Employee on Oct 26, 2015Last modified by Adrian Puga Candelario on Jul 30, 2019
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tag-400N.jpgThe TAG-400N is a compact, self-contained engine management system and data logger for race engines up to eight cylinders. The unit is complete with integrated ignition and injection drivers and so needs no external units to run an engine.

The TAG-400N exploits Freescale Power architecture technology to provide a powerful and flexible platform for extracting the optimum performance from an engine. Turnkey systems or customer prepared applications are both supported.

In 2013, NASCAR completed more than one million Sprint Cup Series competition miles without a single engine controller failure.




  • One Ethernet
  • Two CAN 2.0B bus (up to 1Mbps)
  • One RS232 (up to 222kbps)
  • Data logging - 256Mbyte


  • Sensor readings are checked for out of range and open circuit
  • The following internal parameters are monitored: Board temperatures, Unit supply voltages.

Sensor Inputs

  • Four HE Speed Sensors (Cam + spares)22 Analog (0 to 5V)
  • Four Pt1000 Temperature Sensors (configurable as analogs in software)
  • Three NTC Temperature Sensors (configurable as analogs in software)
  • Two Wideband Lambda
  • Three switches to GND
  • One lap trigger


  • Eight high-voltage (30V) switched mode, current controlled injector drive stages
  • Eight inductive ignition drive stages
  • Two low side drivers
  • Two high side drivers (can be software configured as one 16kHz H-bridge driver)
  • Five high side drive stages
  • Two Lambda heaters (5A)
  • Two Tacho/Speedo outputs
  • Four 0-5V Gauge Drivers
  • External sensor supplier



Qorivva MPC57xxFreescale's Qorivva MPC57xx family of 32-bit MCUs built on Power Architecture® Technology, is designed for automotive powertrain applications, body control, gateway, chassis and safety and driver information applications.


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