ScienceofSpeed Link Engine Management System - NSX, 1991-94 (M/T only)


The ScienceofSpeed Link Engine Management System is a full-featured programmable engine control solution for your 1991-94 manual transmission NSX race car. The system replaces the factory power control module with a plug-and-play solution from Link Engine Management that even bolts to the factory mounting location. The system features full programmable engine control (fuel, ignition, VTEC, intake air bypass, traction control, and other features) making it ideal for supercharged, turbocharged, or high-performance naturally aspirated engine control.

This product is designed and intended for Racing Competition Only:
This product is not designed or intended for pollution controlled vehicles. In the United States, the use of this product is regulated by the Environmental Protection Agency under the Clean Air Act. Use of this product must be used in accordance with the Clean Air Act, and any other Federal, State, or Local mandated regulations. The use of this product must only be used on a vehicle in sanctioned competition events and may not be used on public roads, streets, or highways. A Vehicle Compliance Waiver is required for all products marked "Racing Competition Only".  This product replaces the factory ECU, so the factory OBD system is not longer functional.


  • Plug-and-play installation: directly connects to factory engine wire harness.
  • Mounts to factory ECU location: directly mounts to factory mounting location.
  • Full engine control: volumetric efficiency fuel, ignition, intake air bypass (IAB) control, traction control, launch control, and other engine control features. Advanced volumetric efficiency model allows precision closed-loop fuel feedback, especially when an optional fuel pressure sensor is added.
  • Closed loop VTEC control: programmable VTEC settings using the factory pressure switches to verify VTEC function.
  • Traction control: built-in traction control system compatible with factory "traction control" switch or multi-position aftermarket switch and traction control status lamp.
  • Check Engine Light diagnostics: uses the factory CEL lamp to notify the driver when a situation like a sensor fault occurs. Fault codes blink the related error code just as with the factory PCM.
  • Convenient accessory wiring: the included bussing module and accessory connectors allows easy addition of aftermarket sensors or CAN devices.
  • Advanced engine protection: built-in engine protection for knock, lean, or overheating conditions. Add additional protection with the addition of fuel pressure, oil pressure, and oil temperature sensors.
  • Datalogging: high speed on-board datalogging or PC based datalogging.


  • Link G4X Xtreme ECU in rugged aluminum enclosure.
  • Pre-installed ScienceofSpeed wire harness with potted connector and aluminum mounting bracket
  • Accessory connectors
  • USB communication cable
  • Detailed installation & software instructions
  • ScienceofSpeed base calibration map specific to the NSX


ScienceofSpeed Link Engine Management System - NSX, 1991-94 (M/T only)



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