ScienceofSpeed AEM Infinity Engine Management System - NSX, 1991-94


The ScienceofSpeed AEM Infinity Engine Control Unit (ECU) & Harness System for 1991-94 NSX is a programmable plug-and-play engine management system that allows total standalone control of fuel, ignition, VTEC, along with other engine functions based on the advanced AEM Infinity ECU. The system completely replaces the factory ECU & throttle body assembly.

The AEM Infinity ECU features a latest generation 32 bit 200 MHz processor capable of processing eight or more times faster than comparable engine management systems. This processing power allows for a volumetric efficiency tuning platform with real time closed loop fuel calculations allowing for increased fuel and ignition control allowing engines to produce more power.

The plug-and-play electrical harness designed, tested, and built in house by ScienceofSpeed integrates to the factory engine and cabin harness without cutting required. The complete system can be installed and removed without modification to the vehicle. An easy-wire accessory & VTEC connector allows easy installation of various accessories using factory connectors.

Systems based on the AEM Infinity 506 and Infinity 708 are available. The AEM Infinity 506 features 6 dedicated injector and coil outputs and a single channel on-board wideband sensor controller. The Infinity 708 adds an additional on-board wideband sensor controller, and an increased number of inputs.

Note: factory traction control & cruise control is not supported. The AEM Infinity includes a built-in, easy to configure traction control system. The ScienceofSpeed system is compatible with the factory traction control switch, or may be used with a multi-position switch. The factory "traction control" status lamp is supported.

Note: due to the limited inputs / outputs of the Infinity 506, the Infinity 708 should be considered if the application requires extensive input / output control (FlexFuel, boost control, fuel pressure, etc.) Please click here for a chart detailing available inputs / outputs between the Infinity 506 and Infinity 708.

For a complete comparison of our engine management systems for 1995-05 NSX, please click here.

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.


  • Advanced AEM Infinity ECU with latest generation processor supports volumetric tuning platform with closed loop fuel & ignition control.
  • Professionally constructed plug-and-play harness.
  • Easy-wire accessory & VTEC harness using factory connectors
  • On-board wideband oxygen sensor for precise closed-loop fuel feedback.
  • FlexFuel (E85) tuning.
  • Engine protection based on engine coolant, oil temperature, oil pressure, AFR, etc.
  • Built-in traction control system compatible with factory "traction control" switch or multi-position aftermarket switch and traction control status lamp.
  • Complete electronic throttle body control.
  • Completely replaces factory ECU.


  • AEM Infinity 506 or AEM Infinity 708 ECU
  • professionally constructed plug-and-play electrical harness
  • wideband sensor (one for Infinity 506, two for Infinity 708)
  • wideband sensor electrical harness w/ 1200 deg F heat resistant sleeving
  • included naturally aspirated, supercharged, and turbocharged base calibrations tuned by ScienceofSpeed significantly saving time and expense


  • Infinity: choose between the AEM Infinity 506 or 708. The 708 features additional inputs and outputs. This is particularly useful for 1997-05 turbocharged applications that may not have enough outputs for all required functions.
  • Fuel Pressure Sensor & Fitting kit: highly recommended. Closed loop fuel calculations can be precisely calculated by the AEM Infinity with less reliance on wideband sensors with fuel pressure sensor input. This provides a level of engine safety in case of a fuel pump failure.
  • UEGO wideband controller & sensor: Infinity 506 ECU's include only one wideband O2 input (only one required for single turbocharger systems). For naturally aspirated, supercharged, or twin turbocharged engines, a second external wideband is required. The AEM inline wideband controller is recommended. 
  • MAP sensor: the AEM Infinity is compatible with the factory MAP sensor, capable up to 10 PSI of manifold pressure. For higher boost applications, a higher capacity MAP sensor is recommended: ScienceofSpeed 3 BAR or AEM 3.5 BAR MAP sensor.
  • oil pressure & oil temperature sensors: oil pressure and oil temperature sensors may be added for additional engine safety functions.
  • electronic boost control solenoid: for turbocharged applications, the AEM Infinity can control boost with a wastegate electronic boost control solenoid.
  • FlexFuel (E85) sensor: sensor & installation kit allows for FlexFuel tuning.
  • telemetry display products: view like data from your Infinity with out a laptop. The AEM Infinity is compatible with CAN telemetry display devices like gaugeART CAN Gauge, and AEM CD Dash.
ScienceofSpeed AEM Infinity Engine Management System - NSX, 1991-94



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