AEM Introduces EMS-4 Universal Standalone Engine Management System For Powersports and 4-Cylinder Race Applications!


AEM Introduces EMS-4 Universal Standalone Engine Management System For Powersports and 4-Cylinder Race Applications!


Affordable Standalone Engine Control in Weather- and Shock-Proof Enclosure is Ideal for Sport Bikes, Quads, Sand Rails, Personal Watercraft, Side-by-Sides and 4-Cylinder Race Cars!

March 15, 2011, Hawthorne, CA—Advanced Engine Management (AEM) is proud to introduce its EMS-4 Universal Standalone Programmable Engine Management System (part#30-6905) for modified Powersports and four-cylinder race car applications. The EMS-4 was created using AEM’s powerful Series 2 hardware and includes all of its advanced features without the unneeded ancillary components.


If you have modified your four-cylinder Powersports application beyond the factory ECU’s ability to control engine operation, or have a 4-cylinder race vehicle that does not require some of the advanced hardware features of an AEM Series 2 Plug & Play system, AEM’s EMS-4 provides complete engine control for the most power and reliability.


AEM’s EMS-4 provides complete engine control for small engines with up to 4 cylinders. The unit includes a 36-pin connector that is specifically designed to operate in harsh environments. It is completely sealed and weather/shook proof, allowing it to be mounted anywhere. The EMS-4 works with MAG or HALL crank inputs, can directly drive smart coils or an external igniter such as AEM's 4-Channel Coil Driver (part# 30-2840).

Additional EMS-4 system features include:

  • 4 Saturated Injector Drivers
  • 4 Coil Triggers
  • 8 General Purpose Inputs/Outputs
  • Mag or Hall Cam and Crank Inputs
  • O2 Input
  • Knock Input
  • 8 MB Internal Datalogger
  • VSS Hall Input
  • CAN Data Stream
  • USB Comm Port
  • Compact (4.8" x 4.55" x 1.44"), weather/shock proof enclosure
  • Utilizes AEMTuner Interface Software
  • System is fully enabled and unlocked - Never Pay for Upgrades
  • Context Sensitive Help Eases Tuning Process
  • Maps can be Password Protected by the Tuner to Prevent Unauthorized Usage Sharing


Professional tuners will appreciate the ease of use and security features of Advanced Engine Management’s AEMTuner Software. AEMTuner software is Windows™ compatible (XP, Vista, Windows7), making the task of copying, viewing and manipulating data as simple as a click of the mouse. AEMTuner Software is infinitely adjustable and allows tuners to program virtually any combination of engine control, power adders and auxiliary devices, and accurately delivers proper amounts of fuel and correct ignition timing for any boost level or operating condition.

Additional AEMTuner Software features include:

  • Support Pane gives tuners context sensitive help and uses tuners’ actual calibrations to describe each function
  • Maps can be password protected by the tuner to prevent unauthorized usage or sharing
  • Internal conflict detection notifies tuner if obvious errors exist in assignment of inputs/outputs
  • Compare Calibrations allows tuners to graphically compare tables and maps for easy analysis
  • Workspaces are easily customizable and configurable
  • Colored tables and maps
  • AEM offers a Universal Wiring Harness (part# 30-2905-96) with color coded silk screened wires for ease of installation and an integrated fuse and relay panel. AEM also has sensors and a Plug & Pin Kit (part# 30-2905-0) available.


Please visit or call (310) 484-2322 for more information or to find an Authorized AEM Electronics dealer or Factory-Trained tuner.

AEM’s EMS-4 Universal Programmable Engine Management System is legal in California only for racing vehicles which may never be used upon a highway.

WARNING! Use this system with EXTREME caution! The AEM EMS System allows for total flexibility in engine tuning, however misuse of this product can lead to major engine/vehicle damage. If you are not well versed in engine dynamics and the tuning of management systems or are not PC literate, please do not attempt installation/tuning of this product. For technical assistance, please visit our forum or visit our dealer locator for a Factory Trained tuner near you. AEM holds no responsibility for any engine damage that results from the misuse of this product!


Advanced Engine Management’s performance electronics are Engineered to Outperform. The company designs, manufactures and assembles engine management systems, wideband air/fuel systems, water/methanol injection systems, performance gauges, boost controllers, ignition components, fuel delivery components and adjustable cam gears at its corporate headquarters in Hawthorne, CA.


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