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AEM 30-6905 EMS-4 Universal Standalone Engine Management System

AEM’s EMS-4 Universal Standalone Programmable Engine Management System is the ideal standalone Engine Management System 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 maximum 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 connetor that is specifically designed to operate in harsh environments. It is completely sealed and weather/shock proof, allowing it to be mounted anywhere. The EMS-4 works with MAG or HALL crank inputs and can directly drive smart coils or an external ignitor such as AEM’s 4-Channel Coil Driver.

Injector/ Coil Outputs

• Injector Outputs (8 ohm minimum, High Impedance Only): 4 Saturated
• Coil Triggers 0-5V Falling Edge Fire (Do not connect to coil primary): 4

Timing Sensor Inputs

• VR (Mag) Cam Input: 1
• VR (Mag) Crank Input: 1
• Hall VSS Input: 1
• Hall Crank Input: 1
• Hall Cam Input: 1

Inputs/Outputs

• GPIO - 1.5A Low Side Output / 0-5V Analog Input / Switch Input: 4
• GPIO - 1.5A Low Side Output / 0-5V Analog Input / PWM Output: 4
• O2 Sensor Input 0-5V Analog: 1
• Knock Sensor Input Programmable: 1
• Throttle Position Sensor Input 0-5V: 1
• Manifold Pressure Sensor Input 0-5V: 1
• Coolant Temperature Sensor Input 0-5V: 1
• Inlet Air Temperature Sensor Input 0-5V: 1
• Sensor Ground: 1
• 5 Volt Reference: 1

Communication

• USB comms: Yes
• Communication cables included: Yes
• Fully enabled editing/logging software included: Yes
• CAN bus equipped with Programmable Send / Receive: Yes
• CAN data stream output: 32 ch

Data Acquisition

• Internal data logging: 8 MB
• Maximum internal logging rate (per channel): 125 Hz
• PC logging: Yes
• Data analysis using AEMLog: Yes

Functions and Features

• User adjustable knock sensor center frequency: Yes
• Individual cylinder ignition trims: Yes
• Individual cylinder fuel trims: Yes
• High/Low speed fuel pump support: Yes
• All channels/maps/tuning options unlocked: Yes
• Boost control: Yes
• Groundspeed based boost target: Yes
• Nitrous injection: Yes
• Staged injection: Yes
• Ground speed limiting: Yes
• Rate of Acceleration Control: Yes
• Overrun boost enhancement (anti-lag): Yes
• Gear change ignition cut (shift-without-lift): Yes
• Password protected calibrations: Yes
• Fuel & Ignition rev limiters: Yes
• "In cockpit" global fuel trim capability: Yes
• Gear dependent shift light: Yes
• Evap/Purge function: Yes
• Software definable "virtual" switch inputs: Yes
• EGT Based fuel trims (additional hardware needed): Yes
• Maximum boost limit: None

Physical Dimensions:

• Length: 120 mm
• Width: 114 mm
• Height: 35 mm
• Finish: Black

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.