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Advanced Engine Management
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 (part # 30-2840).
| 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 | 4 |
| Coolant Temperature Sensor Input 0-5V | 4 |
| 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 |
| Finish | Maximum boost limit |
| Physical Dimensions | |
| Length | 120 mm |
| Width | 114 mm |
| Height | 35 mm |
| Finish | Black |
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 the forum. AEM holds no responsibility for any engine damage that results from the misuse of this product!
Advanced Engine Management
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