AEM 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.
AEM EMS-4 Universal Standalone Engine Management System
EMS-4 Universal Standalone Engine Management System
OVERVIEW
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.
WHY YOU WANT THIS
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.
THE HARDWARE
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 cautionUse this system with EXTREME caution
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 the forum. AEM holds no responsibility for any engine damage that results from the misuse of this product!
