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 required 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 connector 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 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 Ouput / 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 : 8MB
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 Shit 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 : 120m
Width: 114mm
Height: 35mm
Finish: Black
Warning !
AEM's EMS-4 universal Programmable Engine Management system is legal California only for racing vehicles which may never be used upon a highway.
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 care not PC literate, please do not attempt installation/tuning of this product. For technical assistance, please visit AEM's forum, AEM holds no responsibility for any engine damage that results from the misuse of this product !
