This is AEM's new Universal Standalone ECU designed for 4cyl engines built off of the same frame work as the popular Series2 Plug n Play EMS computers. It is a complete standalone ecu that will completely run the engine, ignition, boost control, fuel control, knock control, idle, nitrous control, and everything else. like the series2 plug n play ecu's AEM sent us a pre-release EMS4 to familiarize ourselves with before they are made public so we can offer experienced tech support to our customers once they hit the market.
4 Saturated Injector Drivers
4 Coil Triggers
8 General Purpose Inputs/Outputs
Mag or Hall cam and crank inputs
8 MB Internal Data Logger
VSS Hall Input
CAN Data Stream
USB Comms Port
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
The computer is Universal, meaning it can run any 4cyl engine including a car engine or a motorcycle engine, or a snow mobile, or a wave runner, jet ski, etc.
Since its universal, you will need to wire it into your harness. You have 3 options here:
a.) There is a "plug n pin" harness that comes with a connector and pins. You can either cut your factory ecu connector off and pin your factory harness wires into this connector. Or you can buy an ecu extension jumper harness that normally goes between your factory harness connector and your factory ecu, and just cut the ecu connector off and pin the jumper harness wires into the AEM connector, allowing you to remove the entire system easily if you want to go back to stock ecu. (this way doesnt molest your stock harness)
b.) There is also a 96" Long Universal Full Wiring Harness complete with Fuse Block and Main Relay if you want to do a complete custom install that will totally replace your factory engine harness. This could be good for you guys who want to do a wire tuck, or maybe your factory harness is just in poor condition and you want to start fresh...
c.) The last option might be the easiest. We will be offering plug and play adapter harnesses that connect your factory wiring harness to the AEM EMS4 allowing you to effortlessly install the ecu into your car in minutes. We will also include base maps for you to start and run the engine well enough to get you to your local tuner.
This ecu is based off the same framework as the popular AEM Series2 Plug n Play ECU's so it uses the same AEM Tuner software (and the newest version is very easy to work with) This ECU controls 4 Ignition Outputs and 4 Fuel Outputs, so it can only run a 4 cylinder, but it also has User Configurable PWM Outputs that can be used for:
Boost Control Knock Control Idle Control Nitrous Control (Also works with Water/Meth Injection)
It has 8 User configurable inputs or outputs
It recognizes both MAG and HALL cam and crank sensors so you wont have any problems using one of these on these cars.
It has 8mb of Internal Logging so you can data log internally without having a laptop hooked up, and review it later on your computer.
All of the harness options come with pre-installed USB Communication ports, and CAN ports for data communication. That means you wont need to use an oldschool serial port laptop to tune the ecu.
The case of the EMS4 is small, lightweight, compact, weatherproof, etc.
IMPORTANT NOTE: ECU NEEDS A HARNESS (NOT INCLUDED)
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)
Coil Triggers 0-5V Falling Edge Fire (Do not connect to coil primary)
Timing Sensor Inputs
VR (Mag) Cam Input
VR (Mag) Crank Input
Hall VSS Input
Hall Crank Input
Hall Cam Input
GPIO - 1.5A Low Side Output / 0-5V Analog Input / Switch Input
GPIO - 1.5A Low Side Output / 0-5V Analog Input / PWM Output
O2 Sensor Input 0-5V Analog
Knock Sensor Input Programmable
Throttle Position Sensor Input 0-5V
Manifold Pressure Sensor Input 0-5V
Coolant Temperature Sensor Input 0-5V
Inlet Air Temperature Sensor Input 0-5V
5 Volt Reference
Communication cables included
Fully enabled editing/logging software included
CAN bus equipped with Programmable Send / Receive
CAN data stream output
Internal data logging
Maximum internal logging rate (per channel)
Data analysis using AEMLog
Functions and Features
User adjustable knock sensor center frequency
Individual cylinder ignition trims
Individual cylinder fuel trims
High/Low speed fuel pump support
All channels/maps/tuning options unlocked
Groundspeed based boost target
Ground speed limiting
Rate of Acceleration Control
Overrun boost enhancement (anti-lag)
Gear change ignition cut (shift-without-lift)
Password protected calibrations
Fuel & Ignition rev limiters
"In cockpit" global fuel trim capability
Gear dependent shift light
Software definable "virtual" switch inputs
EGT Based fuel trims (additional hardware needed)
Maximum boost limit
WARNING! 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.
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 ourforum 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!