OMEX OMEM200, 200 Tuning Manual

Tuning Manual

OMEM200

www.omextechnology.com

200 Series ECU

OMEM200 Tuning Manual 3v10

1 Introduction ................................................................................................................. 4

1.1 What this manual covers ...................................................................................................................... 4

1.2 Notation Used in This Manual .............................................................................................................. 4

2 Software ...................................................................................................................... 5

3 Sensor Setup .............................................................................................................. 6

3.1 Throttle Position Sensor ....................................................................................................................... 6

3.2 MAP Sensor for Engine Load ............................................................................................................... 6

3.3 Coolant Temperature sensor ................................................................................................................ 7

3.4 Air Temperature sensor ........................................................................................................................ 8

3.5 Crank Sensor ........................................................................................................................................ 9

3.6 Trigger Wheel ....................................................................................................................................... 9

3.7 Ignition Timing Alignment ................................................................................................................... 11

4 Map Axes ................................................................................................................... 12

4.1 Engine Speed ..................................................................................................................................... 12

4.2 Engine Load ....................................................................................................................................... 12

5 Rev Limit ................................................................................................................... 13

6 Engine Start Condition ............................................................................................. 14

7 Idle ............................................................................................................................. 15

8 Conditions Corrections ............................................................................................ 17

8.1 Air Temperature .................................................................................................................................. 17

8.2 Coolant Temperature .......................................................................................................................... 17

9 Dwell Control............................................................................................................. 18

10 Dashboard ................................................................................................................. 19

10.1 Tacho .................................................................................................................................................. 19

10.2 Shift Light ............................................................................................................................................ 19

OMEM200 Tuning Manual 3v10

11 Password .................................................................................................................. 20

1 Introduction

Thank you for choosing Omex Engine Management. This manual is written to help the user through the specifics of tuning the OMEM200 ECU. It is essential that the user reads all of the Omex manuals before attempting to install the system and before attempting to start the engine. Incorrect use of the Omex system could potentially lead to damage to the engine and personal injury. If you have any doubts about fitting these parts or using the software then please contact Omex for help.

As the system is computer based, technical support is given on the assumption that the user is able to perform simple Windows based operations. The user will also need access to email as Omex will nearly always require a copy of the calibration in the ECU to give support.

Omex may not be held responsible for damage caused through following these instructions, technical, or editorial errors or omissions. If you have any doubts about fitting these parts or using the software then please contact Omex for help.

1.1 What this manual covers

This manual covers the tuning of your Omex 200 ECU. Installation of the ECU and software use are in-part covered, but there are separate manuals available that cover these topics in more depth.

1.2 Notation Used in This Manual

Menu commands are signified in bold type with a pipe symbol | between each level of the menu. For example, File | Open indicates that you should click on the Open option in the File menu.

OMEM200 Tuning Manual 3v10

2 Software

Installing the software

Run SetupMAP4000.x.xx.xx.exe and follow the onscreen instructions.

Connection port

The ECU requires an RS232 serial connection. Desktop PCs and older laptops will have 9pin D shaped ports on them marked COM for this type of communication. If you have this port then this is the best to use for communication with the ECU. If your PC does not have one of these ports then you will need to use an adapter. We suggest using the USB to RS232 adapter from ‘ATEN’ as the software has been specifically designed for this adapter.

Connecting to the ECU

 Ensure that if you are using an adapter, the drivers software from the adapter manufacturer has

been installed.

 Join the data lead between the ECU and the PC  Open MAP4000 from the ‘Start bar’  ECU | Connection Setup and select your port from the list  ECU | Connect  Ignition ON (do not crank the engine)  The ‘Receiving Calibration’ bar will start moving across. When completed, you are connected to

the ECU.

Sending the startup calibration to the ECU

It is not possible to start a new calibration from File | New. Please contact Omex for a suitable start-up calibration.

 Save the start-up calibration from the start-up disk or email to the hard-drive in the location

Documents\OMEX\MAP4000\Calibrations. (note that this folder is only created when MAP4000 is opened for the first time so you must have opened MAP4000 on this PC before)

 Connect to the ECU as described in the above section.  ECU | Send new calibration  Ignition ON (do not crank the engine)  Select your start-up calibration and press ‘open’  When the calibration has been sent to the ECU cycle ignition power OFF / ON

Load Scalar

The multiple of 1 that describes the theoretical 0-5V full scale of the sensor.

Load offset

Most MAP sensors do not have 0V at 0KPa, they have a slight offset. This option describes the offset.

3 Sensor Setup

3.1 Throttle Position Sensor

OMEM200 Tuning Manual 3v10

The parameter TPS raw gives the raw number output of the sensor which is scaled by options TPS min and TPS max to give a throttle that works between 0 and 100%. To calibrate;

 A live reading is shown for TPS raw. TPS raw will be between 0 and 255. The throttle position

sensor can often be rotated by the user. If so, the position should be set so that the sensor never reaches 0 or 255 during its closed throttle to open throttle movement. It is preferable to have the sensor set so that the values do not go close to either extreme. Typically a value of approximately 20 at the idle position will give an acceptable value at WOT (wide open throttle).

 The number for TPS raw at WOT needs to have 1 added to it, then be inputted to the options

box as TPS max (i.e. if TPS Raw is 220, then input 221). The number for TPS raw at the idle position needs inputting to the options box as TPS min.

The Autozero options allow the ECU to automatically re-learn the idle position of the throttle sensor every time the ECU is turned on. 0 disables this feature.

3.2 MAP Sensor for Engine Load

If you are using MAP for engine load sensing then set MAP for Load ON. MAP min and MAP max should be 0 and 255. Do not change these unless instructed to by Omex. MAP Cal is the time over which the ECU averages the MAP sensor input. Measured in internal

units. Typically 12. As standard, the ignition map will show load values of 0-100KPa. This is not KPa, this is simply 0-

100% of the range of the sensor. It is possible to tell the ECU what range the sensor has so that you can read the true KPa value on the maps.

Omex have the values for the sensors sold by Omex. If you want to calibrate your own sensor then either find the voltage output information (total scale, and offset) from the manufacturer, or follow this procedure;

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OMEX OMEM200, 200 Tuning Manual

Specifications and Main Features

Frequently Asked Questions

User Manual