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Summary of Contents for OMEX OMEM200
- Page 1 OMEM200 Tuning Manual 3v10 200 Series ECU Tuning Manual OMEM200 www.omextechnology.com...
- Page 2 OMEM200 Tuning Manual 3v10...
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Page 3: Table Of Contents
OMEM200 Tuning Manual 3v10 Introduction ......................... 4 What this manual covers ........................4 Notation Used in This Manual ......................4 Software ........................5 Sensor Setup ......................6 Throttle Position Sensor ........................6 MAP Sensor for Engine Load ....................... 6 Coolant Temperature sensor ........................ 7 Air Temperature sensor ........................ - Page 4 OMEM200 Tuning Manual 3v10 Password ........................20...
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Page 5: 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. -
Page 6: Software
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. ... -
Page 7: Sensor Setup
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. -
Page 8: Coolant Temperature Sensor
Coolant Temperature sensor The coolant temperature sensor used by the Omex ECU is a resistive sensor. The raw output of this sensor is calibrated in the ECU to give the information in a more usable form, C. -
Page 9: Air Temperature Sensor
Air Temperature sensor The air temperature sensor used by the Omex ECU is a resistive sensor. The raw output of this sensor is calibrated in the ECU to give the information in a more usable form, C. -
Page 10: Crank Sensor
ECU for many of the popular patterns is already known, some of which are listed below. If you have a different pattern on your engine please contact Omex for advice. It is very easy to make an engine run, but not run properly by incorrectly entering these options and tables. - Page 11 OMEM200 Tuning Manual 3v10 36-1 Tooth Control table: 60-2 Tooth Control table: Rover K-Series (late)
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Page 12: Ignition Timing Alignment
ECU needs to have adjustment for this. The numbers are known for most manufacturers and will be set in the start-up calibration but if they are unknown or if you are using an Omex external 36-1 wheel, you will need to find this value yourself. To find this value you will need a strobe light and an accurate TDC mark on the engine. -
Page 13: Map Axes
OMEM200 Tuning Manual 3v10 Map Axes Engine Speed You can adjust this axis on the ignition map. Typically the RPM axis would have a value towards stall as the first site (450rpm), a site just below the target idle speed, a site on the target idle speed, a site just above the target idle speed, then the rest of the sites evenly spaced to complete the engine speed range, the final site being just above the rev limit. -
Page 14: Rev Limit
OMEM200 Tuning Manual 3v10 Rev Limit Set all of the throttle positions in the table to the same engine speed. An example of a 6000rpm limit is as follows. At this engine speed, a soft cut will be invoked. If the engine speed is exceeded by 50 rpm, then a... -
Page 15: Engine Start Condition
OMEM200 Tuning Manual 3v10 Engine Start Condition The cranking condition is defined by the engine speed options Min RPM and Start Exit RPM. Min RPM is the engine speed at which the engine is considered to start cranking (typically 50 rpm), and... -
Page 16: Idle
OMEM200 Tuning Manual 3v10 Idle The 200 series ECU controls idle using spark scattering. The idle condition is entered by the options Idle on Below RPM, and Idle On Throttle. The engine must be below both of these values to enter idle. The normal warm target idle speed that the ECU attempts to maintain is set by Idle FB Target RPM. - Page 17 OMEM200 Tuning Manual 3v10 With the engine warm set the natural idle (through adjusting air bleed screws or if necessary, the throttle stop, remembering that if the throttle stop is moved, TPS min must be reset) to approximately 150rpm higher than the target idle speed.
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Page 18: Conditions Corrections
OMEM200 Tuning Manual 3v10 Conditions Corrections Air Temperature Ignition can be trimmed based upon air inlet temperature. This is only used for extremes of temperature. This is described by the Air Temp Ign Trim table. Coolant Temperature Ignition can be trimmed based upon coolant temperature. This is only used for extremes of... -
Page 19: Dwell Control
The options Dwell max and Dwell min are the limits of dwell time regardless of calculated values from the tables and coil factor option. These limits are measured in internal units. Contact Omex if you want to change these values. -
Page 20: Dashboard
OMEM200 Tuning Manual 3v10 Dashboard 10.1 Tacho The frequency of pulses for the tacho is set by the option Tacho Teeth. Adjust this number until the tacho reads the correct engine speed. The correct setting for a 4cylinder tacho is 3. - Page 21 ECU and lose the password, Omex CANNOT retrieve the calibration for you. THERE IS NO ‘MASTER’ PASSWORD. The ECU has security features that allow calibrations to be password protected. All Omex calibrations are sent with the password cleared to allow all users access to the ECU. If you are using security, clear the password at the beginning of a mapping session and set at the end.
- Page 22 OMEM200 Tuning Manual 3v10 As the password is unknown click Clear Calibration. A dialog box appears asking if you wish to erase the calibration to allow access. Click Yes. The PC will clear the ECU. ECU | Send new calibration. Select your new start-up calibration.