¶ Initial support in v1.0.133
Support for all MegaSquirt units with CAN-broadcast capabilities
¶ Features
Cuts through Digital I/O between CANTCU and the ECU
¶ Connection
CANTCU CAN3 is connected to AEM CAN.
¶ Torque Factor (CANTCU)
To achieve a somewhat realistic torque estimation, the VE (fuel) table needs to be tuned and MS3 Pro correctly configured to show real-world VE values. For this torque estimation we use a Torque Factor. The torque factor is generated from engine running values taken from a single point of running (usually maximum measured torque on a dyno run). The values needed for calculation are listed below.
- Maximum Engine Torque (Nm)
- Manifold Absolute Pressure, MAP (kPa)
- Volumetric Efficiency, VE, Fuel Table (%)
Entering these values in the calculation window will generate a torque factor, which will be used as a baseline for torque calculations in the CANTCU.
¶ Configuration
¶ Activating CAN broadcast in TunerStudio
CANTCU uses the Advanced CAN Realtime Data Broadcasting from MS3 to read in the necessary running/operational values. In CAN-bus/Testmodes -menu, you'll find the CAN Reatime Data Broadcasting settings.
- Enable realtime data broadcasting over CAN → On
- Base message identifier (decimal) → Input a suitable identifier that doesn't collide with anything else on the CAN-bus. Default 1512 (decimal) = 5E8h (Hex)
The following groups need to be enabled:
- 00 (RPM)
- 02 (MAP/CLT)
- 03 (TPS)
- 06 (VE)
- 42 (VSS) ← not needed with simulated speed (on 8HPs)
¶ CANTCU Configuration
In CANTCU, you will need to input the same base message identifier as you've defined in TunerStudio. Example below shows the default 5E8h (Hex) = 1512 (decimal) value for base ID.
¶ Resources
For further information on the CAN-bus in MS3, please refer to the CAN broadcast manual: https://www.msextra.com/doc/pdf/Megasquirt_CAN_Broadcast.pdf