What the knob is for
Track grip changes from one pass to the next. Torque management is built to deal with that, and it can be set up with more than one profile for different conditions. A rotary trim knob, such as the 12-position rotary trim module, gives the driver a simple way to make that choice in the lanes without opening a laptop.
What the calibration does
A rotary knob wired to an analog input doesn't tell the ECU "position 5". It sends a voltage. The Knob Calibration converts that voltage into a knob position the ECU can work with. How that position is then used depends on how the rest of your torque management is set up, including the engine RPM target, driveshaft RPM target and correction tables.
What to check
- Load the calibration that matches your knob if one is available.
- Turn the knob through every position with the ECU online and confirm each click reads as the right position, with no jumping between two values.
- Save a copy of the finished calibration with your map.
Haltech's own help text for this Nexus page is still limited, so if your knob won't read cleanly, ask us. For the bigger picture, start with torque management.
