Then go back to menu M5 / Launch Control and set:
Launch rpm Source = GPC 12 duty
This enables the GPC12 table to set the Launch RPM to between 3000 and 7000 rpm
depending on how the pot is set. If pot is turned fully clockwise then launch is completely
disabled, and when turning the pot down, Launch will be available. Turning the pot further
anticlockwise will lower the launch rpm.
And that's it!
We have now built ourselves a variable launch control with a potentiometer that both
enables/disables launch, and also sets the launch rpm to between 3000 rpm and 7000 rpm.
The exact settings of the launch control parameters must be adapted to the car it is
implemented in.