A word of advice , please.@DutchA45s Your tuner should be able to address the clutch slip by increasing the torque clamp request but that is not the only area he should look in.
Please tell him to look into the ignition tables as well. I know this may sound counter intuitive, but the ignition tables is definitely something your tuner can relook into again. There are many cross dependencies on the new Bosch MG1 architecture which many tuners are now discovering and addressing as we speak.
If you can, please place close attention when you do WOT shifts out of comfort mode with the current tune you have, say in Sport+ or Race mode and listen carefully whether you hear any exhaust farts during shifts. If you don't, then you definitely need to ask your tuner to look into the ignition tables.
In the stock ECU calibration, you should hear the exhaust farts clearly during WOT shifts with the ignition cuts happening. But if you mess up the ignition tables, it will introduce all sorts of funny things and in my case clutch slip was one of them.
I too had clutch slips in the early days of my tune while driving on the road and my tuner was able to address it after a couple of rounds of datalogging and adjustments and the car later registered higher torque numbers on the dyno with further calibrations and I have no more slip even till present day.
Just out of curiosity, did you had your CPC remapped as well or just the ECU alone?
During the development of the Tune in your vehicle, was there ever a point in time at which you had the ECU retuned, the clutch disc clamp load increased via the TCU; however nothing done to the CPC?
If so, what was the result?
if not, what did your Tuner warn you could have theoretically occurred?