To make it simple (i swear i'll try to make it clearer):
My guess is you would use the DRM Aero (that's the zakspeed i've been using).
Unpack the car data, open the engine.ini. Spot the maxboost and the damage turbo boost threshold.
View attachment 1513965
You can now apply those values to your script.
ac.setTurboWastegate(0, 1.49, false) is the highest you can go with no engine damage for the AI.
the script would look like this (available for download in the linked file)
View attachment 1513967
If you were playing without damages and wanted the AI to have max power, you could set the wastegate to 1.58.
Is it easier this way?
It's been a quick attempt for me to force the Ai to use full turbo rather than its stupid 80% limit, but the main goal would be to have access to ALL setup values. I've seen numerous players there and there who would enjoy to make setups for the AI to use. It's not on my todo list rn but if anyone is interrested or want to have a test script, hey, let me know.