This may also work.Thanks for sharing the setup!
I thought ACC applied the steering lock on a per car basis and it's always 1:1. I have it on 1180 degrees.
But i had a while ago some problems or call it a weird feel when driving. Since them i do in the Steering panel (Thrustmaster Software here) the right steeringlock for every car and have ingame under controls 0 degree for the steeringlock. This works very well for me.