To be honest, the AI is not competitive at all in most of the tracks, even at 100%, so I created a new line to force the AI drivers to take smoother paths through the corners: the process is not so obvious and it took more than a couple of attempts.
I found a good compromise between corner speed, braking and early on the throttle.
It's still a very early attempt with not so amazing results, but at least qualifying now is very challenging (2:04 with Porsche Cup cars - 100% grip) and the race pace is faster.
I know there are already 2 of this mod for Sebring, but none of them seems to work properly: track is Sebring from ac-track-reboot.
if you love what I've done, consider a donation. It means a lot to me.