Cool! Now I can use the Sauber and the R89C more frequently ^^ Thanks for the trick.
Returning to the events in general, are the AI cars customized (transmission, suspension, etc.) in some races? I don't know why it's very difficult in some of them if you use unmodified cars. For example, in New York 200 miles there was a Pagani Zonda C12 that was leading the race, but when I used that car with B-spec at pace 3-4 (I have +8000 points), it wasn't like the Zonda I saw (driven by the AI)... It was way worse. I easily won that with my Saleen S7 but I don't understand why that happened.
It happens also in the Gran Turismo World Championship and the Extreme League races. An AI Nissan R92CP drove very well, without going off the track but when I use a B-spec Nissan R92CP it doesn't do well some turns, even at pace 1.