Hey, . Have you tried raising the "Risk" parameter in the AI app? Max it out and see what happens. The higher the "Risk" the closer to the limits of traction the AI will drive.
I wouldn't count on mod vehicles to do anything correctly when working on your own mods. Get your stuff setup for official content and then check with mods. If something doesn't work then troubleshooting the mod is the way to go - it may be possible to fix the mod to align with official content, but certainly no one is going to change the official vehicles to behave like the mod ones. In your last post your "B" illustration doesn't look correct - that should be a road centerline, not a racing line. The AI will chose it's own line based on the road centerline etc.
torsion you are absolutely right on that. May I add to what you said "based on the road centerline" + the road limits (i.e. node radius). Just for completeness. As JL said we resolved all issues through PM. But thank you for putting the above remark in public view.