temperaments, no. they get out of the way when being lapped and that direction depends on if it's a left or right turn next. Very predictable and the lap times don't seem to change unless it's raining.
it basically ends up being 24hr's of hotlaps, i did the race in the c-9 stock to try and make it close. ended up 9 to 11 laps up by the end. wasn't very exciting.
The bolded part has not been my experience at all. They do
attempt to get out of the way, but I've never noticed any particular tendency for them to take the direction of any corner into account as to how they do it. Maybe I'm just looking at it wrong and they are considering the corner
after the one you attempt to pass them at.
If anything, they seem to tend(probably because it's more annoying) to move to the inside of a corner which is effectively blocking you. If your attempt to go around the outside isn't completed by the time their "parking-time" ends, they will then race you as if it is for position. If you do it right you can get by, but it can be very frustrating if they decide they are tired of letting you through.
If you really want to take the inside to go past a lapper, always be prepared to make a quick adjustment to put two wheels on the grass to complete the maneuver when they try to move to the inside for you at the last instant.
Many people do believe that the AI does lap faster at night, and that you can as well. I personally haven't seen it(or either higher grip or power in my own car), but I was never really looking for it either.
The 24-hours of hotlapping problem is mostly down to the lack of cars to race with and the nature of endurance racing itself(particularly with no damage or failures), so you are alone most of the time. If you are way ahead it's because you chose a car too fast, or you drove better than you did during testing(or didn't do enough testing to find out how fast they are including pit stops) or it rained and you didn't want to struggle with full wets(which in at least some cases they still wouldn't be able to keep up, notably with an AWD car). Not that being well ahead is always a terrible thing, most people can't stand the thought of there being a possibility of losing a 2-hour race, let alone a 24. Myself, I wouldn't have considered it worth my time to run any of them if there wasn't a real chance of losing every single one, so I made sure that there was.