When jumping to the box in single player mode during play and
changing the car, speeding up after leaving the pit lane doesnt work.
Speed will stay at 80km. This seems to happen on all tracks.

Only restarting the game helps.

Did anyone experience the same problem?

nvm!

Quote from thisnameistaken :

The race cars are fitted with pit lane speed limiters. Turn it off by pressing L.

Easy, almost too easy....

for more and detailed infos have a look in the lfs wiki
http://wiki.lfs.4players.de/index.php/Main_Page

Not meaning you Heyen in particular but lately I've seen a lot of people in LFS who seem to have never watched real racing before or not follow it very much, which to me seems weird why they'd buy a game like this.

For example last night someone thought the blue flag meant jump on the brake pedal :s So someone ran right up the rear of him as he jumped on the brakes, on the racing line going down the stright. I've seen people ask "whats a blue flag" and my car is stuck at 50mph etc.

Just seems weird to me that they've bought this game and don't realise why or what things mean :s