My livesplits doesnt work with Cars xd

How does LiveSplit "not work" with a specific game? That does not make sense. LiveSplit only directly interacts with a game if you tell it to. If you tried that and it didn't work, just delete whatever plugin or whatever you added and run it totally separate from the game.

There are any number of timing softwares. Some listed here -> https://www.speedrun.com/resources