I tried doing what Mnementh suggested, which doesn't work, unless both values need to be modified.
https://steamcommunity.com/sharedfiles/filedetails/?id=2999087037

not working

Hi, Mad_Cat!

You are modifying const.DefaultTimeFactor which affects how time is being calculated by the game and this will cause all the issues that you state.

You can modify const.SimGameSpeed.fast and const.SimGameSpeed.fastest, instead. These constants define how fast the simulation goes, without impacting it.

By default, normal is 1, fast is 3 and fastest is 5. So normal speed is 1, fast speed (second button on the HUD) is 3x normal speed and fastest speed (third button) is 5x normal speed.

Do I need a new savegame for this mod ? In my current game I cant forward time faster then default.

schlecht gemachter mod auch wenn es eine gute idee war so hat es bei mir das spiel abstürzen lassen