Hello, I recently got my 1440p144 monitor and just noticed that the in-game frame limiter is 'limited' to 100 FPS. As my panel is a Freesync one I like to limit my framerate at around 140 to avoid going out of the range. For my normal usage I find 50-70 FPS with Freesync to be a dream, but I think it'd be a pretty easy thing to change.
The game should not do that. @Goosah has one of those monitor, maybe he can help? If you are using Windowed/Borderless mode, I'd check that your Windows is set to be running at 144hz.
I think what you mean is just that this: http://media-cdn.beamng.com/uHnAIKuQMcKXQjPP does not go beyond 100?