Quote from Racon :

Some programs use InSim to manage the interface, but also do direct reading/writing of the memory of the running LFS exe as well. That kind of thing is beyond me I'm afraid

Hahaha it scares me too! But I'm still not giving up. Thank you for your answers!

Quote from Racon :

You can't use InSim to set a rev limit, if that's what you mean - the OutGauge part is read-only. You could warn people about high revs, but you can't force them to be cut.

Yes, if other players want to use your app, they will need to enable OutGauge also before the app will receive OutGauge packets.

Thanks for your fast response ! I understand. My goal is to develop something similar to this https://www.youtube.com/watch?v=VXL8AgNZSMo (Minute 1:05)

Quote from Racon :

You can only get that information from the OutGauge packet, so it's only available to local InSims. You need OutGauge configured in LFS's cfg.txt to get LFS to start sending it InSim, too.

Is there a way to "Cut RPM" to the desired amount? If other players download my app in the future, they should set the OutGauge too, right?