After 10 minutes into the mod I noticed you can have infinite rotation and, as I see right now, there isn't torque that decrease increasing the rotational speed so with a water wheel and some cogwheel I started with 10 rpm (a fixed number) and finished with 4000 without losses. I don't know how difficult is to implement torque and I don't expect you to do because one person on the internet said so, what I suggest is to make that, passed a fixed amount of rpm, the cogwheel just drops

Nice this could be my favourite mod to just put in vanilla minecraft, the only thing I think is missing is a frictional heater

Hi giobbo, thanks for your suggestion.
As of right now, there indeed are no limitations on speed and scale of your contraptions.
In the next major update, we're adding a torque mechanic that adds a cost to both speeding up and scaling kinetic systems. If those are not satisfied, all components simply stop turning.
Cheers!~

This should be addressed in the new version that went live just now.
Thanks for the Issue and feel free to re-open if need be.