Keybind or button on dashboard to activate. Would drain at a set rate determined in the JSON for the engine. In an ideal world, it would boost power for the duration it's active, but also burn out the engine faster.

While this is do-able, and is in the spirit of MTS, it's not something that is high on the MTS priority list. Expect this to linger for a while, especially since the implementation would require somehow equipping vehicles with NOS, which is a fun bit full of fiddling in and of itself.

Alright. Better late than never.

And we will need a bottle filler for the NOS for when it goes empty

So after further thought and witnessing the scene of MTS, I don't see anyone making racing vehicles or users desiring to have super-performance. Nearly all of them want cool vehicles that can go over ground and are fun to drive. While Nitrous would be a fun thing to have, I don't see it being a worthwhile use of my time to code.

I should start making cars again just so you'll add all my performance enhancements.