24w34a Fabric Mod that removes limits for gamerule
maxMinecartSpeed
Download from github releases
Download from modrinth
Install mod on your server/host and set gamerule maxMinecartSpeed to anything you want (in blocks per second).
Install mod on your client (fabric api is not necessary), and you can see your vehicle speed in F3 debug HUD.
In version 1.1.0, I added an API for getting player vehicle speed in blocks per second, you can see it in NoLimitMinecartsApi
I've noticed that speed of minecart kinda limited when there are no passengers.
Feel free to contribute, anything, like anything this project started tonight to just have fun with new update.