Wouldn't it be cool if cars ran on coal? I'm tired of pumping gas and being yoyo'd by the oil tycoons like a sissy, whenever a man needs to refill they should just go to a quarry and start digging. Every state should have at least one free for all coal mine just like those free for all jade digsites they have in china. Leave your guns at home but pickaxe fights are fair game.
Anyways, if you wanted to speed up just have the guy riding shotgun shovel more rocks in the fire. If you want to stop or slow down it should take at least a whole minute to do so but since your shitty toyota got traded in for an armored pseudo locomotive it won't hurt to crash into anything regardless. Shit sounds kinda cash tbdesu.