Electric cars have to make noise on purpose because otherwise it would be a silent car. And most of these noises are are weird futuristic WEEEE-00000 UFO sounds. Therefore I posit that we should be able to change the noises our electric cars make
EDIT: These suggestions are Top-Notch! Keep em coming!
Under 20 I want choo-choo train noise, 20-50 would be tie fighter noise, over 50 flight of the valkyries.