Joined: Feb 2006
Location: Harrisonville, NJ
One way to keep costs of bottle refilling down is to get a nitrous distributors license. The requirements differ from state to state, but it is normally just a fee. Then you can purchase the nitrous in bulk for much cheaper, if you learn how to fill the bottles, which is very simple. As far as the number of uses out of a bottle, My dad ran a Top Sportsman car in which he had a 500+ shot on it. We would get about two passes out of a 25 lbs. bottle. Based off that you should theoretically be able to get 5-6 sprays, with heating inbetween each use, out of a 15 lbs. bottle. That is assuming you are using it for drag racing on 1/4 mile passes, and aren't purging the hell out of it for show.