You'd only use it for short bursts, such as when drag racing, or perhaps passing a vehicle on a highway. 10 to maybe 15 seconds maximum, include purging the lines. A large bottle, (20lb), could last quite awhile depending on your jetting set up, as to how large a shot you want. A 100 hp shot, held for 10 seconds, would mean using just under a pound.How long does a nitrious bottle last?
how much can you use?
What does it really give you?
I ask, because I really have no idea.