hmmm, how is using nitrous "rice"? nitrious is the best bang of your buck for quick horsepower. May want to email Dubster99 since he has nitrous. Brand wise, its i'd go with either NOS or Zex, some people like my friend would go with the blue bottle (NOS). On a car thats stock or with some bolt on's, then you could prolly use a 50 shot, and then maybe up to a 70 shot but make sure you get colder spark plugs before using. 1/4 depends on the driver and where your at. My friend gets 14's and he has 30k miles on his car. Nitrous is dangerous and hazardous to your car if you abuse it or dunno WTF your doing. In the words of Dubster99 "Nitrous doesn't kill motors...stupid people running nitrous kill motors"