nitrogen confusion

[PBSouLjAh]

arg!!! this is been so confusing. what does the CI mean and what does the psi mean? i thought ci was da size of da tank, and the psi was how much it holds. isnt it? then how come some 114ci tanks hold less than 68ci tanks??? if da tank was bigger, doesnt it mean it holds more?!? help!

[Dman]

Ci means cubic inches. PSI means pounds per square inch. a 114ci tank would only hold less if it had a lower PSI reading. The CI is how much space is in the tank, and the PSI is the pressure that it is stored in the tank under....