Auto Racing: nos, nitrous jet, solinoids

Question
I have purchased a car with a NOS system already installed my question is how can I tell what the "shot" is ie 125 or 250 etc ?

Answer
First determine what brand the kit is. You can do this by looking at the bottle and the labels on the solinoids. Secondly you can pull out the nitrous jet and write down the number stamped on it. Do the same for the fuel jet. Just don't get the two mixed up. Most solenoids will have a stage name like cheater,powershot etc on the label.
Get me this info plus tell me if its carbureted or F.I.