school me on turbos please
 

ok i saw this thread on here before and cant seem to find it now. i want to be schooled on turbos i want to know what the numbers mean when some one says 64/71/14 so on and so forth. i am trying to get all the knowledge i can so when i am ready to change my turbo i will have what i am looking for and only do it once i want to make sure i have all supporting mods to go with it i dont want to be "that guy" who has the huge turbo and cant spool the thing and i dont want to be the guy who has more fuel than he know what to do with i want to have the right balance so please school me i am all ears thanks for the classes in advance