Throttle Body and Fuel Injectors

[XanderWiFi]

Another info thread as I was carousing things on MPRacing.org. How does the throttle body and fuel injectors correlate and the affect things? The larger throttle body allows more air flow and the fuel injectors allow more fuel and obviously these things equate into more power. But how do they interrelate with the other components of the engine and whatnot?

I remember that someone told me once that you only need larger fuel injectors if you turbo charge your engine. Just looking to hear all the pros and cons and information for installation so it can be an easy search thread in the future.