I think that if you do not know what injectors do, then you should not be trying to build any engine until you have a little more knowledge about what you are tearing into. I'm not trying to speak down to you, but sheesh, man. Take some baby steps. Go and read up on the basics of a motor. I'll give you a short answer to your q though. An injector is basically a solenoid that's hooked up to a valve. On one side of the valve is the fuel rail which is at a constant fuel pressure. On the other side of the valve is the intake manifold. When your ecu sees a certain Intake manifold pressure from the MAP sensor, it looks up off a digital table(aka fuel map) the pulsewidth of the fuel injector, in other words, how long to open the valve for. The ecu tries to adjust the Air/fuel ratio to be stoiciometric so the engine burns clean, so that will determine how much fuel gets added into the cylinders for cumbustion. RC injectors, like what you are talking about, don't make the fuel flow better, they just give you a higher limit to how much fuel you can add per pulsewidth. In other words, it increases your volumetric flow rate. I've given you plenty to think about, now go look up all the terms that don't make sense to you on howstuffworks.com, since that's what I had to do to learn stuff. You're not gonna get information unless you look for it. We here on the forum don't really have enough time to write a paper on how stuff works, and its a waste of our time when the information's already available somewhere else. Just go look for it.
