Quote Originally Posted by AzKik-R View Post
and this has plus points for the speedy delivery of the fuel to the chamber
there is one problem, being that the valve's are not always open, sooo while the fuel is still spreying everywhere and the valve is closed, where does the atomized fuel go to?
injectors are part of the EFI electronic fuel injection system
they squirt the fuel at the time that the valve is open, they aim the fuel directly into the engine, and then stop spreying the fuel when the valve is closed.
this is how injectors are a cleaner more precise or stoich method of fuel delivery.
stoich is something like 1:14 fuel:air or 14.3, cant remember off hand, any more fuel then this is running it rich, and less fuel is running it lean, lean leads to pre-ignition. stoich is optimal, and very little benefit is found from runnnig too much higher then stoich.
cars like top fuel's dont run a complete combustion cycle, they're very in-efficient, because they just dump fuel into the engine like you wouldn't believe haha
ideally its 14.7:1 air to fuel, but most motors only get around 12:1 from factory, and thats efi motors included. this is probably due to air being mostly nitrogen, whilst fuel needs pure oxygen to combust ideally.
at the speed motors rotate at, the bottlenecking isnt quite noticeable, and it can be quite useful for instantaneous response spikes, but with vacuum physics, the bottlenecking is minimised as it only sucks in the mixtures when the valves are open, much like injectors only spray when the valves are open.

i'll admit carbs arent quite efficient at producing more power from less fuel like efi motors, but carbs can be pretty good power wise. downside with carbs is you cant have both fuel economy and power, its either one or the other.