When using fuel injection you would also have different cam timing events specific to characteristics of that specific engine design.
Probably the most obvious example of these phenomenons would be an individual runner intake manifold with no common plenum, like a Weber 48ids system on an American V8.
With carbs you would literally SEE the fuel getting pushed back and with fuel injection because the fuel is squirted on a timed basis, there is no fuel to push back.
You will see and hear that in the idle AND the sound of the engine under power.
Ironically at some high rpm, maybe 6700 rpm, the Webers and the fuel injection will sound and work almost identically.
I think of it that the carbs are an analog system and the fuel injection a digital one, although granted my intellectual capacity for imagination may in fact be severely limited? (Alright, no agreeing with that here please?)
I had one customer say to me, "you know what your problem is? You're a genius and no one knows WTF you are talking about?"
Just another way of calling me an ass h ole, but I guess he was being very polite for sure? I saw through that and DID NOT discount his bill.
