ORIGINAL: beau0090_99

I think this subject is going a little beyond what the original intent was for, but I am curious about this subject. Bruce, I understand what you are saying about the throttle being almost fully open (probably around 90%) effective area when the barrel is rotated only roughly 65% on most engines, but what is there to say about the spray bar? I am under the impression that as the throttle rotates, the needle and seat move in relation to each other creating a larger orifice when open. Does 90% of this get accomplished by the time the barrel is rotated 65% or so?
Just curious,
Curtis