I searched for some more information and the thing I wrote about M3 in my first post wasnt completely correct. It has six individual throttles, but they are not individualy operated. It seems, their function is not to to get more power from the engine, but to make its reactions quicker. This seems to work, as most of racing engines /except supercharged ones/ have individual throttles.
What I was thinking about, AND NOW TALKING PURELY IN THEORY, is individualy controled throttles.
Originally Posted by kaiku
When the intake valve closes a pressure wave is generated, it travels back from the intake valve to the plenum of the intake manifold where it is reflected and thus travels to the intake valve and so on with a damping factor (spring-mass system).
Exactly, but this applies only for intake with fully opened throttle. In normal conditions, when you drive with lets say 50% throttle opened the pressure wave can not move in the intake freely as it interferes with the partially closed throttle. So the wave moves between intake valve and throttle body. I was just thinking, that with independently controled throttle for each cylinder this movement could be controled so that when intake valve opens the wave just reaches the cylinder and "overfills it" - (As you wrote, with fixed lenght intake this can normaly happen only in narrow range of revs and most manufacturers try to reach this around 3500 rpm)
Simply said, I thought about a system changing position of the throttle between intake valve openings and thus regulating the presure wave in the intake for a wider range of revs.
Though I still think this could be done, the cost for development of such a system would be enormous and the power gain marginal. Increasing engine capacity or a supercharger is much easier way to go.