Originally posted by Sandman333:
I don't agree with your assumptions at all. If what you suggest were true, why even have the short runners at all? Wouldn't they hurt performance when they open.
Fair enough, but the engine clearly needs more air than either runner alone can provide. By the time the secondaries do open, the engine is consuming enough air that the injector pulses can be delivered properly.
Btw, did you know that the intake tracts are kept seperate all the way to the valves? So if the IMRC fails, it essentially becomes a 3 valve motor. Small wonder people really notice it when something happens to disable the IMRC's.
Don't get me wrong, I very much agree that proper runner lengths are important at different rpms, I'm just saying perhaps the low rpm problems would be not as major if, for example, the injector could magically be moved to the secondary tract.
Speaking of magic, I'd sure like a star trek type simulator where one could play with this kind of stuff through a voice activated interface. "Computer, analyze pcm and remove throttle hang."
But I digress...
dan
