Originally posted by alex_96GL:
Trevor,
think of what you just wrote. All the air is metered, right? So the PCM knows how much air goes in, right? Where is lean condition coming from. Besides, it's not forced induction -- the amount of air breathed in is determined by the engine vacuum.
There are other reasons not to do things like that. See Blorton's thread for one. The other would be resonant frequency of the long/short runners at low/high RPM.
You could get a lean condition at startup because the computer is not in closed loop operation yet. If you race the engine, you could be in for trouble.
