I thought rev hang was to allow a smoother throttle cutoff, so that you don't dump unburned fuel into the ca, supposedly prolonging it's life.

Unburnt fuel gets sorted by PVC System. Plumbed back into the intake track for a second shot at redemption.
How do you suppose unburnt fuel goes into the PCV system? I think your motor may be on the way out if that's the case. Perhaps you mean EGR? Even still this does not loop 100% of the exhaust back into the intake, so this is why they introduce rev hang, to burn the last of it.

Little bit better then module as on I - limited to 60% throttle at max pedal depression. IE throttle plate wont open past 60% even when given the full blow.
How do you know that the power is not being controlled by the wastegate? or valve trickery?


I also don't see how it would help upshift don't you want the rev's to drop when upshifting instead of hanging around?
I would rather my revs drop to the right level rather than hang and sacrifice smoothness