I did a quick search for this, and couldn't find anything.

Suppose you take your car up to 9000 (or 8000 in an AP2) rpms in first gear, you WOT shift into second. Will the ECU stop the revs at 9200 (or whatever it kicks in on the AP2), or do you risk overring your engine if you're not quick enough?

 

It will stop,and you will feel it.!!

 

It will stop but you WILL NOT feel it due to the fact that you are not engaged when it happens.

When you re-engage the clutch it will either cause the clutch to slip or drop the revs back down.

 

Yeah, the clutch doesn't have to be engaged for the rev-limiter to work. The only time you can over rev the engine is if you down shift into a gear too low for your RPM. The momentum of the car will bring the revs past redline, the revlimiter only cuts off fuel.

 

My crystal ball says that you will fry your clutch very soon.