Okay, more than happy to see your idea of how it works
The S61 IGV, which are fuel pressure activated, close at plus 63% ng to brinf the airflow into line with the 3 rows of movable stators which follow the row of IGV's. The primary reason being to allow the smoother transition of air into the compressor at low compressor rotation speeds. As the Ng increases the IGV's close up bringing the IGV's and Stators into line with the 7 stages after the front 3. Without this system the ECU would be damn difficult to start. Any Questions there????
To bring ECU theory to its absolute basics its the Suck, Squeeze, Bang,Blow and if you have a problem with that then, sorry, thats not my problem.
ECU's have a performance problem with density altitude full stop. They are regulated bu mass gas flow NOT by power derived from temperature. Temperature is a product of that required to produce velocity which is then useful.
If any of you doubt it have a look in the exhaust once in a while and play with the free power turbine, its what keeps you in the air.
Have fun
Oh, and just as a bit of tiger poking, if our wonderful engine runs purely on termperature differentials, can someone explain why they surge then??? Wouldn't want that power going back into the cold compressor would we!