But is there any way to switch boost to a lower pressure, if the water injection system shuts down or detects a fault?
Take a look at this :-
http://www.machv.com/turxsdualmec.html
Someone has clearly built a electronically operated two-way gate to switch air-flow between either of the two mbcs. Couldn't we go one stage further and have three of the grainger valves that 'charged' is talking about. One for high boost and one for low boost that we can switch from inside the cockpit and a third one that would open automatically downline if the water injection suffered a fault reducing boost to a pressure that was safe without water injection.
If anyone could get me parts numbers, I'd give it a go but I can't find the electronic switch valve anywhere.
Paul.