In your view Richard what is the safest way to "stop" the engine from self- destructing? Fuel cut? Boost cut? Short but sufficient water surge? Other?
It would seem for the sake of simplicity, that something that directly acts to prevent detonation, but allows for continued transportation. For the majority of readers we are talking about street cars, not just those devoted to racing. Given that tuning with water injection preserves the engine's safe operation without boost, perhaps attacking boost is the simplest link to disrupt.
I do not know how the blow off valve is signalled, but perhaps electronically opening the blow off valve would serve to relieve the threat of detonation, or another similar atomospheric opening.
DDS2 could send voltage to a valve, that remained open until water flow is restored. The difficulty is that under normal operation, water flow is not continous.
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