Originally Posted by reality
But with ample intercooling and the correct compression ratio, this shouldn't be necessary! But I digress

True enough - i'd never suggest water injection be used to produce power in so much as using it as a det suppresant to achieve huge gains - more of a safety measure.
I've just sorted a setup out for a friend whereby his system is not only set to come in at 1 bar of boost - its set to only come on at 1 bar of boost where ACT's exceed 40 degrees...
The number of people who forget to fill their water injection tanks is scary - hence why the engine should still be safe to run even if the tank runs dry or a pipe blocks etc.