[Richard L]

I missed this post sorry.

100% saturation is normally achieved in winter and rarely in hot Summer, so for a system that will inject water proportional to the degree of saturation under all boost, summer, winter and differebt load is not going to be easy.

I have no strong view on 100% saturation - metering the water against the fuel flow is pretty accurate.

Water is a very powerful coolant, I am only concern with a system that cannot determine where the 100% saturation point is, over watering might loose power instead of gaining. It is silly to use a good portion of power produced by the engine just to turn the water into steam and to come out of the exhaust pipe.