I have installed water injection/washer fluid and there is a definite improvement in power when the injection starts about 16 psi, so much so, that I now have a question.

Does any one know and or care to guess how much extra cylinder combustion pressure may be generated above stock or above say level 1 Edge. Maybe too much? Shorten engine life considerably? Head gasket survival? Use in moderation or don't worry, pour in the water and just drive.