After reading the "Cheap Water Injection" thread I searched and read everything that came up under "water injection" on this forum.
http://www.peachparts.com/shopforum/diesel-discussion/313125-cheap-water-injection.html
It seems to me that there are 3 reasons for WI:
1: water or water/methanol to increase power
2: to lower combustion chamber temperature
3: to clean carbon from the combustion chamber and the piston rings.
In my mind 1 & 2 are about power and the 3rd is about maintenance or repair.
I am looking at WI for it's cleaning effect. I run WVO. I have had no WVO associated problems with my cars (see signature info). But, some of my friends have followed me down this path with less success. I ended up with one of their cars. When I got the pistons out, I had to chisel the rings out their grooves. Another's engine is showing signs of blow by and I want to see if WI will help that engine. A well designed WVO system still has a weak link; and we have found that to be the operator.
Would a WI system design be different for power than for cleaning ?
I have read that the water must be misted at high pressure. (I believe the person used the term "atomized", but we are not really breaking the water down to the atom level with a high pressure sprayer.)
I have read that any stream of water introduced into the intake air stream at any air flow rate above idle will be "mixed" with the air enough to do the job.
Is there a water to air ratio that is too little to do any good (just high humidity) or too much as to cause harm (hydro-lock) ?
Does anyone have any evidence that WI can free up carbon stuck rings.
Like before and after compression tests ?
Before and after crankcase pressure readings ?
Before and after blow by felt out the oil filler ?