according to calculations, in my neck of the woods, should be able to carve 100 degrees off compressor discharge temps, by evaporating 1.5 lb/minute. That is about 1000 cc/minute.
The shown prototype is a nozzle mount I drew up. It is tooled to fit onto the black phenolic intake tube. I tried to make it as invisible as possible to the airstream, which is calculated at around 250 mph at the neck of the compressor. (Speaking of which, I am not real impressed with the aerodynamic looks of that tube, and a poor 90 degree sharp bend. Suffice to say, it has 10 times the resistance of the stock intake box configuration. It shows how stupid it is to try to find intake improvements, that pre-compressor tube takes the cake.
BTW, if you want to check your compressor blade condition, it takes less than 10 minutes to remove that tube.
I have discussed axial injection with several sources, including an author on boost technology. All agree center mass injection should be harmless to the higher speed tips. In fact, water will probably never reach the tips. But if any water does, it will have accelerated to or near tip speed, near supersonic.
It is believed that MAF will increase 10% or more, with the same commanded boost. We shall see, it is an easy experiment to do. Just pray that I do not have a resonance issue that will break the mount. I am not going to predict any flutter analysis, well because i don't have a clue how to predict it.LOL