For a street application you are better off with an efficient air-air intercooler (or possibly air-water...but we are already constrained for space on a bike).I had a thread about water/meth injection in another header. Has anyone built a system ? By injecting pre-compressor it seems we could lower intake air temps to increase charge density and increase anti knock potential from the mixture.
Meth or water injection works...but A. Is limited to the amount of meth or water on board of course B. Meth is VERY corrosive. I would only use this on a bike/car that you purge the tank and lines after using.
FYI...water injection has been used in airplanes since I believe WW2. Cool history.