Water Injection

[blageo23]

Im thinking about doing a little water injection on my car. I want to do something to it and this is what I came up with. Im going to be making a home made kit. With a 100PSI pump and whatnot. I plan to use washer fluid for the water.
My questions are...
Can it be controlled by my AEM EMS? Like when the boost gets more then 16PSI it will turn on?

Also how much will this actually help my performance?
MODS(when this will be installed):
Built 2.4
20G turbo
650cc injectors
AEM EMS(speed density)
GM boost control solinoid
Greddy FMIC
Tail 38mm WG
Full exhaust
Possibly:
HKS 272 or 280 cams
Magnus Intake Manifold

Thanks,
Mike