Sorry to dig up an old thread, but i would like to send my thanks to @
Nepharius for showing me this idea, i had planned to tap my water resovoir for my WMI but this worked out better!
a few pics:
Installed water/meth tank (from old air resonator) pic shows float switch (for low level sensing) abit of the tank and the drainage tap.
Low meth level flashing red LED indicator:
Tapped and fitted nozel into intercooler (cold side) - mounted as far from throttle body as possible to allow adequate vaporisation before entering combustion chamber.
Engine bay tank snorkel extended and expanded using capped PVC fitting:
On - Off switch for whole kit (Red switch on right)