Smart roadster application

[zerocool]

I have a smart roadster which uses a 700cc turbocharged engine,it boosts to just inder 1.5 bar and I wondered if anyone has fitted a water injection kit to a vehicle like this or has any advise as I am thinking of putting a basic kit on it.
at the moment it has a standard fan cooled intercooler which is quite small and sits in the engine bay so isnt too efficient