[lunarhighway]

i understand you refere to something that would spray water on outside on the radiator?

i suppose one could hook this up to the fan relay, the water stray being a "wet fan" alternatively you could use water injection into the engine.

water injection has little benefits for FE in a NA engine. It was however initially used as "internal cooling" on early gasiline engines, at times when radiators where unreliable. It also prevented predetonation with the low octane fuel, wich was discovered when radiators replaced WI on the low octane fueled engins and they suddenly started nocking...