Thanks chaps!!!
So now I need misters .... these provide a more complete coverage imo and use less water. the surface only needs to be wet not dripping i think. These make a nice wet circle about 40cm in diameter when sprayed from a distance of approximately 15 cm ...im gonna get another one (so one either side) then a headlight washer motor some tubing and a reduction pipe and i think im sorted
this cost 4 euros (6 dollars) garden seedling mister
ill use just the nozzle ... really a beautiful fine mist enough to wet the entire intercooler with a two second press. if you spray it on your face youre wet but not dripping. very refreshing!