My question would be why?
On a turbocharged engine the water cools the intake charge, and a cooler charge means denser air, hence more gas can be used, thus more power. It also keeps the combustion temps down. Many other reasons also.. On a S/C engine, you can inject water before the Super charger (if its a roots/whipple style) to increase sealing between rotors and thus give more boost, and also cool the charge. On a centifugal Chrager, you cna inject afterwards to cool the charge, thus eliminating the need for an aftercooler. Ummmm but on an NA, you really wouldnt get the effects of steam cleaning the intake tract, its not hot enough, even on a TC'ed engineyou only get steam cleaning effects in the chamber and the exhaust port... you might just be better off taking the intake manifold off and cleaning it. And then just use a good quality ram air to help out with the temps...
