Originally Posted by alphaxxn
The water trick has been a long known trick in the rotary world, but seeing as how piston motors like to hydrolock alot easier then rotaries, no way would I try that on a piston motor.
He's talking about spraying in a fine mist that will not hydrolock the engine. There are plenty of kits available that do this for you (AquaMist, etc.). The fine mist of water cools the charge and helps prevent detonation. As a side benefit, the mist helps to keep the combustion chambers clean. This is more beneficial to boosted applications, but can be of benefit to n/a applications as well.