yep , air intake/chamber cooling, can be delivered in a few different ways/locations. prevents detonation ei. fuel instantly exploding before correct piston position(blows holes in pistons and bends/breaks rods).
works with cars and diesels also, we used to use it on marine/generator engines to clean out carbonation buildup from prolonged idling (fishing/no load generator at idle). Used to use an additive by Swepco Chemicals to the water and basically pour it into the eng. Some drawbacks include possible scoring of cylinder if large deposits fail to breakup and get ejected, you can visually scope the cylinder/head prior to making the decision to use to determine if heavy build-up exists.
use too much water ...and bye bye eng., wont blow up but will produce some heavy wear in a very short time on the friction surfaces.
