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Originally Posted by hightower99

the power generated by the water injection (Which I believe would work better if indirectly injected) happens when you inject enough water, so that the temperature is halved when the water turns to dry steam. the volume of the air will fall by half but the water will have expanded by more than 1600 times. So if you inject 1cubic centimeter of water dispersed throughout the cylinder as a fine mist, and the cylinder has a max volume of 500ccs then the water will create over 1600ccs of steam. Now lets say that the water is turned to steam when the piston is down far enough to have 100cc in it. the steam alone would give a pressure of 16 bar but it is with all the other gasses making the increase in pressure slightly more. So in the end you are looking at around 300 extra pounds of force per square inch and on a piston with 10 square inches (a small bore motor) then you are looking at 3000lbs. of extra force! that is more than alittle bit!

Hightower, you're always good for a chuckle.
Water injection does not create power by vaporizing into steam.

Water injection indirectly creates power by removing heat from the combustion chamber via steam vaporization. This lowering of the cylinder temperature raises the detonation threshold which allows the engine tuner to make more power by 1) leaning out the air/fuel mixture 2) advancing the timing 3) raising the boost 4) use lower octane fuel to make the same power as an engine on high-octane fuel without water injection. Raising the boost yields, by far, the biggest power gains which is why water injection is used primarily on forced induction engines.

While your grasp of physics and their theoretical application is exemplary for a 17 year old, you still fail hardcore at many practical apects of engine design and tuning.