I don't think it's worth it as you'll loose around 100 watts of power from the lower comp, unless your going to up the boost by .01psi to make up for it. I'm with the water injection way, absolutly spotless and non abrasive. I think you have a lot more risk of getting shit (either abrasive granules from the paper or just carbon crap) down the side of the pistons for no real gain. The time would be better spent cleaning out a throttle body or replacing your interior light globe.