Quote:
Originally Posted by CiscoPath
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On a normal factory engine they are a waste. However, if you beef up your engine, increase the compression ratioe etc. etc. water water injection does is cool the combustion chamber, helping to prevent detonation. Also, since you are introducing a bit of water, and it is turned into steam by the heat of combustion, it actually increases the compresion slightly due to the expansion of the steam. BUT... as I said, on a normal engine with no modifications, it is a waste of money.