Water injection can really increase power by pushing the
knock limit higher. One can use more optimal ignition advance and considerably
higher boost. Just water can give 15% increase in power, Water+ethanol
25% and Water+methanol 50%! Of course, your turbo and fuel system had better
be adequate too! The amount of water or mixture should be about half of
the fuel delivery at peak power (0.3l/min of water for each 100hp).
