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Originally Posted by Revhead
....I understand that water injection(say 50/50 W/M mixtures), would allow leaner fuel mixtures and additional ignition advance. Am I correct? ?
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you are correct in the following sense:
Without W.I. you'd probably need 50% more fuel under full boost and 10degrees of retarded timing (example!)
With water/meth injection you may get away with 30% more fuel and 5 degrees of timing
More power needs more oxygen (provided by the turbo) and more fuel (provided by the fuelling system)
So 30% more power at the wheels will need 30% more oxygen molecules and 30% more fuel --- not much leeway there
You will
not be needing the *extra* fuelling that is typically used for in-cylinder cooling under boost --- that is over and above the fuelling needed to support your extra power. The WI will cater for this missing 'extra' fuel.
(I am just elaborating a bit on Richard's take) :smile: