Combustion effects from DIY-EFI

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This cannot be referenced enough - the note and more importantly the details in the reference completely changed my understanding of the functioning of water in combustion even after I had been sold on WI for many years.

Bob Harris Note from Eric Fahlgren's not2fast site.

I am sure Bob meant to be to the point and brief but I find this part of Glassman's book in the same section very compelling and should be noted for those who do not have the reference:

... thus one can conclude - correctly - that hydrocarbons inhibit the oxidation of CO.
It is apparent that in any hydrocarbon oxidation process CO is the primary product and forms in substantial amounts. However, substantial experimental evidence indicates the oxidation of CO to CO2 comes late in the reaction scheme. The conversion to CO2 is retarded until all the original fuel and intermediate hydrocarbon fragments have been consumed.

Combustion, Third Edition, Glassman, p. 76

This is why fuel dumping for knock suppression is inefficient and less effective than water mixture injection. And as Bob's original note points out water actually encourages the late stage conversion of CO to CO2.

Just an example of the type of discussions this forum section is meant for - since in my opinion it is one of the least understood effects of water injection - what is actually occuring during combustion.