First few pages in this thread are gold, roll back 2004. Where are these people now?
Anyway I can tell you in a practical testing environment allot of what is discussed as theory or quoted from 80 year old tests does hold true in a real modern high speed internal combustion engine.
WI does indeed take a fair bit (no scrap that ! allot of) knowledge and testing to extract the most from this quite complex science. From personal experience there is much to be said for testing testing then testing some more~! I know the years of work I have done has gained me so much knowledge in this subject and so much of it is hard earned, brain frying stuff, its a stressful job some days, as you are doing things no one else (or very little) can achieve, cause its hard, it takes time, money, analytical ability and a certain level of relevant education to have a hope to repeat what many great engineers found since way back to the 1880's (yes first tests on WI!)......
I love the topic and the science, its my most enjoyable area of research for the above listed reasons and many more
once you get aligned with the great resources Richard has collated here and many other valuable members have linked or posted of their own testing you too can be on the very rare bandwagon of capable people who don't need "power in a can" to look great
Lets face it, anyone can open their wallet or extend a bank loan to pay for race fuel or some other rubbish that eats injectors or fuel system parts, but very few men can actually say that they have fast and reliable and mega powered cars running just normal gasoline/petrol............... that is priceless, just like this forum and the science that is
water injection