Head totally mashed - should I run WI or WMI?

[RICE RACING]

I'll try my best to scan one direct article I have on WI written by Jan P Norbye, where he details the Ferrari F1 car (126C from my memory) anyway on a water to petrol ratio of 6% Ferrari saw a drop of EGT of 50deg C (950 C down to 900 C). Its quite a good section on WI history and not information I have seen anywhere else either on line or in other text books, I even have on picture of the TAG 1.5lt F1 engine on an engine dyno with a pretty obvious water injection ring fitted to the the turbo air intake (4 point injection system).

Me personally from my limited testing I would recommend you go with WM50, it makes more power and cools better in my own experience.