It is Friday and here it's almost time to leave work and get some alcohol injected into my mouth
Lots of people are doing it with Supras. I just recently saved a few bookmarks of threads here about this subject that thoroughly covered the details, I'd just give you the links but they're on my other PC at home. But if you look thru thread titles for just a couple weeks in tech section, maybe another section too, just hunt around a little bit I'm sure you'll find it even though "search" rarely works like it should.
After I saw it didn't work, did the same for me as what you said, I again tried the ever elusive "search" and it worked, but my terms must not have been as good as before because it did list a bunch of good ones but not as good as before. I think the best shot is to go to the MkIV Technical section and try "water methanol injection" I also tried "methanol water injection" just to see what's different; you'll probably be able to find more leads in the threads that show up in the search.
edit: I just remembered that since I'm on my home PC now I saved a couple good threads as bookmarks: