I was doing some research on water injection systems and came across this page:

http://www.rbracing-rsr.com/waterinjection.html
Some very good info there (although many here likely know as much about water injection), but I thought it well presented and a good read.

They also feature a link on all of their pags titled "Eat Shit." Fairly entertaining read if you've got the time.
http://www.rbracing-rsr.com/eatshit.htm

Do some looking around there and you'll find a variety of calculators, some useful information, and one hell of sweet wastegate. They've been building turbocharged motorcycles for over 20 years now, so I think it's safe to say they're the dog's bollocks for sure.

Thought I'd share.

EDIT:
If you want a real laugh, check out their information on building your own turbo system. A pleasant surprise!

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May the grass grow long on the road to hell for want of use.