HOT RODS PUMP GAS DRAGS - WATER/ ALCOHOL INJECTION??

[TT69CAMARO]

I have been selected to compete in Hot Rods pump gas drags. I have a twin turbo SBC. The rules state that I can use water injection. I haven't done any research on water injection yet, so I thought this would be a good place to get some help!

I would like some help designing a system. I would like to know if injection into the turbos verses into the inlet pipe after the intercooler, would effectively cool the charge more efficiently?
I have alot of work ahead of me before the PGD's and need all the help I can get. Let me know what info you need to design a system and I will get it to you. Everyones help is appreciated.

You can check out my car and others on http://www.forcedpsi.com

Let me know what you think
Thanks