Water-Injection for planned twin-turbo setup?

Nuc370z

Hi all,

So while planning a twin-turbo setup for my 370z, I came across the topic of water-injection into the main intake. However, still being new to my car, I was wondering if anyone has any experience/recommendations for if/how I should go about injecting a water/methanol mixture into my engine to reduce knock. So does anyone have any experience with it? The reason why I am trying to use it is because the "premium" grade gasoline here in Washington is 91-93 and I'm afraid that with a twin-turbo setup it's going to cause engine knock.

Thanks,
Nuc370z