turning up the boost

[Trakx]

What do you think of this?

I have a Corrado G60 TURBO. I'm running 1 Bar boost on a 11.5 AFR. Now i cant raise boost because i get Knock.

I?m thinking on using water injection (JUST WATER). From what i've read i will be able to turn up boost , which will lean my mixture, and
, from what i've read, try to target an AFR of 12.5.

Is this alright? will it work this way?