WI info needed for supercharged 2.2

[Rampage2.2]

I?m considering adding a water injection system to my supercharged 2.2 4 cyl.

I?m wondering what all I would need to get started or even if my engine will benefit from WI for that matter. I don?t know anything about WI other than I?ve read it will help stop detonation and that?s why I?m interested.

Here?s what I?m working on - a 1984 Dodge 2.2 4 cyl. I?m going to be adding a roots type B&M mini supercharger to (66 cu.). I have a 6 PSI pulley but I may get an 8 PSI if all goes well with the install.

I believe I have about 9:1 comp, maybe slightly higher. I?m running a Weber 38 DGES carb that has a #145 main jet currently installed. I plan on retarding my timing a few degrees, going to colder spark plugs and thermostat.

In order to reduce my compression ratio and avoid detonation I?ve considered going to lower compression pistons, but that?s a lot of effort. My supercharger?s manual says to install 2 headgaskets (double them) to drop my compression, but this seems like it may cause reliability problems. So I?d like to look into a WI setup so that I can leave my compression where it is and still avoid detonation.

Having said all that, what WI system if any will work best in my application? Where would the nozzle mount in my case? ? The top on the air cleaner?

This will be on a street driven car - how long will a tank last? Is it best to run just water or is there a mix? What nozzle size would be best to start with?

Any other suggestions?

Thanks.