For those of you running some water injection kit on a supercharged E36 M3, I am wondering what callibration works the best in terms of 1) the PSI boost that engages the pump, and 2) the water nozzle size (e.g. .5MM, .6mm, .7mm)?

I talked to a couple shops and they recommended to do it at about 3PSI and go with either a .5mm or .6mm nozzle.

I appreciate any advice you can provide so I don't spend a lot of time and aggravation tuning the system. Although I understand that the absolute maximum performance can only be obtained by dyno tuning the car.