Tuning Aquamist ??

[canicoll]

Hello, I have a 2011 STi and I am installing an an Aquamist system.
Everything is hooked up but I still have some mods to finish before I can run the car.
I am in Mexico City and I don't have a tuner available that knows the system so I will have to make adjustments myself which brings me to my question. How do I know if I need more or less IDC?? What things do I need to look out for?