location and setting for subaru

[RicouGT]

hi !
i'm french and i've a subaru impreza fitted with 550cc injectors (IDC 85%) at 1.3b boost and 10.8/11 AFR
i'll fit a 2d system but, i've many question..and i don't find the answers easily...so if you could help me it would be very great :wink:
i think put a 0.6mm nozzle, is it good for 10/15% ?
what's the best location for the jet, before intercooler (on the Y just after the turbo by example) or immediatly after the i/c, befre the throttle body ? someone say me that's the best location is where the airflow is the hotter (so before the i/c), what do you think about that ?
i don't understand exactly the work of the "MANIFOLD (WITH 2-10 BAR ADJUSTABLE PRESSURE SWITCH) ", is it use for set the pressure of the injection, or only at idle and when there's no water to avoid pump damage ? if i can set the pressure, the water flow is very different between each nozzle depending this pressure...so is there a table exist to choose the good nozzle according the pressure ?

i thank you to help me..and excuse me for the english very bad.... :sad: