Civic EG

I just turbo ed my d16z6 and everytime i drive around and hit boost i get home and check my fluid and my water is in my over flow box and not in my radiator is it because of my radiator or maybe my thermostat i dont think its my head gasket because there is no white smoke and no oil in my water if anyone could help me with input it would be so thankful.

how is your temperature? You are getting air forced into your cooling system, probably through the head gasket. Did you use ARP studs and torque them properly and then re-torque after running the engine?