Concerning water consumption:
Does the exhaust smoke white ?
Does the car feel slugish ?

Concerning turbo:
Drag makes a good turbo kit & all but I highly recommend you look elsewhere like a southflorida performance kit or a inlinepro.com kit

Make sure you get a Tial or HKS wastegate, stay away from the cheap wastegates

Hondata or some kind of computer management will be needed, so the fmu you get with the drag kit will almost be useless