Sr20 smoke under boost

[Kingofthegutter]

Okay so I have a huge amount of white smoke coming out of the rear of my car under boost I believe it's white and I have no idea what is causing it, I've done a compression test and it is even across the board, I've checked the turbo on the intake side and it has zero shaft play. I've only recently bought this car and am waiting on an exemption to be able to drive it so I haven't taken it for a big drive only around the block so I can't tell if its loosing coolant or oil. It's a 1990 red top sr20det I've got a apexi t28bb turbo haltec sprint 500 ecu, 555cc injectors and supporting bolt ons