It helps to know all the variables.
Between when it went good and now. What has been changed? Whats been done or fiddled with?
You wound the boost up to 9psi. Does this mean a boost guage was actually reading 9psi or you only intend to boost it to 9psi but it still didnt make boost? You said the turbo is spooling up. Do you say this only because you can hear it, Or the boost guage is telling you this?
Are you running standard computer or aftermarket ecu and ignition?
How well did it run when you were running it in?
Is Cam timming out?
Just pistons , bearings and gaskets wont do this.