Well, It DID get worse with more boost, and once it had idled for a while it muffled out
now it doesnt make the noise at all, and i found the problem. I pulled all the piping off and found that a small aluminium bolt had somehow (i donno how) had gone into the turbo, there was aluminium everywhere and the bolt looked fairly destroyed.
I removed this bolt, the turbo no longer whines but it doesnt produce boost. (i was mistaken in my 1st post when i said i got boost). So my car drives like....well...shit.
Any ideas? I am going to call turbotech tomorrow and see if they can have a look at it for me. I hope i dont need a new turbo (if so how much are they worth?). In the meantime, do you think its safe to drive thecar with the turbo not boosting?, everything else seems fine.