been hapenin for a few days now... im not 100% sure it is the turbo im just asuming it is as the noise only seems to hapen when im at about 4/5psi... im stil geting full boost and holds though but it whines from 4-11psi dosnt whine below 4psi. i thought it might be an intercooler hose not tight so i had all my pipes off last nice,gave them a clean then put them back on this morning and made sure they were tight. dunno if this will help but on my way home from work today one off the pipes blew off.. i will say that it has got a bit of a dodgy jublee clip thought as i tightnd it to much then it went back(if that makes sens)..the pipe that blew off was the one with the dodgy clip anyone no what this could be?