Excessive whine will either indicate failed turbo bearings or damaged vanes. Both of these cad cause the vanes to rub on the cold side housing causing the whine. However, If there's whooshing with it, I'd suspect normal turbo whine, with one of the intercooler hoses failing under boost. I've had this before in a Subaru. It would also account for bov sound as your car should have a bypass valve (plumbed back bov) from the factory.