My turbo is whining...the police siren noise. and whistles louder than it used to. so from what i've read the main bearing is worn which means it hasnt got long left.

but, will i be losing power due to this? when i first got the car, it sounded fine and was pulling well. now the turbo is whining, it still seems to go as quick, but is it? surely i must be losing power. or is every case different?