Does BB turbo produce noise?

[Mr. Y]

Hello guys. I need help, asap =(
I've finally installed long waited 67dbb turbo and now I'm very scared...

When I shut engine off, I hear turbo still spinning for about 20 seconds. That's ok, I guess. But I don't like the sound that turbo produces after engine turned off... It's like steel ball rolling on desk.
Is this normal? Sound isn't loud, it can be heard with open hood only...
Turbo has 5 miles on it and about 1 hour of idle... No boost yet (Have to tune my standalone).

PS: I'm sorry, but it's my first BB turbo...

 

[IJ.]

My T04z does this it's much noisier than my 3540r was.

 

[sneakypete]

my boss does this too.... i like the sound. except mine spins for a good minute or so

 

[IJ.]

Yep mine will spool down for ages due to the accumulator suppling Oil to it

 

[HKS_TRD]

My 35R got louder and spins longer after I had the comp wheel upgraded to a larger one