To the OP of this thread, the answer to your question is yes.
Yes, a BOV does make that whooshing sound between gears when your turbo is making boost.
Sorry, got confused. Saw BOV in your post, and thought it was another noobie asking the dreaded BOV questions.
Perhaps if there were a "Nasioc 101" orientation that all new members had to run thru before being allowed to post, we would see a lot less of the same questions that keep getting answered badly, and would severely deter this new breed of forum spammers from clogging our boards with ridiculously priced merchandise that no one can take seriously. Its a win/win situation for the rest of us on the boards, and gives the noob members a jump start about the correct use of the forums when they have questions.
The site could also adopt a no spoonfeeding policy, and just reinforce the fact that anything that can be done has most likely already been done and covered, and is only a search button away from being discovered.