Originally Posted by 1911A145
because... bullshit. lol
I am not sure about losing 5-7hp as I have seen no data on this. I would say theoretically at higher rpm where our stock turbo struggles would see some benefit having air recycled back after the turbo.
Now, BOV has been run on many N54 without any report of loss of power so it might not be significant.
That swoosh sound many people like to hear carries some energy - but probably not that significant.