Keep reading...
It's possible, but never the less you're talking out of your arse.
That's obviously not what we've been talking about.
... Considering a WRC car and a road driven STI/EVO are a "bit" different I would imagine they'd sound different too. I also doubt the WRC cars have BOVs that are blocked up. Either they have em, or they don't.
You say that BOVs don't flutter. Here you say they do.
I guess it doesn't matter anyway because I have a s15 stock BOV and even with 20psi it handles it fine and goes a nice woooshkaa through my piping when it "blows off".
Flutter - noun,
Rapid fluctuation in the pitch of a sound reproduction resulting from variations in the speed of the recording or reproducing equipment.
If we take out recording and reproducing equipment for the sake of what the word is being applied to here I think you'll find BOVs do flutter. They just don't cause reverberations unless they're tightened.
So thanks for dropping the IQ 200% ... :Bang: