I understand that. What doesn't make a whole lot of sense to me is:
if the air you blow off get's immediately re-routed back into your intake tract, what was the point of even blowing any of the boost off? Unless of course the pressure on the way back to your intake is greatly reduced somehow.
It doesn't seem like that solves the problem, to me. If it's one big circle of air pressure, it seems like the recirculated blown-off boost is just going through some hoses and back into the intake at the same density/pressure it was "released". What am I missing here?