Originally posted by FastX7
It's not actually "robbing" power. It's just holds the car in vaccum a little longer until the turbo spools up to positively pressurize the manifold.
Well that is partially true, but the turbo is still an exhaust restriction causing back pressure. Back pressure= power loss. The only way you could do it with no power loss at all would be to have the compressor powered by something completely separate from the engine: not belts, not exhaust.