Well according to where I work that's why they do. They have a 2jz in a very popular drift car. And use a wastegate as a bov but instead of venting to the atmousphere it vents into the exhaust manifold plus they have 2 small cylinders of air that will shoot into the manifold aswell Sounds like a shot gun firing when the cylinders relieve the pressure. You would think it wouldn't work but well the turbo spins faster out of boost
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