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A wastegate being opened partially at low throttle openings is certainly a concept I've never heard of, but then I don't get out much.
The compressor side of a turbo becomes an inlet restriction if the impeller is not turning. Modern efficient impellers with swept blade tips need shaft power to move air through them.
Strange concept about the wastegate, but I suppose there may be some hi-tech tuning like this that results in certain performance gains.
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