Got into a small discussion with a professor of mine about turbos. He was talking about superchargers and how they use the drive belt for operation and I mentioned how they are useful on larger engines that can take the small loss in power from the drive belt. I then said that although superchargers rob engine power via the drive belt, turbochargers also rob some power through exhaust restriction. He then told me that actually turbochargers rely on the EXPANSION of exhaust gasses, not the FLOW of exhaust gasses.
After all the reading and knowledge I've acquired on turbocharged systems, I don't think he is right on that. Anyone want to confirm?
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