Yes, Turbo really costs nothing in HP
losses, other than back pressure in the
exhaust, where a SuperCharger has a
drag penalty, all the time, more in times
of boost, and less in times of idle, but it's
always there.
On the other hand, a Turbo requires lots
of cooling oil, like a liter per min or more,
and a SuperCharger can run on CCs per
hour and be fine, starve a Turbo at 140,000
RPM and see how long it's "fine" for
Wild