Turbocharging can be set to two different levels:
Turbonormalizing, which brings manifold pressure to sea level
pressure; and boosting, which raises manifold pressures to more than
30" Hg. If an engine is boosted, the air density in the cylinder at
the bottom of the intake stroke could be well above atmospheric.

Dan

Careful, Bertie the ButtlippS cross-posted this a few messages back. You're
trying to explain something to someone on a kook group.