David Megginson wrote:

That's a brilliant suggestion -- I'm assuming that you leave carb heat
on, so that there's still an air supply into the cylinders.

Carb heat does not provide an alternate air supply to the cylinders. It
bypasses the air filter, but the air still has to pass through the carb
and the (blocked) butterfly valve.

George Patterson
The optimist feels that we live in the best of all possible worlds. The
pessimist is afraid that he's correct.
James Branch Cavel