IO540,
From my post on the
other thread that I referred to:
The fuel flow into the carb is dependant on the volume of air passing through it. The volume of air, for any given throttle setting and engine speed, will not change if you apply carb heat. Therefore, the fuel flow will be identical.
What does change, though, is the density of the air. Warm air is less dense, therefore there is less mass of air going into the engine (or, to put it another way, fewer molecules). If there are fewer molecules of air, then you can't produce as much power, since you need the air for the fuel to burn.
Once you accept this, the idea of carb heat increasing the power on an over-leaned engine makes sense, as per my earlier post on this thread.
FFF
-------------