> The alternate air system needs to work, and it
> needs to be improved as hot cowl air makes for hot CHT's.

I would suggest that the reason the CHT's get hot with alternate air is that
the mixture has changed.  This would, of course, depend on where the mixture
was set before the alternate air was introduced into the engine.  Simply
saying that hotter induction air makes for hotter CHTs would not be correct,
as in many cases, the hotter air actually will result in lower CHTs.

Re-setting the mixture will correct this problem.

Walter Atkinson
Advanced Pilot Seminars