<<2. To maximize range: If my cruising altitude will be 18,000 , should I
start leaning during climb as long as I watch temp limits?

3. Flying above 6,000 I have experienced loss of turbo power three times.
From 31mp to 23mp. Power is back in 6 seconds with a few seconds of surge. I
have noticed that high humidity have been a factor every time it happens, I
have been already leveled at my cruising altitude flying the engine FULL
RICH.>>

For max range, I always reduce power to 75% as soon as I can point the
aircraft in the right direction and increase speed to a reasonable level.  I
have no experience with IV's, but maybe 140 to 160 indicated?)  I lean to
cruise settings and let the rate of climb suffer.  It will take a while to
get to altitude, but you will be much closer to your destination and use
much, much less fuel to do so.

My experience (not in Lancairs) says that either the wastegate control lost
it (not likely) or like you guess, it is too rich - or maybe too lean.  Any
possibility of a fuel delivery problem?  What does the fuel flow say when
that happens?  It will go down regardless because of the boost dropping, but
does it go way down?

Gary Casey
ES project