"john smith" wrote in message
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[...]
For takeoff, the turbo should maintain sealevel power up to 12,000 feet
MSL, so full rich or slightly leaned mixture would be used on takeoff. I
think I would still lean for best power prior to releasing brakes for
takeoff.

You need to use full rich to keep the exhaust temperature down. With the
turbocharged engine I normally fly, in my airplane, about a third of the
fuel is used just for cooling (30 gph at full power, when theoretically only
about 20 gph would be needed for the 270 hp). The turbocharger controller
ensures that I am getting best power, without any fiddling with the mixture
at all. Even in an aircraft with a manual wastegate, one would ensure best
power using that control, not the mixture.

Pete