In article ,
Larry Dighera wrote:


That's what I was taught. Often it only takes 10 - 15 seconds to
clear/burn the carbon deposit without the necessity of leaning. I
don't see anything abusive or abnormal about this procedure, as the
engine sees full throttle on each takeoff.

A difference between a runup and the takeoff roll is the cooling air
flowing thru the cowling when moving. There is very little airflow when
stationary, even with high power settings. I'm not saying you shouldn't
do a high power runup, but you should be cautious and aware of the
possibity of heat problems.

--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html