Here are the recommendations of Lycoming:
http://www.lycoming.textron.com/supp...fs/SI1094D.pdf
Although I don't fully agree with them as in I lean in the climb already but I use a climb speed which is about 30 knots
above Vy and with the G1000 I have EGT and CHT for every cylinder accurate to the degree.
These "old school" engines use extra fuel for cooling. even though they are officially air cooled engines they are actually cooled by three things:
- Air- exterior, cylinder head and cylinder barrel
- Oil- interior
- Excess fuel-combustion chamber and cylinder head temperature
Climbing 30 kts above Vy removes the extra fuel requirement which allows you to lean in the climb as soon as you leave the pattern.
Unfortunately most of the spam cans out there only climb at one speed and have no equipment installed for EGT and CHT.