What is your peak EGT limit
Except for the TIT in your chieftan, there really is no such thing. Apart from anything else it will vary depending on probe location.
Sorry wrote that post far too fast to see that slip. The point was that LOP Heat is not an issue if the engine is operated correctly. LOP will go through peak EGT on the way and
if there was any problem with heat it would be at that point. As mixture is progressively leaned from peak all temps are reduced as the graph clearly shows. The limit of leaning beyond peak has nothing to do with heat, its about stable engine operation and effective power output.
The manufacturers write their books based on the lowest common denominator. They stay away from LOP because if they started even giving the slightest hint its ok we all know some pilots who would be sitting 50 LOP full power in the climb with the engine shaking itself off its mounts "But I'm saving fuel!". To their credit they do have a disclaimer there effectively saying that if you do have the right equipment to monitor the engine and know how to use it you may lean to your hearts desire....