RE: Tuning - Temp vs Performance
exesive heat is bad. heat can cause preignition and detonation killing preformance and hurting the cumbustion chamer. too much heat will seize CB and crank bearings the latter will wear down a crank. a mixture that is too lean will not allow enough fuel into the engine so most of it will boil off before reaching the combustion chamber. too much heat can make a hole in your piston or even melt it.
i have been told that the S-25 likes running around 300*F so im not saying that no engine should run over 300 just that 280*F is a good place to stay below for most engines.