Originally Posted by Team Kamikaze

It depends on what type fuel you are using, also depends on the days Temp, Humidity, and altitude, normally I don't temp tune an engine, I will run the engine with a good trail of smoke coming out of the exhaust while producing good power, now when you are satisfied with the power then that is where you temp your engine and remember that temp, then use that as a reference in tuning your engine. keep in mind that different engines runs different temps.
The above tip is based on running the engine really hard.