Guys, it's not a pissing contest... I just want to know how many deg higner was the operating temp of a pc vs non pc engine. My guess is less than 5deg F. We are talking about heat transfert. A small coat of paint cant make a good running engine over temp, i dont buy that at all.
Like i said, maybe on a pipe, wich is thin walled and doesnt have the same 'cooling mode' as a LC engine with thick wall and coolant circulating.