No.... You can use engine temp as a guide, but every engine will run slightly different at different temps - even 2 engines that are the same will need to be tuned slightly differently.
Basically, you want a good trail of smoke with good consistent performance and keep your temps below about 250 degrees F. I've had cars before that run great at about 200, while others have needed to be up to 260 to get the best out of them. As I said, temp is a guide only....