I tune like Brandon. I tune mine, and my cousin's engines. I always tune by sound down the straight and on corner exit on his. It's hard to tell during a race on the corner exit, so I try to get the LSN dialed in during practice. I will get him started, and go turn marshal and listen to it everytime he comes near me. I always tell him how to tune mine by feel and sound.
I always check out engines temp after every run, but I don't worry about it, and I have never seen our temps over 265.