Are u using a good heat gauge, do u know what temp u actually reach in traffic
I had changed my heat gauge last year, and it reads the same as the one I replaced. So, I am thinking it is probably right.

Lay hands on a non-contact temperature measurer.
Interesting idea. I doubt I can come across one. And, it looks like the least expensive ones are close to $300. I think the Cool Tube will be less to start with . I'll put it on the fuel lines that are nearer the headers.