Don't remember any exact readings, idle is around 650-700, short blast to 3rd got to 1550. Don't use it really, it came with the car and I had a hole to fill in the overhead pod :biggrin: Since added alky and changed timing.
Here's a c-n-p from S.Woods site:
"Most Regals seem to run at their best at Exhaust Gas Temps somewhere between 1500-1650 degs. It's up to you to determine where your car runs the best. Don't assume that the highest temp without detonation will generate the most hp. It will take several runs to determine what your car likes. This depends on probe placement as well as engine combination and fuel quality."
Where ever you put it, start your logging of temps and kr. That will be YOUR baseline. Remember all the variables that come into play when tuning.When you change something, EGT will change (however slight)
Use it in conjunction with other data logging. Knock counts and timing is the main concern to keep the parts where they belong.