Temps
This is just a guide to use. Unless you are checking every exh. port which is a good thing for NOS use. You could be checking the port with the most, or least temp. When using these EGTs it is best to watch your 2 hottest ports 1 on each bank. How many probes do you have in the headers?
Which this info would be taken from the dyno. It is very hard to say what you are watching is real accurate for your application. Patrick is correct, jet it up till it slows. The temps you are seeing is pretty normal.
GOOD LUCK