Be specific as to where you are reading. (e.g.-in the collector or at the port exit.) If you speaking of your specific application from what I vaguely know of it I'd guess (<)1450*F at the port. Ideally, you could balance port-to-port EGT's with jetting or intake manifold manipultaion. I'd taylor your AF first and whatever your EGT is...it is If you know what I'm saying. Because spk adv. has a large effect.