It really depends on tuning..

With the stock ecu and injectors, I usually hit ~1400F cruising at 80mph. At idle about 800F, at 60mph about 1250F. On Hondata, and 440cc injectors cruising temp is a bit lower at about 1300..at WOT full boost I've hit 1500F. It is very dependent on tuning, timing (cam and ignition) and plugs, and let's not forget the location of the thermocouple