Geert, ive seen the same on mine lately although ive got the tiny 0.48 housing on my T34. Its a bit odd though is ive never seen temps above 820. Then I took it on track and suddenly it peaked at 898 and 901.

Could I really blame this increase in temp on the fact it was on track or should I seek for other explanations? Think I will invest in a wideband device to check how its running.