30.1? You mean 31, don't you?
I suppose you're just rolling into the turn a little too fast and you get back on the throttle too early, which means that you "drive on the right front tire". But it doesn't make you faster as you probably go a longer way around the corner. Please post a few race laps (3-5 maybe), I think that'll help to find the mistake very quickly.
Btw, at 70°F, I can hardly keep the RF tire at 230°F, only if people around me start very slowly as well. 235°F is a more realistic value.