Autocrossing I ran them at 23 in front, 25 in back.
Road racing I ran them 33/34 (front/back) and they heated up to 136 after 15 minutes at Thunderhill. This was before Brad rebuilt my suspension, so I'd assume on a car properly set up (like yours) they'd get hotter.
BTW it was fun going into 8 at Thunderhill flat out (counterclockwise) and watching the 911's behind me brake. Pulled them about 8 car lengths there. The only problem was if you started the straight with a 911 right behind you.... they’d pull you 8 car lengths before you hit turn 1 and started to reel them back in again.
But as Hank Watt's says, if the car behind you catches you, he's faster. Sometimes we have to feel good just doing that, but the 911 guys simply hated (HATED) to pull over for a 914.