I am surprised your coolant temp is getting that high. Did you change your thermostat for a low temp unit?
I would kill for 266 oil temps in 100+ degree ambient track days. On my TT RS (Loba hybrid turbo, catless downpipe, mid-cats deleted, Forge Race intercooler, 21 psi tune), I can get upto 280 for oil on 20-25 min sessions when beating the piss out of the car. I back off a bit when I see 280. Sorta sad to see that I’ll have to deal with heat on the M2 once I start tracking it; my Z4MC was rock solid on track.
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