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I have the same issue after the car is tracked (or AX'd in really hot days).
The problem is that the oil temperature gets too high and causes a significant drop in oil pressure.
For my car (Base 986, running Motul 300v 10W40, EBS oil baffle, Boxster S Oil cooler) the ticking happens when oil temperature hits 230F.
At this temperature or above, the oil pressure @ idle drops bellow 10psi and the tick becomes audible.
Under these circumstances - coming back to the paddock or after finishing an autocross run - I keep the revs above idle where oil pressure is 15psi or above (no ticking)
Of course, this is no real solution.
At this time, I'm hesitant to install a 3rd radiator. I wonder if using 15W50 would help minimize the oil pressure drop when the oil temp hits 230-240F
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2000 Boxster S
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