Originally Posted by Chowbow
I'm going to guess that at 300km/h you're getting so much air flow that you won't be overheating even when pushing the motor really hard.
That is what I thought as well.
However, without the upgraded stock oil cooler (in addition to the ar design oil cooler), the oil temperatures were rising well beyond 135 degrees Celsius when I drove faster than 240 km/h for more than 20 seconds. When approaching 300 km/h, the oil temp was almost at 140 degrees, which made me upgrade the stock oil cooler.