See the first post.
When the cars first pitted after a run, they were all very close in temperature. So, as long as the cars are running and there's a good quantity of air available, there doesn't seem to be an issue.
That's the supercharged cars as well as the turbo cars.
It's when the car sits that the temperatures rise. The turbo heats up like a pizza oven and the bonnet acts like a radiator.