One thing you learn about high end performance cars is just the sheer amount of heat they spew at all times. From everywhere. Part of it is they have far more than a single radiator. Once you start crossing $100K USD a fair number of cars start getting to 3-5 heat exchangers (even NA cars!), and it climbs from there.
Road going performance cars have fans first to help get things up to temperature for emissions, and after that, for when you’re at low speeds or stationary. So you don’t overheat (or catch fire) when you’re stuck in traffic after having the car at high load.
Race cars tend to not have any fans near their primary heat exchangers. You get more airflow without fan blades creating impedance, and you just rely on the airflow at speed to do all the work.
The Formula 1 Tech Talks had a discussion of heat dissipation in the cars. The interesting part was the limited space available between engine shape and aero requirements means that a lot of very hot parts are squeezed together.
I think this was the link...but not sure. They've covered the topic a number of times. The whole tech talk series is worth watching. They have a lot of visual demos of different design aspects of the cars.
https://youtu.be/AC0eOfQl1d0
Road going performance cars have fans first to help get things up to temperature for emissions, and after that, for when you’re at low speeds or stationary. So you don’t overheat (or catch fire) when you’re stuck in traffic after having the car at high load.
Race cars tend to not have any fans near their primary heat exchangers. You get more airflow without fan blades creating impedance, and you just rely on the airflow at speed to do all the work.