Alejandro
Improve cooling system don't have a big impact in engine wear rate. It's better to spend tokens in a new engine every race.
It's non sense to say cooling have an impact in tire temperature.
Trust me.
I change the engines after every race, I always have fresh engines in every race.
But with a bad cooling system, at the end of the race your engine will be more consumed than the engines of your opponents.
So, you will have lower power.
Furthermore, with a bad cooling system you always have high temperatures in the car.
The tyres will overheat more faster, and as a result you will be forced to decrease the push level.
I have won only two races in these conditions: Australia (with 9 grades of temperature) and Germany (with 11/13 grades of temperature).
I'm not writing this without knowing what I'm saying.