The cars are always going to overheat tandem racing. The car in the back gets little to no air, the nationwide cars can do it for longer because of the cooling packages NASCAR allows them to run. Nascars cooling package on the cup car is so little that they cant even get close to the car infront for more than a lap or 2.
This years version of pack racing sucks. It's not like the pack racing of right before tandem racing started, cars arnt 3wide 13 rows deep, it's 2 lines of cars that can't pass. The last 20% of each race was exciting but the first 80% of the Nationwide race was 1000 times better than the first 80% of the cup race. Tandem racing needs to come back by fall Talladega.