Without air flow through the radiator you’d end up with boiling water in the water jackets in no time. It would do more to overheat the engine than cool it. Also the turning motor is what propels the radiator fan. NO motor turning, no fan. Also, if your ramming front ends then how are you going to have running motors or even any steering for that matter. One hit and you’re out of the derby.
It absolutely no-worky here, IMO.
Thanks for playing.
Playing? Oh, OK. This was a game, I was supposed to be doing something. I missed that.
It was a joke, you moron. I never expected anyone to put a radiator in the back of a Demo Derby car.