Radiator Size ????

Rat Bastid said
Did you read the links? I’m not building tractor **** or HVAC.

Tractors ( as in truck) can run at high loads at low speed, which generates lots of heat, so you would need an effective radiator and they make them in 4 core.
Point is, it's not real bright just to say that more than 2 cores are junk.

Rat Bastid said
more cores, multiple pass radiators and junk like that aren’t what should be used.