Coolant flow

off topic but, a big truck with 400 cummins has a 1800 ci radiator and a fan bout 3 foot tall with a good shrould and 180 degree stat, grossing 100,000 lbs climbing a 20 mile grade at 6% dosent have a issue keeping coolant cool, its the pyrometer a driver watches, them egt's! if it gets over 1200 degrees them aluminum pistons become hot molting liquid and will blow out of exhaust and speckle the nose of the trailer if driver dont down shift, get turbo to spooling and pump some air threw the heads and cool off the egt's! now none of this has damn thing to do with cooling a old car, new car, drag car, nascar or a flipping space ship! but its was more entertaining and educational than pages and pages of post from grown men arguing like a group of 4th graders! ive seen good websites die on account of such and id hate to watch that happen to Abodys! theres always more than one way to skin a cat! there can be 2 ways thats right! there can be wrong ways that some how work when it shouldnt! but going back and forth for days that ya right or anothers wrong ant helping nobody but the folks that sale blood pressure meds,...dwb!