Pulley Diameters

The water pump is not a pressure making pump. It is a flow pump. It does not create pressure. It only moves water. C's car has zero overdrive on the fan pulley right now. She lives in Arizona. No way would I not make a change and not make it a significant one, which is why I recommended the larger difference pulleys.

All that being said, 210 isn't over heating anyway, BUT the water pump is SUPPOSED to be over driven with A/C and it's not.