water pump and pulley selection

Rat Bastid said

I use the Milodon pump and run the pump at least at crank speed. Keeping the coolant in the radiator keeps it in the block longer. Think that through.

You want the coolant out of the block sooner. The higher the temperature differential between the coolant coming out of the block and ambient air temperature the less cooling you have and you work the cooling system harder.

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I think we're splitting hairs here... and, like anything else, depends on usage. Where I'm at, it's Hot. Then, it gets Hotter. If Ya Have the Airflow, that helps. The entire point of having Cooling Fins on a Radiator, is to Dissipate the Heat.... not disagreement, but when, Ambient Temps, are wacked, sometimes letting the Rad do its Thang, is pretty damn important... now, going back to Airflow. I was metal framing, and hanging board, with a Vietnam Veteran, for some Years. Good Personal Friend. The fan blew off his F-150, trashed the radiator, out by St. Augustine, I was in Middleburg. Over an hour away. I took him a Radiator, plugged it in, NO FAN. yes it was Wintertime in N FL, And Yes, I asked Dennis to roll about 50 ( NO One Told Dennis ****!) Never overheating on the way back. We may have missed a TCD once or so...