Pulley Diameters

My thinking was that only so much liquid can pass through the opening of the thermostat so tryig to move more is pointless....apparently I was wrong.
But if this is a car that idles and slow drives in traffic I guess it makes sense.

I think each application might be different and have to wonder about the effects of a very low geared car or a drag car. The concern being the rpms of the fan/pump at 7k thru the traps...

I have changed to an O.D on my Cuda since it is a cruiser with 3.55s but will experiment with the 408 solid roller cam 3.91 geared Swinger.

I had a waterpump shaft shear while reving a 454 so I am a bit nervous about that ...lol