Thanks Denny,
Thermodynamics was never my strong point in engineering. This really helps as far as the automotive radiator. This is probably the best and easiest to understand presentation I've seen. You need to be a professor if you are not.

I'm on the way over to my son's place, this in hand, to look at his cooling system on his sand buggy. I think it is actually plenty adequate and I need to convince him that trying to run at 160-170 deg just isn't necessary. His stock fan doesn't even come on untill 205.

My street rod runs just fine at 190-200 regarless of outside temp. Mostly by accident but after reading your article I see why now. I'm going to try and measure some temps at various points to better understand what is happening.

On the Dodge diesel trucks we have a cooling issue with the injector pump that some guys have tried to understand and this lecture will certainly spread some light on this.

Again thanks for the great lesson.