Is this a fair radiator?

yellow rose said
I agree, I gave the simplified version. Because we are discussing decades old designs. Newer front ends are much cleaner that the older designs, so things have to be accounted for because of a lack of air at the front of the car at road speed with the newer stuff.

I also realize the fan is more efficient with a shroud, but how much efficiency does it need? And at what cost? If the air is packing at the front of the radiator because the shroud and fan can’t pass the air, you get into all sorts of issues?

I just picked one source for pump speed (Chrysler) but there are others that cover it in more detail. Evans coolant for one. They also say 20% over. IIRC so does Stewart Components.

Speaking of shrouds . I changed the bulbs in the headlights on my 2014 ram . I got to thinking about the upper radiator sealing flap , that keeps air from going over the radiator, completley enclosing the gill area to force the air thru the rad. , I`m thinking that it would help our old cars to do that, and would be better than my home made front seal trying to seal my fiberglass hood.
Gonna make one when I run across the right material.
Need about 67 x 6 1/2'' of something, preferably black and slightly flexable , and of course lite weight .-------------????
Would be another interesting experiment ..