As I see it there are too possible choices.
You can use two evap cores like Tracy does or you
can use a one or two inch thick core of a wide selection of sizes.

In the first case the core total core volume is about 700 cubic inches
give or take a few.

In the second case it can be almost anything you want it to be.

Paul, I think that 700 cu.in. of radiator in an rv-4 cowl is a bit optimistic. I just recieved the exact same rad that Chuck Dunlap has(I beleive). Give me two weeks and I'll send pictures of the installation. Can Chuck give any information on how his cooling works? I know that you recommended just letting the air dump out of the bottom of my cowl, but I think that that is lacking in elegance(a serious engineering consideration). I've got what I think is a good cowl flap mechanism setup that, like I say, I'll share in a couple of weeks.

Brian Trubee
Making progress after all these years

Well Tracy does not think so :) If you use evap core it is probably not optimistic :)
You have a point though. You can always improve the cooling by putting more volume
in your heat exchangers. If two evap cores don't quite cut it put in three :)

All joking aside I think Chuck's core will work fine with a little aerodynamic tweaking.

Chuck, what is the latest on your cooling experience?

Paul Lamar
 
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