That wasn't me, But, one Harrison GM evaporator core will cool one rotor at speed. They allow for a wide latitude in placement. Ed Klepis ( 1-270-898-3776 or e-mail twelding@apex.net.) can build you anything once you decide on what is needed and Another core in the cabin with a pancake fan and a valve can supply cabin heat and emergency cooling, should it be needed.

 

Lynn E. Hanover

 

 

 

 Greg,

As Lynn suggested 3 cu" per HP seems to be the rule of thumb. Of course you could go smaller if you have everything just right.

I like the oil to water rad as a secondary oil cooler as it heats the oil on start up.

George ( down under)

No, actually, I was trying to get a sense of the size of radiator I would need.  Still discussing size, and thickness.

Greg