Been running a CAS V2 with a Nick McCale radiator and Intrepid dual fans for a decade. The highest coolant temps I can remember seeing was during the Woodward Dream Cruise many years ago, which was hours of stop and go traffic. My recollection is that coolant temps didn't get over 205 with the AC on.
A good radiator and good fans are important. So is making sure that the grill is sealed to the radiator so that hot air exiting the fans can't recirculate back through the radiator.
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