We finally have some hot weather. Having 85 F is for us rare, but a good opportunity to test engine cooling. A Corvette C3 with a big block tends to run hot, but with a Dewitt radiator with dual fans, FAST EZ-EFI 2.0 and Vintage Air it works great. Cruising with air on max I ran max. 195 with fan setting 190 on / 185 off. Thermostat is a 180 F.