Has anyone had problems with Entropy aluminum radiators????

[68sixspeed]

Regarding the flaps, I don't think they are needed. I have a 23" (big block sized) Afco aluminum radiator, two 1" rows in it with their full shroud which has a single ~2000cfm fan, Last few years I ran a 195 thermostat, it would run right on that, maybe 205 in traffic in the summer. This year I dropped back to the 180 thermostat, just ran the RTTS track day and granted it was cool but it never went over 185 at speed on the track, no trouble during autocross etc either. That dual fan setup looks nice, I think you'd be fine with that w/o flaps.