OK... so even a steady 30 mph isn't enough air to do away with the need for a fan?? I always thought that was fast enough, but apparently not!
My temps do not climb at higher speeds, they just don't go down (like yours do). I expect to run just above t-stat temp when doing 60 mph, and that is not what happens, either with the old 26" copper rad or the new 26" aluminum one, and a high-flow stat.
The water pump is slightly underdriven (stock non-a/c pulleys). I'm going to replace the pump with a Flowkooler high-flow unit, and will also then find out what's in there (hope it's not a 6-vane a/c pump, I can't recall).
