Using a hayden Server Duty fan clutch with a 10 blade fan and reading the temp from the output of the intake (as it goes to the heater), I'm getting 195-205 average with an occasional 210 spike depending on what I'm doing.. I've never seen it go over 210F.
Oh yea, we run a 30% coolant to 70% water (give or take some) with a 16 lbs radiator cap..
Those temp are coming from an Isspro 270 degree sweep gauge, so it should be somewhat accurate.
Oh yea, those are non winter temps. In winter, It runs about 190F (Az. Winter).
~Mark