Cooling help?

Like others have said. Ditch the flex fan and get a viscous clutch fan and a shroud. You shouldn't run without a thermostat as it could cause damage. Not running hot enough. Of course you don't have that problem. Assuming your water pump is in good shape and your radiator isn't clogged with crap. I would think you would be in good shape after a decent fan upgrade. I don't use a shroud, but I have one in case I have cooling problems.