Every pound of radiator cap pressure raises the boiling point of the cooling system by three degrees. So, a 13-lbs radiator cap (stock) raises the boiling point by 39 degrees before it discharges into the expansion tank. However, a 50/50 coolant mix normally boils at 222 degrees in normal atmospheric pressure, so it is definitely not going to boil-over. The internet suggests that 220 is normal for a running motor.
I'm running a 2F without the smog pump. It is critical that the tension for the belt running the waterpump is correct, as the Owner's Manual tells me to check it in the event of overheating, but, because there is only one belt running the waterpump (smog pump delete), and it is at an obtuse angle on the 2F, it is probably more significant of a check. Maybe a radiator flush is in order for this engine? I've never done a flush, or chemical clean-out, to my system, but, I do a coolant changes, before they are due on the maintenance schedule. I don't think that your motor is running hot, but, I'd imagine that many of these 2Fs are subject to well or aquifer water that can clog radiators, or ruin seals with chlorine or chloramine, or the coolant is just old (two years). Use pre-mixed coolant, or use distilled water to fill or flush is my approach.
The infrared sensor seems difficult to interpret, at best.
