I think because my 1979 Alfetta Sprint Veloce has an air conditioner, engine cooling seems marginal when the ambient temperature is above 80 F (27 C).
When running at speed, the temp gauge indicates a normal 175 F. But when stuck in traffic, though the engine doesn’t overheat, the gauge goes halfway between 175 F and 250 F (79 C to 121 C).
I had the radiator checked at a radiator shop; they said there’s nothing wrong with it. I’ve bled the cooling system at the pump and thermostat and use Red Line Water Wetter in the coolant.
In an effort to help with cooling when the car isn’t moving, I replaced the stock electric fan with a new one. My reasoning was that a fan with a modern design might be more efficient. I bought a model 390 Flex-a-lite S-Blade fan< . It's a 10" fan that advertises 775 CFM. The space behind the radiator doesn't allow dual fans or a larger fan. The new fan doesn't seem to make an difference in cooling. I also thought about using the new fan to replace the one in front of the A/C condenser but I wasn't sure I'd be able to remove the old fan without removing the radiator and A/C condensor. I know the old fan won't come out through the gills below the bumper. I haven't removed the grills yet. I cleaned a few bugs off the condenser, but even when the A/C fan is on, I can't feel much air coming through if I put my hand behind the radiator.