Reply to "Replaced radiator, now the engine is running hotter during stop and go driving"

Sorry, Joe- in my outline I assumed you had a shrouded sucker fan system with the shroud AND fans on the backside of the radiator (furthest away from the grille). And that both fans were spinning the correct direction. Is this true?

If so, all the electrical contacts between the fan motors and the battery including those on the fan relays should be thoroughly wire-brush-cleaned. The rated 2600 cubic feet per minute of airflow from (for instance) Flexilite shrouded sucker fans is with 13.2 VDC delivered to the fans. Wiring resistence can drop this to maybe 12.0V or even less, and the fans will then deliver far less than 2600 cu ft/sec. You or someone else can check this with a good VOM (volt-ohmmeter).
Alternatively, you can temporarily hot-wire the fans directly to the battery and purely from the resulting sound you should be able to tell if the air flow increased much. If it did, you've got wiring issues somewhere. Just don't try driving with the fans hot-wired; could be dangerous.