Thanks for the responses.. I have a unknown 6 blade fan and an unknown shroud. It's an automatic and it never boils over and never really runs cooler than 190 no matter the weather. 180 thermostat.
A quick test that I would recommend is when the engine is running hot, run the garden hose and spray the radiator fins with water... If the engine temp goes down 10° or more, then your radiator is not keeping up.... You may need better air flow through the radiator at idle/low speed or look into a larger capacity radiator...
Advice on radiator: Don't go with too thick with getting carried away with rows (4 row, etc...)... Rows add thickness, thickness is more resistance to airflow... Too thick can restrict airflow, so I would recommend three row and no more... You get more benefit with increasing the area vs depth if you have the room for it...
