[cycleguy55]

How fast was the engine turning when you ran it for the times listed? Was it idling or running faster than that? I've found my temperature drops when I rev it up a bit - the water pump may not be moving enough at low RPM.

I don't know what the CFM is on that fan, but the fact it's not ducted or shrouded to the radiator significantly reduces it's effectiveness. Electric cooling fans move a lot of air - probably much more than that garage fan. Consider it's not uncommon for them to draw 30 or 40 amps - or more. This setup is 4,000 CFM and 50 amps.

Coolant temperatures don't seem that high, quite frankly, especially given the unshrouded fan. Radiators under pressure won't boil over until they're over 250 deg. F - add ethylene glycol and the boiling point is raised further.

Edit: Never mind...