I have tried everything , change thermostat from 195 down to 165. My electric fan was only pulling 900 CFM at best , so i went to a larger fan 1500CFM. its 46 degrees outside car temp 220. I have a 3 core aluminiumn radiator. no blockages and i did the water pump impellor , divider plate its like .020 away from the impellor. temp is the same just cruising at 50MPH no diff. if any it goes a little higher. Could it be the pump ?