Originally Posted by 1Ton_tommy
I don't need more airflow. I just need to be able to shut off the fan when it's not needed.
You need air flow from a fan at slow speeds, and also at "2800 RPM" (your words). So under what conditions do you not need the fan at full flow?

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission