I decided to install the electric fan that is designed to be used with the mechanical fan. It has been in the 90's here lately, so I figured it's a good time to try it out.
I haven't seen much difference in engine/transmission, etc, cooling. The engine is still running around thermostat temp, and the transmission continues to run in the 90°F - 130°F range.
I have seen a pretty good improvement in A/C performance, though.
With just the mechanical fan, the output temp of the air from the center vents has been in the warmer half of the 20° range of acceptable performance.
For example, the acceptable output temp at 90°F ambient is 48°F to 69°F, when all the controls are set for MAX cooling.
With just the mechanical fan, the output temp has typically been around 60°F. Not great, but within the acceptable range.
After adding the electric fan, which comes on when A/C is selected, the output temp (@ 90°F ambient) is in the cooler half of the range, around 52°F.
So, when it was in the mid 90’s, with the high sun beating down on my black Jeep, there was a very noticeable improvement in the A/C’s ability to keep it cool inside the Jeep.
Last edited by ronjenx; 07-22-2013 at 09:20 AM..
Reason: corrected 2 typos