I may have sold my soul to the A/C Devil

[RNajarian]

This post is a follow up of one I started July 1, 2013. A link to the original thread is below;

The Reinstallation of a 911S' A/C - A Love Story

After I achieved my initial Freeway vent temp of 37.9 degrees, I got sidetracked with work for about 3 weeks. This was a great opportunity to see if the system lost any refrigerant. I started the car, let it warm up for 5 minutes then checked the refrigerant level. Fortunately/Remarkably the refrigerant pressure was EXACTLY the same as it was on July 1, 2013.

I decided to take the car out again for a simular road test as I did on 7/1/2013. The only difference is the ambient temperature was about 7 degrees cooler today. ROAD TEST #1- With an ambient temperature of 85 degrees, I achieved in town vent temperature of 43.7 degrees



And freeway vent temperature of 37.9;



The only changes to my system since the 7/1/2013 test run was that I hooked up an electrical relay to power a fan to cool the front condenser. I have not yet cut the belly in the front trunk over the condenser.

The ambient temperature of Road Test #2 was 78 degrees. The in town vent temperature was an improved 41.3 degrees (sorry no photo)

I would have been happy to repeat my earlier success of 37.9 degree vent temperature on the freeway, but much to my delight I was able to better that temperature and then some . . .



I cannot explain how a stock 911 A/C system is able to preform as well as mine. Perhaps I sold my soul to the 911 A/C Devil, or it isn't that hot to really test the system. Admittedly today's temperatures were cooler than before (78 vs 85 degrees), and the 7/1/2013 ambient temperature of 85 isn't Texas hot (or East Coast hot), but a delta of 45 degrees is a victory in my opinion.

The next step is to install the front condenser fan, I have already wired in a relay to run a fan to cool the front condenser. Though I have the OEM front condenser fan, I chose not to use this fan because I did not think that it delivered enough air to do the job.

There are a LOT of great aftermarket products available which will cool the front condenser, however since I had a lightweight marine (nautical not USMC) fan (with squirrel cage) which delivers 150 CFM, I chose to hook up this fan. When hooked up to a 12v battery it really delivers a lot of air.

As soon as I can get this fan in place I will take the car out for road test #3. I will try and test it on a hot day (90s or hotter) to see how this system performs under pressure.

Thanks for Listening

[SilberUrS6]

So, is your soul worth the couple grand or so you could have spent with Griff?

[RNajarian]

I plan on upgrading all the hardware . . . I wanted to make sure all the "T"s and "I"s were crossed and dotted first. Once everything checks out, it gets replaced.