Quote:
Originally Posted by lateapex911
So I’m trying to dig up info on the new ac/heat system. I have a 73 911E LHD. With the RS plastic tank.
I’ve read the CR forum instruction and have a rough idea of the layout, components and needed changes.
So far:
- new alternator. And new wiring in a couple places. Engine is current out and I just finished some harness upgrades so now is the time for that.
- cut off drivers side batt box and cap, OR create attachment structure/fastening points and shields in drivers quarter for fan and hoses and heat excngr.
- figure out interior ducting and outlets. Dash is non AC. Acckk.
I’m currently planning on new carpets and doorcards and while I’m there it’s time to redo the audio. The existing set up has Alpine and Nakamichi amps in the smugglers box. The Nak amp stays, a classic a/d/s amp will replace 2 Alpines.
With the CR compressor going in the smugglers box all the audio gear needs a new home.
So… the big question is: what changes in terms of physical space needed will the addition of heat require? I assume that in a heat pump system such as this, that making heat is essentially reversing the normal flow of the core components so I’d anticipate changes to the components but no large item additions? Perhaps a reversing valve but there’s space in the smugglers box it seems.
Does anyone have any intel?
Other considerations: what have people done with the interior controls? It would be cool if it looks vintage.
Also. My dash is pretty new. In good condition. How to handle AC venting?I have decent fab skills.
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The new version with heat apparently no longer places the compressor in the smugglers box, it goes where the battery sits in the impact bumper cars. The battery then gets replaced by a much smaller Odyssey battery, thats sits right behind it. The CR website and blog has pics of the test mule running this system.
I assume this change was made to streamline CR's production and inventory, as RHD cars don't have a proper smugglers box and they had to offer 2 systems in the past.
As for condensor placement - left front is the cleanest in terms of routing hoses and for weight distribution. If your 911E is not that original anyway, or you don't foresee ever selling it, I'd cut it off and weld in the 911 ST covers from Restoration Design, ideally both sides so you can install a Carrera cooler with fan (slippery slope with your money...
) Otherwise, left rear is also ok, you will need to drill some holes and make some brackets.
As for the vents - easiest solution is to fit a F150 ball vent instead of the clock, together with the rotating underdash vents from CR. Although I have to say the aircraft vents from SpyderMike also look great.
The old system just required a single push button to turn it on or off, temp was preset by the factory (you can change it in the firmware). The rest was controlled by the existing control panel. The new system removes all this, along with the cables, blend valves etc, and switches to an electrical control panel with servo controlled blend valves.
Have a read here:
https://www.classicretrofit.com/blogs/news/2025-is-the-year-of-the-heat-pump-for-porsche-911s
Quote:
Originally Posted by SpyderMike
Here is one idea...I used aluminum aircraft vents. It was easy to route the hoses to them.
You could change the metal plate to something more "vintage" (and the switches too). |
Nice install Mike!
