Pelican Parts Forums - 911 A/C factory upgrades

Pelican Parts Forums (http://forums.pelicanparts.com/)

- Porsche 911 Technical Forum (http://forums.pelicanparts.com/porsche-911-technical-forum/)

- - 911 A/C factory upgrades (http://forums.pelicanparts.com/porsche-911-technical-forum/621862-911-c-factory-upgrades.html)

85 Cab.

We need to talk. Please contact me at the "email" section of my profile.

We are in the middle of doing several 911's over here in Phoenix with the help of some very good tech people... very good people who used to work at another un-named shop here in the valley.

Pls shoot me an email when you can.

Thx,

Joe A

Also, as an aside, the 964 stock AC might be somewhat better than the stock Carrera or SC, but not by enough to make it worth "upgrading" to a 964. I think it makes far more sense to upgrade the existing system. I am starting a piecemeal rejuvenation of mine this week, replacing the evaporator with the Rennaire unit from our host.

There is no free lunch. Some upgrades of the stock system make perfect sense. Change out that boat anchor original compressor for a new rotary compressor. Have to change out all the old rubber lines. I never thought of putting in hard lines from front to rear but that would eliminate a lot of hose. There is about 40 feet of hose in a 911. In a normal car, maybe 6 feet of hose.

I changed out the compressor, hoses, new rear condenser because of broken line in original, new dryer and expansion valve. I stayed with R-12 which is expensive and hard to find (eBay and Craigslist}.

I'm getting about 35 degrees at the additional lower vent I installed on a 90 degree day and about 40 on a 100 degree day. Marginally OK. I did my own installation and trouble shooting with some verbal assistance from a friend who is an AC tech. The cost was about $1400-1600 including the charge of R-12. I don't think R-134 would work any better, probably worse.

Probably changing out the two condensers for more modern would have been a good idea in retrospect. I did add two fans, one a puller and one a pusher in the whale tail wired into a relay and triggered by the AC switch at the compressor.

By the way, it took several days of hard work to "restore" the system to its current "operational status". If you are thinking of having an AC shop do the work, you better plan on at least 12 hours of labor.