Multiple a/c condenser question; adding 964 condenser

[wwest]

Originally Posted by RSTarga

As in the 964 the fan runs when ac is on. Eliminates rear condenser. Less weight at rear. Win,win solution. Also no engine heat.

Fans are only really, truly productive when high side pressure is elevated. Some cars use drier inlet HIGH temperature to control/power fans.

Looks as if the drier pictured was once set up that way.

[zippy_gg]

Originally Posted by RSTarga

Here is 964 codensor on a 911

Sweet! Do you have a build thread by any chance?

[khamul02]

Is anyone else using the 964 condenser with a compressor in the back?

[Uwon]

I have been using the 964 condenser on two cars covering a period of over 20 years using a 993 sourced compressor and a belly pan condenser from an ‘86. More recentlyI upgraded to the Griffiths evaporator for additional benefit. See
Evolution of a Carrera RST
System works well.
Johan

[khamul02]

I read that people only need this condenser. It would be great to lose the other two if possible.

[GH85Carrera]

Originally Posted by khamul02

I read that people only need this condenser. It would be great to lose the other two if possible.

Running the one condenser in front means no more washer fluid for the windshield and headlights. For people that actually drive the 911, that is not a great idea, the washers are very useful in my experience.

I spent the money, and it was a hunk of coin, for the full 4 condenser Griffith's system, his evaporator, and hurricane blower.

I just returned from a 3,500 mile road trip to Palm Springs, CA and back through the southern routes and stopped at places like the Very Large Array telescope, Truth or Consequences, NM, Alamogordo, NM, and Roswell.

It was often 105 and up to 107 driving all day, 11 hour days. The AC blew at 37 degrees and I was never once hot, unless I was outside the car. The toughest challenge the AC had was at the Space Museum in Alamogordo, NM. The car sat in the full sun for 45 minutes in 105 heat, after being driven for over 6 hours.



When I got in the car it was over 120 degrees inside. Within 5 minutes, I was getting 37 degree air at hurricane blast fan settings. I was cool and comfortable within minutes.

If you live in the north, and never drive in the desert southwest you may not need the full cooling of Charlie's system. If you live in the south you will love it.

[khamul02]

I thought people converted to a boxster window fluid reservoir to solve that issue.

[Uwon]

Originally Posted by GH85Carrera

Running the one condenser in front means no more washer fluid for the windshield and headlights. For people that actually drive the 911, that is not a great idea, the washers are very useful in my experience.
.

One can also use the headlight/high intensity W/W reservoir from a later G model,…this one from a ‘86. All the necessary holes are usually already stamped on the inside fender.



Naah…we don’t drive much


Add 70,000 km for the speedo changed under warranty.

Cheers,
Johan

[FA-18C]

Uwon - did you run the the belly condenser 1st, then to the fender condenser? I am considering and plotting. Right now am planning on the CR system, run to a new Kuehl front condenser (without fan) in the 3.2, then over to the CR condenser with fan in the fender, drier in the original spot, and into trunk. I did the same intensive bottle washer install in the spring. Have driven the car 3 months and have used maybe 5% of the reservoir, and the shorter distance makes the system work great.

I removed the fan to the front condenser and am considering putting the compressor there instead of the smugglers box. Shorter wiring. I can put my tools in the smuggler's box then.

Thoughts from the experts?

[GH85Carrera]

The front condenser will have very little air flow, if any at all, without a fan, unless you have some form of ducting. Condensers really need the air flow to exchange the heat to be of any use. They will not condense the refrigerant without a way to dump the heat.

I understand trying to make the AC system as small as possible to have more room for other things. The only way to find out for is to try it.

[FA-18C]

There is airflow under the car when moving, not so much in traffic, I get that. The front would be the initial condenser, and then flow to the 2nd with fan in the fender. I may end up moving the compressor to the smuggler's box and reinstalling the front fan and upgrade it to the Kuehl condenser and fan. Those two should cut the VA heat.

[Uwon]

Glen and Chris, in my setup I have the 964 condenser first followed by the belly pan unit. I read somewhere that it should be the other way around but I have left it as is as the system works great for us in our climate. I did note a notable improvement when I installed the Griffiths evaporator.
The ST hot rod I’m currently building will have the whole Classic Retrofit enchilada with two condensers with fans, one in each of the driver’s side fenders. I’m looking forward to a real word comparison in about a year or so.
Cheers,
Johan