Thinking of Upgrqading the Compressor

ruf-porsche · ruf-porsche's Garage

With the recent posts of 32 degree vent temp, I'm thinking of upgrading the old York compressor in my 82 Targa.

I can use a mini York which would look similar to the original York except that it is smaller. Advantage it would look stock and use less power to spin. Disadvantage it may not get me the 32 degree vent temp.

A brand new sanden 507 wobble plate compressor. Advantage it brand new and I have all the mounting plate and hose to make it work. Disadvantage it not a true rotary compressor.

Seiko Seiki. Advantage it's a true rotary compressor and was remove nfrom a 930 so it should fit with out any problems. Disadvantage it not brand new.

A nipondenso compressor from a late 911. Advatage it has all the mounting plates so it should just bolt in. Disadvantage it is use and it has o-ring fitting so I would have to get some new hoses made up.

Another nippondenso from a 911. Don't know which 911 it came out of but it looks similar to a sanden or seiko seiki compressor and it has all the mounting horadarw so it should just bolt up.. Disadvantage it also has o-ring fitting so I would have to get some new hose made up.

I plan on keeping with R-12.

Jim Sims · 09:41 AM

Any will work as the problem with 911's is condensing not compressor output. I would avoid using the reciprocating York's due to the inherent shaking forces they make unless you desire the original look/configuration. IMO the difference between the many piston swashplate units and a "true rotary" is insignificant. If fact, given the precision and tolerances typically required for the rotary compressors I would wonder about their longevity in this type of service. Machine down the edge of the outer Sanden pulley groove otherwise it will likely make a dent in the engine lid.

A simple, inexpensive adapter fitting is available to hook up a female flare hose fitting to an o-ring fitting trimmed compressor. Then no hose fitting change is required. As an alternative there is often enough slack to cut off the existing flare fitting and swage on an o-ring fitting in it's place using a portable swaging tool.

To get colder temps you perhaps should consider a condenser upgrade or the installation of a subcooler (Procooler). Cleaning (or updating) the evaporator is also helpful as is sealing it better in the evaporator/blower housing so less air is able to shunt around the evaporator heat exchanger surfaces.

rfuerst911sc · 06-25-2006, 08:23 AM

I personally think the Sanden is the best bang for the buck but regardless of which compressor you pick you'll need more than a compressor change to achieve 32 degree vent temps. You either have to add more condensor space and/or a procooler to achieve those temps.

rnln · 06-25-2006, 04:49 PM

ruf-porsche,
We should call you Mr. AC collector

ruf-porsche · ruf-porsche's Garage

Quote:

Originally posted by rnln
ruf-porsche,
We should call you Mr. AC collector

That's not the only thing I collect. I use to have a nice collection of Lotus cars including a competition formula ford.

Jk369 · 08-24-2006, 09:01 AM

I was thinking I would end up changing my compressor and the sanden 507 looked like an easy retrofit. I have had good luck in the past with bone yard parts in th past; do you or anyone else for that matter know what the interchangeability to other vehicles and the sanden 507 is?

Also I am using 12a refrigerant in both the 911 and my pu and it works great.