How difficult is it to install a rear A/C?
#16
Track Day
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After getting the rear hatch to seal better, the A/C works MUCH better. It has always blown cold out the vents but the interior never really cooled off until now. Thanks for all the replies which has undoubtedly saved me a bunch of work and money! I'm definitely not going to install a rear A/C now that the front system is cooling the car well.
I've just posted a new thread about the rear hatch alignment problem I have:
https://rennlist.com/forums/928-foru...l#post10644304
I've just posted a new thread about the rear hatch alignment problem I have:
https://rennlist.com/forums/928-foru...l#post10644304
#17
Rennlist Member
Installing rear A/C into a 928 that does not have it is not easy. The most involved part is the replacement of the A/C hard lines in the engine bay. The lines for rear A/C have a Tee at the firewall, and those are almost impossible to remove/install with the engine in the car.
Dan
'91 928GT S/C 475hp/460lb.ft
Dan
'91 928GT S/C 475hp/460lb.ft
Also if you are going to fit new hard feed lines: there are two types of stock Rear feeds that I know of, one has a couplings under the belly pan/floor and the earlier model it's at the bottom of the Firewall.
Dave
#18
Track Day
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I just want to follow up and say that even though it was over 100 degrees yesterday, I was able to switch the blower to a lower setting after cooling off the cabin a bit. HUGE difference after getting the rear hatch to seal better! Now I just have to figure out how to get the hatch to move forward on the car about 4mm.
#19
Burning Brakes
Really difficult.
…snip
I've now got a kit that bolts onto the late 928s which adds an additional condenser and a condenser fan on that condenser.
…snip
This turns out to be a really magnificent addition to these cars. High volume very cold air from the front, a rear A/C that blows very cold air, and reduced radiator temperatures.
…snip
I've now got a kit that bolts onto the late 928s which adds an additional condenser and a condenser fan on that condenser.
…snip
This turns out to be a really magnificent addition to these cars. High volume very cold air from the front, a rear A/C that blows very cold air, and reduced radiator temperatures.
Would it still require the engine to be removed?
#20
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I just want to follow up and say that even though it was over 100 degrees yesterday, I was able to switch the blower to a lower setting after cooling off the cabin a bit. HUGE difference after getting the rear hatch to seal better! Now I just have to figure out how to get the hatch to move forward on the car about 4mm.
GB - interested in your retrofit kit - cost and ease of installation.
#21
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I live in vegas and rarely if ever use mine. I prefer the full cold of a single system blowing on me than the dual setup and a slight lose of cooling in the front associated with it.. save your money and bring your current AC system up to snuff.
#22
Chronic Tool Dropper
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I run mine once in a while to keep oil on all the o-rings and make sure the rear expansion valve hasn't rusted closed. One of those whiles was a couple days ago in 100º+ temps and high (for us) humidity. I'd parked the car in the sun at my dad's house for a couple hours, and needless to say it was a bit warm inside. So I decided to add the rear system capacity and see if it made a difference.
Drum roll... It was barely noticeable. The front was doing it's normal great job on its own, but heat-soaked black car at 100º+ takes a while to cool, even with ~40º vent temps. As I drove, the temp in the car and the center vent temp both dropped, and ten minutes into the drive I shut off the rear system and slowed the front fan. Bottom line is that I'm not convinced the rear system is good for much other than cooling rear seat passengers and cargo.
Drum roll... It was barely noticeable. The front was doing it's normal great job on its own, but heat-soaked black car at 100º+ takes a while to cool, even with ~40º vent temps. As I drove, the temp in the car and the center vent temp both dropped, and ten minutes into the drive I shut off the rear system and slowed the front fan. Bottom line is that I'm not convinced the rear system is good for much other than cooling rear seat passengers and cargo.