I live in Texas with a Black/Black GT. Over 100 from July to Sept. Also own both a new dark Audi and Ford truck. My properly running 928 A/C vent temps will cool down faster then either of the two "new" R134 systems. This verified by a laser temp gun. After maybe 10 to 15 minutes of open road driving each system will have about the same vent temp and will begin to overtake the rays from outside. In stop and go traffic they all tend warm up a bit.....no duh.

There is nothing "wrong" with the 928 A/C system. It has all the same components as everything else out there. It is not "undersized" by any means....in fact the blower motor on speed 4 will beat the crap out of the other two. Maybe Florida is different, but I wouldn't knock the 928 system as being
not capable.

 

I live in Texas with a Black/Black GT. Over 100 from July to Sept. Also own both a new dark Audi and Ford truck. My properly running 928 A/C vent temps will cool down faster then either of the two "new" R134 systems. This verified by a laser temp gun. After maybe 10 to 15 minutes of open road driving each system will have about the same vent temp and will begin to overtake the rays from outside. In stop and go traffic they all tend warm up a bit.....no duh.

There is nothing "wrong" with the 928 A/C system. It has all the same components as everything else out there. It is not "undersized" by any means....in fact the blower motor on speed 4 will beat the crap out of the other two. Maybe Florida is different, but I wouldn't knock the 928 system as being
not capable.

 

OK, I will do it right to start with and see if I am happy. I don't get +100 here very often and I do need heat in winter. The link to Nichols site gave me just what I needed to feel comfortable digging in.

It has been interesting reading the discussion of whether the AC is sufficient to handle the problem. I even have the supplemental unit, so really should be ok.

Thanks for the help.

 

I am not sure what the big deal is with Miami, I drive my car everyday in Miami and my ac cools just fine. And I don't even have a rear evaporator. I get cold having the fan higher then two after the initial cool down phase. If your system works right, the heater valve closes and the recirc flap shuts, it cools great. I don't think it is flawed.
cheers,
Sab.

 

I bought and drove my everything black S4 in the Maimi/Ft. Lauderdale area in August. Center vent temperatures were typically right around 37-38 degrees, and occasionally dropping down to 34 degrees. That was with no modifications from the way Porsche built the climate control. My car doesn't have the rear A/C option either.

 

If you are really getting 34 degrees at the vent, well that's better then a brand new Porsche.

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Weissach:
<strong>If you are really getting 34 degrees at the vent, well that's better then a brand new Porsche.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">It wouldn't surprise me. My 928 still has R-12, where new Porsches don't. My R-134 Toyota doesn't get as cold as the 928 does either. On the 928, getting the fog out of the vents is typical. With the A/C cranked up all the way, I've gotten enough condensation building up on the windshield at times that I needed to turn on the windshield wipers to see well enough drive.

 

That's actually the most anoying problem the moisture buildup on the outside of the windshield. I wish I could turn off the air coming to the vents in the dash.
regards,
Sab

 

my 82 had a bad vacuum motor controlling the the flapper (inside air or outside air(behind glove box))
i ordered one for 928 international but alass was the new version(apparently the no longer make the older style)i thought also about wiring it shut for total recirculation but was able to modify the new one by using the old housing and the new cup by shiming it with washers..... anyway here in arizona its 110 today and my a/c which is converted over tho 134a blows 35 degress..... i agree that "rigging" things so that they may work for you is in no way fixing them...please fix em right... when these cars do become very collectable the prices for fixin em right will cost way more than they do now and a molested car wont be worth nutten

 

Well, I've got no qualms about going not stock. A PO bastardized it with a GTS bummpers that I dislike. There is also a Sony Xplode radio that I'm not fond of. I had the sorry looking rear spoiler removed, let the last PO keep it. I'm working on figureing out a way to remove the "GTS" lettering off the bummper, and buying a set of phone dials. I turned most of the "features" of the radio off.

The a/c didn't work at all when I bought it. I traced the problem to a leaking cruise control unit and/or vacume tank, bad sensors, and a lack of freon. Since the curise control doesn't work anyways, I cut it out of the system, for now. I added some cheap Freeze 12. I know not recomended, but hay, it works well enough. I replaced the outdoor sensor, and am working on rapairing the indoor sensor. I deal with 100 or so degree heat temps, with massive humidity, too. The a/c sucks out the heat, no problem, and sucks out the humidity too! The 928's a/c isn't bad, thats for sure. Just check the size of the condenser! It's huge. It's about the same size as the radator, bigger than most any other car I've played with.

I don't see how the 928's a/c system is rather heavly flawed. Every car I know of has a vacume controled a/c system. They're all succeptable to vacume leaks. There might be a few with electric controled systems, but again, anyone want more electrical problems?

All in all, to get my a/c working right again, I spent under 100 bucks. And most of it was on the Freeze 12, and it's parafanelia. If I have to add more freon, I'm converting over to R-143a, little cheaper freon, and easyer to get my hands on.

 

I don't mean vacuum leaks. Sorry for the mix-up. What I meant is air leaks. Even if the vacuum system is perfect, the flaps through out the system don't seal %100 shut. They close about %80-90 each, but not all the way. Even if you force the flaps to the closed position by hand, they still leak some air!! This IS a very big flaw, because all those little leaks add up big time.

Have you guys noticed that the AC system on 928 doesn't "blow" as hard as other cars. It's not the fan, it's actually very powerful. It's all those air leaks built into the system.