That is a terrible build standard, then, as 52-54 degree vent temps in 95+ ambient is woefully inadequate; overall weak cooling performance, very slow to recover from heat soak (if at all), and requires the system to be continuously run at max to even squeak out a little bit of cooled and dehumidified air. I wonder who the brainiac was that thought such a low bar was appropriate?

Thanks Tippy that's really a good questions!


I stay out of the treads due to the insanity and hoppla that ruins it for everyone especially those seeking help! I just stay in my own.

I will really have to think about this? I have not given price much thought yet

What do you think of an initial price, $500 tag price that includes the 950 CFM Blower?
If it does what I think it will do its worth a lot more;

The problem with price is Pelican Our host wants their cut and they deserve it so this will drive price higher.
Griffiths charges for what he has a lot more I believe. But he is good for what he does with the technology he uses.

THIS PFC CAN BE THE EASIEST A/C DIY FOR THE NOVICE I think!

This puppy only weights a couple of pounds including the blower.

A DIYer can use thin pieces of sheet metal strips drill holes in the brackets/strips and bend them by hand forming to fit, in only 3 places. There are mounting brackets on both sides of PFC to allow it to be mounded very easy. They can by cheap sheers to cut the aluminum from HarborFreight LoL.They can also use Pop Rivets in some places inside the left rear drivers side fender well

I will not know until its tested and I get some numbers if it will run alone. But I am confident it will.

If that is the case it’s only going to need a few feet of #6 A/C reduced barrier hose (the smallest and diameter lightest and cheapest size), I am assuming that people have a good evaporator back to the compressor hose from the smugglers box

Its going to be more difficult to remove the old factor A/C parts no longer needed then it is to install this PFC into a 911 fender well body cavity I think for a novice DIY'er.


SOME Owners are using 3 condensers I think it ludicrous! My matched set PFC’s get extremely low temps using only 2.
But where talking about a different animal

However they can just disconnect their old hoses no longer needed and make their own New hoses DIY.

The new hose length that's going to be needed goes from the engine compressor high pressure side in the engine compartment to the left side of fender wheal well; depending on how its routed (3 or 4 feet??) to the PFC INLET fitting. The out let fitting goes to under the 911 to the Evaporator in the front smugglers box TXV Valve after going to a filter dryer ; whatever is shorter


Believe it or dont all high pressure hose reduced barrier hoses can be #6 except for the hose you already have that goes from evaporator and back to the compressor low side inlet. I think its #10 its bigger because its brings back low pressure expanding gas refrigerant.

I'll let the others weigh in who have actually went aftermarket for their AC needs to chime in, but I think your price seems acceptable.

Could This PFC BE The Holy Grail For Early Model 911 A/C System
 

Price is not the issue.
The vent temperatures could be an issue.

The big issues are a lot of DIY involved in this “kit” and the current Porsche trend is to keep it stock.

An original looking complete AC system that keeps you cool while enjoying your classic is something people will purchase.

A single part that requires “Harbor Freight LoL” fabrication, a lot of DYI hoses and brackets and only produces 40* vent temps. There may be 10 buyers on the planet.

So your dream system needs a lot more work and effort.


Sent from my iPhone while Driving

I don't know what it is, but I vaguely remember my parents old 84 Dodge Ram did around 40 degrees, possibly less. They kept a thermometer in the vent.

Thanks But I want a Verified A/C Air Vent Temp on a 2018 PORSCHE 911 Carrera OR SIMILAR 911 MODEL WITH FACTORY A/C

I THINK YOU'RE GOING TO BE SURPRISED

First time responder.......
 

Reid,

I have been following your saga about this holy grail AC stuff you have been professing and found it interesting to read. I know nothing about AC and want to have my ‘89 cabriolet’s blow cooler air in the summertime. It sounds very strange that you have to ask people for critical data point you need for your work. Do your homework or your work with test results and information and not rely on deserving volunteer (DIYer’s) hearsay data.

If it true that you have a break through technology, why are you having such a difficult time getting people on the bandwagon? Have you actually done an AC installation in a 911 using your discovery that produced this remarkable ice cold temperature? I hope you did if not, this is a problem (?). What is all about being a reputable DIYer to be chosen for your test? Why can you do the test yourself and prove them wrong? Please advise. Thanks.

Tony

I would suggest you go to the Rennlist 991 Forum and ask someone in a hot climate that owns one, but what does "Verified" mean?

Couldn’t you just go to your closest Porsche dealership and ask them to let you check?

How is 52 degree vent temp going to cool down (in less than an hour) a 911 in 95 degree weather that probably has 130+ interior temp when parked. There’s a huge amount of solar energy coming through the glass and a dark interior will soak it up faster than 52 degrees will cool it down.

THIS is supposed to be a 911 technical forum of questions and answers

I asked a very simple question for someone who knows or will go find out themselves; yes I know I can call a Porsche Dealer for the answer, but I want the answer to come from one of you and you post the verified vent temp number here for a new 2018 Porsche 911

Here's a chart for a 993 Carrera AC system which seems to be an adequate system, note the vent temps in the 90-100 deg range.
The biggest improvement in the later AC systems is the huge difference
in the amount of air flow/air exchange rate versus the early 911s'
anemic blower air flow. Just my $.02
http://forums.pelicanparts.com/uploa...1517935922.jpg

I would not be surprised if the a/c was insufficient in 95 ambient and would need to be modified to work well in a hot climate.

As a loosely comparable data point, I have a friend that is a shop foreman at Lamborghini Dallas and he says that the modern a/c on an Aventador and a Huracan is too weak for Texas heat, so owners who want to drive them around here immediately have the systems modified (bigger/more condensers) for greater performance.

Of course, if all manufactures design their systems to only the 52-54 @95+ range, then they all would need modification to work well in hot climates.

It is, but the last 911 was built in 1989 and you are asking about a 991's attributes.. Those guys don't really hang here, but they are en mass at the link I gave you.

Yes thanks. We have data for modern 911s and a bunch of other new cars too.

I would also imagine that quantity of the air is a big factor as well, if you supplied a massive amount of 60 degree F air to the cabin, it would cool down just fine, correct?

...as uwanna points out, the vent temperature is only a small part of the story. An AC system is a heat exchanger and the cabin medium is air.

The cooling efficiency greatly depends on the amount of air recirculated through the cabin. Modern cars have very powerful blowers and exchange a lot of air, hence the vent temperatures are higher. They can also 'place' the air better to make a cold 'curtain' around the occupants.

This is the primary reason we designed a new blower for the 911. Not only does it move more air but it can output cold air to all seven factory outlets in the car in any combination.

We conducted climate chamber testing of our protoype system (prior to blower upgrade) at 112F. The results are in 'ElectroCooler Protoype Test report PDF' on this page:

Air Conditioning for Classic 911 - Classic Retrofit

Good points about cabin air flow and volume, but based on my experience, vent temps are not a small part of the story - the lower the better (without freezing the evaporator core outright) increases the dehumidification effect and allows one to not have to create a hurricane of wind and fan noise in the cabin, and a system capable of delivering extremely low vent temperatures recovers quickly from heat soak. Of course, all of that is dependent on one's personal preferences regarding comfort (cabin temp, humidity level, noise, etc.).

And just for the sake of friendly **** slinging, the vent temp 'v' airflow discussions always remind me of Enzo Ferrari's comment about engines 'v' aerodynamics - aerodynamics are the concern of those that don't know how to build engines. :D