Pelican Parts Forums - I make Parallel Flow Micro-Channel Condensers for 911's front and rear

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- - I make Parallel Flow Micro-Channel Condensers for 911's front and rear (http://forums.pelicanparts.com/porsche-911-technical-forum/617196-i-make-parallel-flow-micro-channel-condensers-911s-front-rear.html)

Quote:

Originally Posted by KelogGes (Post 6759205)

Hi Bob,

I have custom designed my own A/C filters I use in relationship to the PF condensers I make; I am not sure what to tell you about A/C FILTER BRAND?

As far as the hi and lo safety cut out switches goes I get mine from a major A/C distributor near me, they are commonly availible; however you would have to also get a filter dryer that has addional connection port fitting for the pressure switches.

The aftermarket hi/lo, "binary" pressure switch is most often installed right at the compressor fittings and to break the compressor clutch circuit as/when needed.

http://www.nostalgicairparts.com/air-conditioning/binary-high-low-safety-switch-male-threads-252.php

The more complete kit.

http://www.nostalgicairparts.com/air-conditioning/binary-switch-w-r-134a-discharge-port-3-16-port-401.php

http://www.ebay.com/itm/Brand-New-Porsche-911-912E-930-A-C-Receiver-Dryer-OEM-/160496625080?pt=Motors_Car_Truck_Parts_Accessories &hash=item255e5825b8&vxp=mtr

Br careful as this filter/dryer comes pressurized to prevent intransit contamination.

Quote:

Originally Posted by KelogGes (Post 6758328)

Short Question but requires long answer <grin>

Very Good and Very Important Question!!! I have waited almost a year for someone to ask about this since designing my A/C Filters! <smile>

I completely agree with your guess, so let’s take this further into a bit more detail

It’s unfortunate most people don’t know or understand about the IMPORTANCE of having a/c system protection filters so I would be happy to inform you.

Your early 911 a/c system has NO FILTERS AND PEOPLE RARELY HAVE THE COMPRESSOR OIL CHANGED, and the compressor is the main moving part of your a/c system and it wears out in the similar ways as your car engine does.

However your car engine has a good liquid oil filter and without this oil filter and regular oil changes and proper maintenance your car engine would not last very long, and it’s the same as you’re a/c compressor. Most people’s cars a/c compressor never get serviced until they stop working then people are forced to spend a lot of money to replace them, except all the newer ones which all now usually have a/c system filters.

First I want to say that every major a/c component manufacturer more than strongly recommends that all a/c systems should have these filters installed to protect the a/c system and there are several reasons why they are needed; FYI ALL THE NEWER A/C SYSTEMS PROBABLY HAVE THEM!

Furthermore I always strongly recommend using 2 special inline filters not just one with my PFC’s. But using only one inline is far better than NONE!
My PFC’s have fairly small holes in the micro-channel tubes compared to older technology condenser tubes

Second Because you probably do not know what is in the refrigeration and A/C TRADES called “A/C BLACK DEATH” and/or “REFRIGERATION BLACK DEATH” IS? You might want to try to Google it, and enlighten yourself to learn about this terrible phenomena that is more than likely in time, going to completely ruin your entire 911 A/C SYSTEM, and when it happens to you the cost to PROPERLY REPAIR IT, it’s GOING TO SHOCK YOU TO SAY THE LEAST! WHEN and if BLACK DEATH happens to you and it more than probably will. Black Death happening to your a/c system does many VERY BAD things to the entire insides of ALL of the refrigerants components the gasses internally pass through in most cases DURING THE phenomena of BLACK DEATH essentially destroying THE COMPONENTS to never again be as efficient as they were again! This basically means they will more than probably never again without replacement be able to achieve the lower temps they use to

A/C SYSTEM BLACK DEATH IS THE WORST THING THAT CAN HAPPEN TO YOUR A/C SYSTEM; you may have smelled a refrigeration system BLACK DEATH in your local markets or convenience stores when food shopping and not known what it was. It has to be the most god awful smell that reeks throughout the store lf the converted gases come out of the refrigeration system into the air, and this smell does not go away easy even after the refideration system has been repaired.

This is just the kind of argumentative statement one might expect from a really sharp, intelligent, 9 YO that is lacking actual life's experience in the venue. The A/C systems you speak of above, "smelled", use ammonia as the refrigerant and that odor results from a LEAK in the system, noting to do with "particulate filters".

Special A/C line filters CAN GREATLY help prevent BLACK DEATH from occurring and/or if it still happens there is a much stronger chance various components can be salvaged and specially cleaned and reused.

NOTE: I have decided I am going to require anyone who ends up buying my condensers at least initially at this time, that they must also install one of my custom made $50 special inline filters (“None Sight Glass”) type, if they want any kind of warranty for compressor or system failure by damage to the compressor; as I am not going to open myself up to getting sued for any metal particles that might be tried to be blamed on my PFC’s.

Furthermore not using proper a/c system filter protection is really stupid and none of the early 911s never had any proper a/c system filters, and its time they did!!

Would you mind naming just ONE passenger vehicle volume manufactuerer that makes use of an A/C "filter" other than the standard filter/dryer that has been in use industry wide since at least the 70's...?

Now back to your question you asked me about “particles from seals/compressor out of the compressor” !!!

Any Particles whatsoever contaminating the refrigerants gas and lubricant can develop into major problems and will be commonly found over time due to increase rapid mechanical wear degrading usually emanating or emulating from inside your compressor if you look carefully doing yearly or by-yearly proactive preventative maintenance with compressor oil change, Then there are the various types of seals either from inside the compressor, or from emanating or emulating from inside and through other various component parts that will more than likely soon lead to system breakdown and NO A/C,
NOT to mention the additional cost of repairs labor and parts all that could been very well avoided for many years by installing special A/C Line System Protection Filters

And your last question; “ but what does it do to pressures? “

Special inline a/c Filters should have no affect on pressures whatsoever !
Unless because there is/was/has been, so much excessive crap and debris within the refrigerants line passage way do to either a component failure and/or about to have a failure; or someone has injected severely contaminated refrigerant; and the filter DID ITS JOB IT WAS DESIGNED TO DO AND WAS COMPLETELY OVERWELMED WITH MASSIVE DEBRIS AND CLOGGED THE FILTER! NOTE: IF THE A/C FILTER/filters becomes completely clogged for any reason you will not have any cold coming OUT OF your air vents at all

Let me say this, if you have unusual pressures and everything seems to be working properly and/or your not sure about anything, the first thing you should always do is suck out the refrigerant and fully inspect the filter and then always clean it and reinstall it, vacuum the a/c system properly reinstall the proper amount of refrigerant and start the a/c system back up again, then re-check the pressures again which should tell you how good your a/c system is now working or not working. You may have just found out your a/c filter just saved you a large headache

This was not in your questions so I will add it,
You also do not have high and low safety cut out switches on your early 911 a/c system, that disconnects your compressor clutch that turns the shaft of your compressor or turns its off for safety reasons if the pressures are too low or too high and I would recommend you add these too to further protect you’re a/c system!

Best regards,

Reid

I couldn't agree more about your last recommendation, adding a hi/lo pressure switch. If you live in the deep south you might also consider wiring the new switch so it will pickup the front blower relay should the A/C pressure rise above the high limit once the engine is shut down.

No good reason, solid or otherwise, foundation for the above suggestion except I have long suspected that a pressure rise, EXTREME rise, in the rear deck lid condensor temperature caused by rising engine heat and HIGH OAT is resulting in enough pressure to temporarily overcome the hose o-ring seals.

That would explain the need to recharge the refrigernat every 2 years or so.

It has never made good sense to me that Porsche would have continued the use of improper "non-barrier" hoses for so many years if that was what the problem was/is.

Obviously replacing the "non-barrier" hoses would also require the use of new o-rings....

Never heard of AC filters. No aftermarket co dealing with 911 (Griffiths, rennaire, retroaire) says you need this. unless you mean the drier.

I got my Hi-Lo from Griffiths. Very nice piece. Includes the hose so its all one assembly.

$160.00
Compressor to Condenser - Stock, Switch
Stock configuration hose. Compressor to Engine Deck Lid Condenser with high/low pressure switch. Fits 1970-1983 cars with OEM "stock" type... 91157315002S

Porsche, 911, 1970-1983, barirer hoses, 91157315002

Quote:

Originally Posted by 911 tweaks (Post 6758509)

what brand do you recommend and/or where can we get the a/c line filters & a/c hi and lo safety cut out switches...??
Thx, Bob

Caution, HEADS UP...!!

"Some people can read the contents on a chewing gum wrapper and discover the secrets of the universe...others...."

Anyone still putting any faith in this Reid guy needs to read the material he has referred us to.

What is Black Death?

A/C BLACK DEATH refers to a common failure mode of a specific model/type of A/C compressor, FX15 specifically. Apparently the teflon within the compressor wears off as a fine dust, maybe even at the molecular level, mixes with the HOT compressor oil and refrigernat and forms a black gue that blocks, ENTIRELY blocks refrigerant flow.

Adding filters to these systems was unsuccessfull as the black "gue" simply blocked the filters. Tha final solution was to replace ALL system components with the exception of the evaporator itself.

Sorry Reid. I am going to respectfully disagree... I called my Honda dealer for my 2012 Accord, and my VW dealer for my 2010 Passat and asked them if the AC filter/drier is on the recommended maintenance list for ANY car they service at ANY mileage and they said NO. Unless they open the system, or there are AC issues that they are servicing, its never changed, cleaned or serviced. The only filter they manufacturer is also known as the drier. They claimed to not make any other filter. Does this replace the drier and if Honda and VW would never change this even on new cars, why would we need to? Please clarify your position.

Quote:

Originally Posted by KelogGes (Post 6758328)

It’s unfortunate most people don’t know or understand about the IMPORTANCE of having a/c system protection filters so I would be happy to inform you.

Your early 911 a/c system has NO FILTERS AND PEOPLE RARELY HAVE THE COMPRESSOR OIL CHANGED, and the compressor is the main moving part of your a/c system and it wears out in the similar ways as your car engine does.

First I want to say that every major a/c component manufacturer more than strongly recommends that all a/c systems should have these filters installed to protect the a/c system and there are several reasons why they are needed; FYI ALL THE NEWER A/C SYSTEMS PROBABLY HAVE THEM!

Special A/C line filters CAN GREATLY help prevent BLACK DEATH from occurring and/or if it still happens there is a much stronger chance various components can be salvaged and specially cleaned and reused.

Furthermore not using proper a/c system filter protection is really stupid and none of the early 911s never had any proper a/c system filters, and its time they did!!

I agree with wwest. Im calling BS on this one.

Stick to developing more efficient condensers and a better mousetrap. If Griffith and Rennaire dont sell a filter.. after all their sucess and years in the business... then its not needed... period. if this is just another drier with a built in filtration system, then say so. dont give us smoke and mirrors. it will ruin all your credibility.

Quote:

Originally Posted by wwest (Post 6759651)

[B]What is Black Death?

A/C BLACK DEATH refers to a common failure mode of a specific model/type of A/C compressor, FX15 specifically. Apparently the teflon within the compressor wears off as a fine dust, maybe even at the molecular level, mixes with the HOT compressor oil and refrigernat and forms a black gue that blocks, ENTIRELY blocks refrigerant flow.
Adding filters to these systems was unsuccessfull as the black "gue" simply blocked the filters. Tha final solution was to replace ALL system components with the exception of the evaporator itself.

Quote:

Originally Posted by brads911sc (Post 6759666)

Please clarify your position.

I think his position is to sell something. Most probably something that has no observable function other than some sort of placebo effect for the purchaser.

My 21-year-old Audi has no filter. It still cranks the 35-degree air on a hot day. As far as I know, the system has never been open - I have all the records from new, including the window sticker. Unless some AC service was omitted from the records, the car still has its original R12 charge. While I find this to be surprising, I do not think it's impossible. My S6 has its original R134a charge.

Now, Audi in not well-known for generating stunning low temps in the cabin with its AC, but vent temps below 40 degrees with the highest fan speed in 100+ degree OAT is "good enough". How is it possible that these compressors are still running, if they needed their oil changed and/or filtered?

I remain unconvinced that Reid has built the better mousetrap here. Creating buzz for a super-awesome product while throwing in some useful info every now and again is a marketing strategy that has been successful for many folks. I think the better plan for decent AC in a car never really designed for good AC is to call up Griffiths and talk to Charley. Vaporware and talking a good game is all part of the internet experience, but I prefer reality. :)

I bought most of my system from Griff. Great stuff.

Quote:

Originally Posted by SilberUrS6 (Post 6759700)

I think the better plan for decent AC in a car never really designed for good AC is to call up Griffiths and talk to Charley. :)

Quote:

Originally Posted by brads911sc (Post 6759712)

I bought my system from Griff. Great stuff.

I agree. Excellent customer service, under-promised and over-delivered. Not only that, I have 100% confidence that Griff will stand completely behind his product. I do not get the same vibe from Reid, but if and when he ever does sell product, I guess we'll all find out.

I think his filter idea is a complete dud, and I'm not certain that the parallel-flow condenser is going to be such an improvement from the serpentine stuff available as to justify the money spent. Without independent testing data comparing the two, touting PFC as "better" is just a matter of opinion. And even if it is "better" as confirmed by independent testing, what is the longevity of the parts? And if they fail three years down the line, what will the response be? One of the great things about Porsche is the fact that the cars are damn reliable if you treat them to regular maintenance. AC is a mature technology, and has become ubiquitous due to how reliable it is. Adding question marks in search of one degree improvement in vent temp seems counterintuitive.

I agree... for me, its not about vent temps. As i said in one of my first posts in this thread.. any monkey can get 35-37 degree vent temps at 82 degree ambient temps. Can you do that at 95 degrees is another matter. I havent seen it yet in his test data. I am willing to cut him some slack on this point because it is just now hitting 90 in south florida. testing in mid june will tell the story.

Also i think that for me, spending thousands, when i already spent thousands on Griff and ZIMS, and have 37 degree temps, is not in the cards, unless it lowered my engine temps by 20-30 degrees at 92 degree ambients. I think the better mousetrap would be a system that could obtain the same vent temps, while lowering engine temps to 8 o'clock from above 9 o'clock on a 95 degree day. that is the one weakness remaining on these systems regardless of which one you choose.

That is why i keep suggesting that he focus on a new front fender condenser that along with a ZIMS or Griffs style rear condenser could complete delete the deck lid unit.

A well designed kit with hoses, fittings and fans would have a market in the deep south. I run all day long at 8 o'clock at 92 degree ambients. until I turn on my AC and it raises to just over 9 o'clock. that is a real downer after spending all this money on cold AC.

if you arent going to lower engine temps, then there really is no point since Griff and Rennaire have been there, done that with vent temps and their systems are high quality, service is excellent and for anyone who has it, there is just no point in changing.

Quote:

Originally Posted by SilberUrS6 (Post 6759744)

I think his filter idea is a complete dud, and I'm not certain that the parallel-flow condenser is going to be such an improvement from the serpentine stuff available as to justify the money spent. Without independent testing data comparing the two, touting PFC as "better" is just a matter of opinion. And even if it is "better" as confirmed by independent testing, what is the longevity of the parts? And if they fail three years down the line, what will the response be? One of the great things about Porsche is the fact that the cars are damn reliable if you treat them to regular maintenance. AC is a mature technology, and has become ubiquitous due to how reliable it is. Adding question marks in search of one degree improvement in vent temp seems counterintuitive.

Quote:

Originally Posted by brads911sc (Post 6759754)

if you arent going to lower engine temps, then there really is no point since Griff and Rennaire have been there, done that with vent temps and their systems are high quality, service is excellent and for anyone who has it, there is just no point in changing.

You've hit it right on the head.

And those lower engine temps have to be with a bolt-on, reliable system. If you have to fab or cut or otherwise modify your car to make the stuff fit, it's going to be less attractive. Oh, yeah - it's also going to have to be price-competetive. I might spend some money for lower under-deck temps, but I'm not going to drop stacks of benjamins for 20 degrees of oil temp reduction three days a year.

Yes. in houston we are at 92 from Mid May through Late September. So Id get more 3 days a year. :) But your points are really the bottom line on sales vs no sales... AC is not a critical component (like horsepower) where you will spend thousands for little to no gain just because it looks awesome...

Quote:

Originally Posted by SilberUrS6 (Post 6759797)

Reid, quite possibly or inadvertently, has done me, us(?) a favor.

I googled A/C black death as he requested.

The issue of thermostatic fan clutches and/or electric radiator cooling fans kept coming up.

So with a little more Googling I discovered a few instances wherein the failure of fan clutches or electric cooling fans resulted in refrigerant loss due to over-pressure, apparently well beyond 300PSI, within the condensor.

So my theory of refrigerant loss due to condensor heating, pressure RISE, from engine heat may well be valid. So rather than replace those non-barrier hoses a better plan might be to have those 2 CHEAP China made fans run automatically, continue running, if/when the hi/lo switch indicates a HIGH condition, even with the ignition off.

Quote:

Originally Posted by wwest (Post 6760355)

So my theory of refrigerant loss due to condensor heating, pressure RISE, from engine heat may well be valid. So rather than replace those non-barrier hoses a better plan might be to have those 2 CHEAP China made fans run automatically, continue running, if/when the hi/lo switch indicates a HIGH condition, even with the ignition off.

That actually sounds like a great plan and food for thought while my car is unbuttoned.
I live in the San Fernando Valley where dry heat reaches 105-110 during the hottest Summer days.

If you are running a high low switch wouldn't your pressure start to decrease almost immediately if it was tripped? and wouldn't the switch shut you down long before you reach that point? on the griff hi-low its right on the compressor. It would get tripped before the pressure would hit the deck condenser. Aren't most made that way?
I have a ZIMS fender condenser.. I do like the idea of that one continuing the run if the switch was tripped.

Quote:

Originally Posted by wwest (Post 6760355)

Quote:

Originally Posted by brads911sc (Post 6760792)

The subject matter has more to do with what happens AFTER the ignition is switched off and with the rear lid condensor pressure already above the high compressor pressure switch off point.

No engine fan to move the engine heat downward rather than upward....

If it so happens that the evaporator vane temperatures already have been reduced to ~32F there will be almost no flow through the expansion valve to help alleviate the rising system pressure.

Excuse me but You guys really crack me up sometimes and put me in an amusing mood so take no offense, my thinking is on another plain/planet then yours, I am not really interested in selling A/C accessories, at least not at any time soon!!!

The custom A/C filters I designed and make are primarily for MY PFC customers only and are primarily for the purpose of PFC warranty issues I have no intension of selling them separately at least not anytime soon!

Some of the posts I read here are amusing to me sometimes in that most of you guys have no idea of what my background is and what I really normally do for a earn a living; Its sure normally not anything to do with A/C parts for old 911s. (smile)

Because you dont really know me You might want to think about this when I say something here & that I occasionally might kind of know what I am talking about (smile) but I would also be the first to say I for sure don’t know everything and am consistently learning!
FYI; When I was very young I was a full service journeyman level auto mechanic that in addition included their a/c systems, probably before most of you were born, when I worked for my father for many years and in school, then I became a professional marine mechanical engineer and for the last 30 years have worked on some of the finest and largest and most expensive motor yachts in the world, that are owned by billionaires where cost is no object. Besides the hundreds of types of mechanical, electrical etc etc etc Motor Yacht Systems I work on, I also work sometimes on their $250K-$350K computer controlled multistacked A/C Systems, so I think I KNOW HOW TO MAKE COLD A/C AIR <grin> oh btw I have worked on and done most of the work my 75 911 for over 20 years and fortunate and very lucky to have long time friends who happen to own one of the best and most respected Porsche full service repair shops in south Florida; who arekind enough to allow me into their shop to use anything in their shop for anything I need or want to do.

Regardless you might say I know a thing or 2 about 911 Porsche A/C systems (smile) they are actually rather simple for anyone with a/c knowledge and experience.

My current interest has expanded to an ARRAY of State of the Art Technology PFC’s but have not released any info about this yet

BTW; I answered a technical question someone asked me and expanded on it because the person seemed to have limited A/C system knowledge to help them or anyone else reading learn something, what I said went right over some of your heads!

You can disagree all you want and apparently you also totally miss the point I was making, after reading your conversations makes me smile

Regarding a/c separate system filters I guess some of you know better than i.e. GM, Ford etc etc, and all the major A/C component manufacturing companies that include compressors, condensers & evaporators, AND A/C “SYSTEM FILTERS”, and THEIR STRONG RECOMMENDATIONS FOR ADDITION OFTHESE KINDS OF “SPECIAL SEPARATE SYSTEM FILTERS” (smile)

I think you need to do a bit of reading/learning; your local car repair or parts shop is not a Manufacturing Engineering company & does not manufacture and warrant anything themselves because they do not make or manufacture anything; but you consider them as your ultimate source to know everything <grin>

NOTE: the a/c “filter dryer” being talked about here by others as opposed to what I was talking about AN> “a/c system filter”! IT’s something completely different!

BTW Have you ever cut in half a filter dryer METAL canister and looked and seen this limited low quality filter inside??? I HAVE, MANY!

A filter dryer canister is not a low side and high side system filter, it’s a “DRYER with partial filtering in it” furthermore it is normally connected just before the evaporator and a filter dryer only has limited filter effects

Try thinking of this; any debris that comes out of the compressor on the high pressure side next goes directly INTO the condenser “WITHOUT ANY PARTICLE FILTERING WHATSOEVER” and furthermore my PFC's have "very small micro-channel passageways" and not the far larger diameter OEM plate & fin tubes OR serpentine tubes that are fed directly first from the high side of the compressor, think about this!

Gee what happens when the compressor throws out metal, or implodes spewing out phosgene and other very extremely nasty black death compounds and particles entering the condenser first?

GEE you just damaged your condensers first because there was no filter from the high side of the compressor,

its OK they are cheap just get new ones

next downstream comes the dryer that people like to call a filter dryer that has limited filtering capabilty <smile> its now trash get a new one and dont forget to also get new hi and low side pressure sensers their toast now too

next downstream comes the evap and thermal expansion valve gee nasty stuff just entered the evap and came out the other side ahhh ohh get a new evap and thermal expansion valve

next down stream comes the compressor lowside inlet filter/dryer was not so good
gee compressor damaged beyond repair gee geet a new one

and as 'THE BLACK DEATH" ALSO Went through all the hoses be smart and not use them because if you do the will contaminate all the new parts you just replace and you will have just wasted your money having to do the job again

Anyway I will let you guys have fun talking between yourselves about filter dryers, system filters and hi/low pressure switches, I have said enough and have other things to do

Almost ready for pelican business

Although I have not as yet listed my PFC’s at Pelican yet, I plan to contact them regarding them listing them for sale here because I am about to expand production and its time I open the dialog with Pelican regarding this as I have decided they would make a good distribution point for one of my distributors.

I actually finally have my PFC’s to the state where they are now easy for me to make available to the public in very limited quantities of only a few at a time; and I will be contacting Pelican shortly to see how we can work this out for limited distribution. I am not in a hurry about this because I have several interested 911 owners near me that want them, (read below).

MY Research, Development & Testing for my front, and the rear contour PFC’s was finished early last year.

MY Intentional holdup for making my PFC’s more available and me putting many interested people on hold, had to do only with working out some special aluminum welding issues that I now have finally completely resolved !

Last year I read several posts in this thread from people wanting to see more independent install tests besides my own and I decided this was a good idea; so I had several 911 owners local to me that were interested in installing my PFC's contact Stokes Automotive a well known and respected Porsche repair shop here in Ft. Laud do their installations.

So far now there have been 2 installs completely independent of me done by Jason the owner of Stokes Automotive & I have posted the results here;

These addition 911 owners I have are in line to bring their 911’s into Stokes Automotive and the installations and related work and the report with pictures will be posted here when the owners and Stokes Automotive work out their scheduling issues, which unfortunately seems to keep changing, so I do not know yet when they are bringing in the cars; but it’s getting hotter here in south Florida so I only know it should be very soon (smile)

On another note; Jason the owner of Stokes Automotive told me he was very impressed with the 2 different installations he did with my PFC’s and he has told me he has NOW become a believer in my PFC’s and will also recommend them to his many long time customers, so apparently from what he told me there is going to be additional 911 PFC installations also that I will post here related to his customers that are not mine.

NOTES:

I do not work for Stokes Automotive!!! I am completely independent from them!

On another note last year I had SEVERAL people contact me here regarding PFC prices and that were privately given a special price; ONLY for those that had inquired before a certain date and I remember who they are, this time window has now been long gone but I may still try to give these people the same price I told them and include shipping in the price. I will have to discuss this with Pelican when I talk to them shortly about listing my products for sale here as I have no intension of cheating them and I have made no sales that originated from here yet.

Btw I have ONE SPECIAL GUY, who is a 911 owner that reads this thread from Iraq & I want to do something special to make his 911 cold lf he contacts me again.

Quote:

Originally Posted by KelogGes (Post 6761461)

I am not really interested in selling A/C accessories, at least not at any time soon!!! ...

... I plan to contact them regarding them listing them for sale here ...

LOL, just LOL.

It begins to look to me as if this issue of a separate A/C filter might be an attempt to solve a problem of YOUR OWN MAKING. A problem that doesn't exist unless you need to flow refrigerant through the TINY passages in your new condensors.

Okay, I'll be 72 in July, my first air conditioned car was a 1968 Ford station wagon. I tend to drive my cars/trucks into infinity so I don't have a lot of personal experience with A/C. But the experience I do have would indicate that your A/C filter is a solution in need of a problem.

I have had, owned, a few air-cooled 911's still have a '78 and an '88, and the only A/C "problem" I have had with any of them, other than cooling capacity, is the known issue of disappearing refrigerant. Unless you count conversion to R134a.