This may be too basic.
Do I have this single line diagram for a Carrera 84-89 correct?
During discussions it might be handy to refer to this for temperatures, pressures, gas or liquid states. I also hear of e.g. over pressure switch, where does that go? This is rev. 1, I can edit for corrections or more detail.



http://forums.pelicanparts.com/uploa...1311522435.jpg

You want/need one or more of these to protect your A/C
 

YOU WANT/NEED ONE OR MORE OF THESE TO PROTECT YOUR A/C http://forums.pelicanparts.com/uploa...1311521860.gif

I bet you don't have an A/C filter protecting your compressor, condenser, your evaporator etc to save you from a really big future headache

I am going to make this an option component for my condensors for several reasons; the most important being that PFC micro-channel tubes if clogged by any foreign particals semt to them in high pressure gas line coming from the compressor

This cleanable filter is unique it has a small sight view window that lets you quickly determine any debri it filters and catches and should last the life of you car

This thread is cool :)

Should I ever find the right sc I will buy one!

[QUOTE=hcoles;6154785]This may be too basic.
Do I have this single line diagram for a Carrera 84-89 correct?
During discussions it might be handy to refer to this for temperatures, pressures, gas or liquid states. I also hear of e.g. over pressure switch, where does that go? This is rev. 1, I can edit for corrections or more detail.



[Not bad for a start

CALL ME 954-599-5235 I am in Ft. Lauderdale so we are both looking at your diagram at the same time and we can do this fairly quickly
you have a couple of things that are not correct for 911 Porsches in your diagrams and trying to make the needed corrections with multiple posts would clog up the tread (smile)

fyi for any needed usable pressures and pressure drops for either the low side or high side there are no connections on any of the individual A/C components except only the normal high and lowside connections on or near the compressor, therefore without these/this non existent component hose fitting connections on each component for pressures both in and out, this makes it basically impossible to discuss in layman’s or in scientific terms refrigeration aspects other then what the a/c system high side and low side normal connections provide for only a general overall diagnostics discussion

personally I am very interested in these things and when I get some time I will probably remake a full set of modified components for extreme analytical analysis and design modification, but I will never make this information public or discuss it with anyone due to legal concerns until after I am granted the patents


Reid

[QUOTE=KelogGes;6154989] I'm just trying to layout what the stock design is and how it works, I don't think we consider this type of info. proprietary on this forum.

Please use my diagram and mark over the top or describe sending to PM hc.coles@gmail.com so we don't clog up the thread until a more accurate diagram can be posted. Others are invited to comment on my diagram of the stock design. I'm sorry I can't understand your middle paragraph.

KeloGes, very interesting! I recently purchased a 87 911 cab, black on black. I live in north Texas so I appreciate your desire for cool air. I'm currently "fixing" all the items of immediate concer, AC compressor is removed for repair or replacement. The car AC system is stock, obvious I'm looking to upgrade. Please keep me updated with work. Hangar21@me.com. It's great to see that someone wants to buid it BETTER! While I'm good mechanical things, I'm not good with this iPad. Can someone help me subscribe to this link! Thanks Terry

Brain Fart, since it is hybrid of sorts, can you rig up a helper spring to swing the arm back into postion? That is what my 3.2 Omega ring does. Just a thought.

Hangar21, once you've made a post you're automatically signed up to receive all future posts to this thread. You can thank our host Wayne for setting that up. Now if you want to join in and read along with a thread with out "subscribing or bump" then all you have to do is go to the top of the page and drag down from the tool bar, "Thread Tools" and click on SUBSCRIBE. From then on you're automatically signed up to receive all future posts to that thread or until you UNSUBSCRIBE.

Mitch, thanks-I,m subscribed. My 87 has a wide body " turbo look" similar to yours. Looks great! I'm in Keller ( north of ft. Worth ). This thread sounds very interesting? How's your A/C working? Made any changes? Again, thanks for the help. Terry

Terry,

I love my Turbo Look... The A/C is doing well, I just added Griffith's front condenser and upgraded from Rennaire's evaporator to Griffith's evaporator. Griffith's evaporator is thicker and has more serpentine tubes. I'm always looking for that edge when it comes to our Texas summers. I had some other issues that Griff worked through with me, the guy really hangs in there with his customers.

Stop in some time for a Shiner. We didn't mean to Hi-Jack this thread...

improvement design change on my deck lid rear contour PFC condenser
 

FYI

I have made an improvement design change on my deck lid rear contour condenser to the high side hose connection placement and type of the fitting; after I successfully tested my latest rear contoured PFC early last week

I have been talking with Cab the owner of RennAir after they read what I am doing here and they contacted me and informed me they are interested in my condensers; and also he wants them for a special client of theirs. I should be able to send them a front and rear matched pair of samples for testing tomorrow Monday if all goes as planned.

RennAir was really helpful to me in sending me one of their 911 Serpentine Evaporators and helping me get it dialed in, which allowed me to complete my rear deck lid contour testing, when I got bogged down and got greatly delayed with a custom made evaporator I made that would fit inside the plastic 911 smugglers box in my car; I had been experimenting with.

I am confident RennAir’s testing should go very well; my testing sure has for me.
It should be very interesting learning their test results. I am very curious of their test numbers especially because their installation will include both their evaporator AS WELL AS THEIR PROCOOLER as well as both my condensers. I am pretty sure their numbers will be in the low 30s time will tell and we will know this next week.

STAY TUNED I think somebody is going to have a very cold 911 IN TEXAS <grin>

[QUOTE=hcoles;6155205] I GUESS YOU MISSED THE FIRST FEW WORDS OF MY FIRST PARAGRAPH I WROTE YOU???

The question I have is if the diagram that hcoles posted is accurate for the standard A/C on a 84-89 air cooled 911? I think it would be good to have an accurate diagram of the stock system when we are talking about how it can be improved if at all.

The micro condensers seem an interesting possibility!

I'd say both of the diagrams are accurate for a typical TEV system, however you could delete the "TAP'S" or move them over to the compressor manifolds and note them as 'service ports'.

KeloGes,

Several of us are interested in your product and new design but a question or three.

I have an 1985 Targa that has been backdated to look like a 1973 RS. Also has a 3.6 in the back.

The car has factory air but its 25 year old vintage. Like the idea of using your new design front condensor but really do not want to use the condensor on the engine lid that puts more hot air in the engine. As well would rather move weight forwards, not aft.

Do you have a condensor that would fit in the front LH wheel-well like the 993 design? Was thinking that this combined with the stock nose condensor would be enough to cool the air if they were of the new design. Would build a shroud over it and put a flat fan on the unit to get air through the unit.

Thx,

Joe A
Phoenix

Doesn't node "E" goes on the bottom of the receiver and node "F" goes at the top.... That is why you see the ball floating.

I will also say the node "A and B" and "C and D" are the same nodes.... If used as reference, this is more accurate for a piping/process diagram.

im gonna chime in here as joe and i are amigos and live 10min from one another and we are in to up fixin our a/c systems. this is what i want to do with my 87 cab (red/black top):

i like the idea of your front condenser and rear condenser with filters. i dont want to put condensers in my wheel wells as i track the car and i dont care what anyone says, all it takes is one lug nut or rock despite a stainless screen to ruin my day let alone the added weight. also i am staying with R-12 cuz i dont give a damn about al gore or the planet cuz i live in hell(arizona). you wanna test? try 116-118 degrees F with humidity.(july/august here). makes the east coast look like kindergarten as far as temps.

we just finished an entire retro of a 74 karmann ghia a/c system to r-134, with (2) spal fans on 12x14 condensers in front of both front wheels. stock crappy oem evap, new compressor, and we made the lines and fittings. blows 31.9 degrees on a freeking 116 degree F day. you actually have to turn the fan down or yer teets will freeze off.

so we kind of know something about a/c. not everything and really dont care to know everything about a/c unless i was in the biz which i aint and never will be.



so quote ME a price on a front zoomy condenser in the OEM spot, and a rear zoomy condenser in the rear oem deck lid spot with filters for a R-12 system on my 1987 cab.

gonna go with griffs evap and evap(whirbelwinder) fan and dryer bottle. we will make our own lines once again.


joe and i will test the HELL out of them here and if its GOOD we will say so in spades. if its CRAP we will say so X 1-BILL-YON! cuz thats how we roll!


i love being a lab rat test guinea pig!

Cool.... Looking forward to the results from the lab rat.

As I said before, I used the Retro system due in large part to the light condenser in the hood as opposed to multiple and/or exposed locations.

It would be nice to see you sell your product through one of the suppliers (e.g. a Retro or similar) as I do think it appears to be a better mousetrap and you are doing some nice engineering on it.

I won't be changing out mine, but if I had to, I am pretty sure I'd be buying your condenser....

D.

89 911 carrera oem deck lid oem condenser
 

http://forums.pelicanparts.com/uploa...1311633694.jpg


89 911 CARRERA OEM DECK LID OEM CONDENSER

I thought some of you guys would like to see the latest R-12 Freon technology Porsche used for their early model 1989 911’s
Rear Deck Lid OEM TUBE & FIN O-Ring Fittings Condenser before the changed to water cooled 911s and changed the body style; this car also has a front condenser 5 inches wide and about 20 or so inches long that fits between the front wheels flat but it is the same as the other previous 0-Ring front condensers I believe

This model year was basically the end of the 911 line in 1989, which started in the early 60s, before they changed to water cooled

This Black 89 911 was in the shop for work not related to A/C work, but for other mechanical repair work.

I am showing this to you for a few reasons related to it’s deck lid A/C OEM BEHR condenser and has an unusual high pressure side hose connection on the Right

The condenser is tube & fin, but it is an enhanced updated double pass tube & fin design compared to the flair fitting ones, and the early 83 on 0-Ring fitting SC’s and other 911/930 models, I am not sure what year after 83 Porsche started using this latest 911 prior to 89 condenser? But it can be identified fairly easy when the deck lid is open and you see the horizontal bottom edge of the deck lid closest to where you would be standing is not squared it is tapered (prior deck lid condensers were squared and were less passes and not as efficient)

What is also unusual compared to some prior years is the U shaped high side hose connection coming from the compressor on the right

Note: I am not an expert on this A/C system so if I made any mistakes in my description feel free to correct me!

1989 models are my favorite 911, I was very sad what Porsche made after the early 1989 models!