A customer email about a Griffiths Air Conditioning Upgrade in their 1974 911.
The air conditioning system worked well. upon taking the car out of the garage, it was capable of maintaining a comfortable temperature within the car at the second evaporator fan setting (7 amps). from this i conclude that there is good reserve for cooling the car down if it had been baking in the sun.
The front oil cooler is essential if anyone intends to use this system in very high ambient temperatures. in fact, i think it's a good idea for any use of the system, given that a higher percentage of the heat load from the ac goes into the engine compartment at lower ambient temperatures.
The only thing i might do differently if i were to do it again is to add your variable fan speed control. even at this point it would not be that difficult to do, but it's not that big a deal.
The only place where my experience departed significantly from what you said was with the load on the car's electrical system, something i had kept in the back of my mind during the whole project. i determined that for urban driving the existing alternator (50 amp, and not the original one) was insufficient to keep the battery charged. this is because during stops the drain on the batteries may be as much as 30 amps and the existing alternator did not have sufficient headroom to make up for that during the periods of driving. i think that on the highway this would not have been a problem. i installed a 95 amp alternator which appears to have solved the problem. i also put in led light sources in place of the H4 halogen bulbs, which cuts the current load from the headlights in half.
(note, the calculated amp load with the this system is 35 amps nominal)
So i would call the project a success. My wife thinks it works better than the one in her Boxster. Her primary complaint is that sometimes it gets too cold in the car.
An update on my project here in Australia.
Today I had my system commissioned (vacuumed, purged & charged), which all went ahead without a hitch.
I particularly like the improvement the new fan control has made to get just the right airflow that you need.
I got it done just in time for our summer, which is starting to heat things up over here.
My mechanic said it was the coldest system he’s seen on an 80’s model 911.
Well done to you and everyone at Griffiths Technical, for excellent quality products & making it possible for the home mechanic to do a lot of the installation.
Wishing you all a Happy Christmas.
I installed the system over a weekend and had it charged a week later. After 2 or 3 weeks of use the A/C is awesome, coldest it has ever been! Thank you very much for your support and great product! Bruce
Griff:Just a quick note to let you know the new motor was installed today in my 911 Porsche SC. The instructions and all your help worked well for my Mechanic. I don't have the patience any more even though I am an old tool and die maker and have the skills but not the patience. The motor works great, almost blew the doors off the car when turned on high speed.Thanks for all of your suggestions and great instructions.Regards,A.J.K.
Got the Ice system in my 1987 911 Cab – glad I have it as it has been 104 to 108 the last week – at 108 I need to run it full blast but is holding its own – finding the temperature for the engine is a bit higher due to the extra work but just a hair higher .
Now I can drive it in the summer !
Great product and thank you for all of your help !
Just wanted you to know that we had a good year with the new A/C system.
Thanks for all your help.
vince ( 1973 911)
I got your AC system kit few years ago. And I feel nice every driving time.
Installed 2 Kuehl rear fender condensers, Kuehl evaporator, Kuehl front condenser, Kuehl Center Vent
My German mechanic here couldn’t believe how cold. I have regularly seen mid 30s as high as 97F in Florida and Hawaii. Not sure how you do it, but it rocks. Thanks for the assistance and great customer service as usual.
1988, 911, Cabriolet, Installed Kuehl rear fender condenser and Duehl Kuehl fender condenser, Kuehl Serpentine Front condenser, Kuehl Serpentine evaporator, Denso compressor, Kuehl Center Vent, Kuehl Wirbelsturm Hurricane evaporator blower motor, Kuehl Variable Speed Fan Controller, Kuehl barrier hose set, drier, high low pressure switch, running R134a.
Hello Griff, I took the 911 to a car show today after work and everything was great!! Outside ambient temperature reached 92 degrees, I had 65 degrees in the cabin. OH YEAH !!!! Thanks again for everything.
Griff, I was the customer trying to track down a leak in my 85 911 upgraded system. New hoses, denso comp, front cond, hi/low press, evap and dryer. Using my friends sniffer (Johnson Controls RLD-H10G universal service leak detector) I found the leak in the window of the replacement dryer (not yours). Fixed that and again followed your directions with vacuum/fill. At 91* and 64% humidity I filled w/2 lbs 7 oz for a 25-26/230-235 vent blowing in the 30's then settling in 40's. I am completely happy with that temp. I also have your bowtie vent.
Thanks for your patience and help.
Hi Charlie, I hope all is going well in your world. As you may recall, I bought a dual kuehl setup last year for a project car - it's a 1984 carrera coupe, backdated body and interior, and will be daily driven in Colorado. The car came out great, and your A/C system has made it a truly useful car. We're now into the high heat season in Denver and I can say I've owned a few 911's and they never cooled well, your product is really great
Just wanted to tell ya Charlie. We installed your 2 Kuehl Fender Condensers and your Serpentine Front Condenser in that old 1970 Porsche 911t a while ago.
The customer was driving around the other day, it was 115 F outside. That Griffiths Air Conditioning System Is Blowing Cold at 40 F out the vents. He loves it!
Just wanted to tell you the Griffiths Air Conditioning in my Porsche is Strong 10 years Later. I bought a complete system upgrade from you for my Porsche 911 back in 2005, and its 2015, that's nearly 10 years and it has performed perfectly, great 30 degree air coming out the vents when its in the 90's down here in Florida.
An awesome day driving through the Black Forest on one of the hottest days this summer...temps hovering in the high 90s and the first time I've been out in the afternoon driving in such temps since last summer here in Germany.
My Kuehl A/C was rocking! Running the system in my '88 Cab kept us cool and dry during spirited driving in the Forest. I ran the system at about 85% cold setting and about 95% fan setting. (I have the variable fan controller and Hurricane fan and like a lot of air blowing on me.)
Vent temps varied between about 35 and 40 degrees Fahrenheit as the compressor would cycle on and off. I have the dual Kuehl condensers in the LR wheel well. Installed in 2008.
Interior temps ran between 75-77F all day. I realized at the end of the day that I did not have the vent lever on the heater/vent panel closed so 95+ outside air was coming in the cabin all day so I'm sure the cabin temps would have been a little lower if I had closed the vent.
Engine oil temp hovered about 205F all day.
Griff, I was the customer trying to track down a leak in my 85 911 upgraded system. I had purchased the Griffiths 911 Porsche Air Conditioning Reliability Package: New hoses, denso comp, front cond, hi/low press, evap and dryer. Using my friends sniffer (Johnson Controls RLD-H10G universal service leak detector) I found the leak in the window of the replacement dryer (not yours). Fixed that and again followed your directions with vacuum/fill. At 91* and 64% humidity I filled w/2 lbs 7 oz for a 25-26/230-235 vent blowing in the 30's then settling in 40's. I am completely happy with that temp. I also have your Kuehl vent.
Thanks for your patience and help
Picked up the car around noon today (+31 C), and daringly adjusted the fan and thermostat, within just a short distance of driving, the new system was blowing ICE cold air into the cabin - unbelievable, that after an unknown number of years of no functional AC, it's been resurrected and I am TOTALLY impressed. Thanks Griff for your exceptional product and assistance in answering my questions during my install. I had a lot of reticence when I started a few short weeks ago, but... JOB DONE!
Many thanks for the new Kuehl evaporator, and all the well thought and improved around parts. The AC system is working so good then never before. I followed your instructions and see that you are a lot experienced with the 911 types and everything is fitting 100%. Super ideas, the core plastic bottom base square to guide the air and the improved driver side hose to close the gap for that inlet. And also the screws to close quickly the evaporator box
The Kuehl vent has been installed. It took more than 15 minutes because there was a radio part in the way on the right side. It works as advertised! So here you have a factory looking installation.... you have to admit, it does look OEM. We can tell you that it feels and acts like original equipment !
The Porsche 924 Fuel Line 477 209 241 I got it was a perfect fit. Thanks again n I'll deff spread the word I was very impressed all the way around with ur company
Thanks Charles for all the research and great service….
I received my thermostat today to replace a 26 year old Porsche part. Thanks for the customer service, no small wonder you have such a great reputation in the Porsche community.
Your Porsche 911 Engine Fuel Lines are top notch! Well worth the time and effort locate your products. Only regret you don't offer more Porsche parts. Thanks for all the interim support and info. Your company is one step ahead of my expectations. We' discuss AC needs in the future.