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Posted by: Porsche Rescue Aug 29 2003, 02:41 PM

Brad asked for some pics of the AC I am removing from my latest project, 1970 914-6 bought on Ebay from SoCal.
First I have seen on a six but looks much like the 4 systems I've seen. Firewall was notched for the compressor but it is a pretty good job. Here it is.


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Posted by: Porsche Rescue Aug 29 2003, 02:44 PM

Whoever installed removed the fresh air fan box, cut a hole below it (don't understand why) and plugged the fresh air grill on the cowl. Fresh air is fed to the underdash unit by two tubes, one in each front wheel well (Why not use the original fresh air feed, less holes for me to plug?).


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Posted by: Porsche Rescue Aug 29 2003, 02:45 PM

Here is the underdash unit, DPD.


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Posted by: Porsche Rescue Aug 29 2003, 02:46 PM

Then we have the real marvel, an oil cooler plumbed with copper sitting on top of the condenser.


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Posted by: Porsche Rescue Aug 29 2003, 02:47 PM

Only good thing about this installation is the hole in the front trunk floor, usually they are larger!


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Posted by: tryan Aug 29 2003, 02:52 PM

did the pilgrims use that compressor on the mayflower?

Posted by: URY914 Aug 29 2003, 02:57 PM

And the worst type of oil cooler to use. Those tubes do just about nothing to cool the oil.

Paul

Posted by: fiid Aug 29 2003, 03:05 PM

Is it bad to use copper for plumbing automotive stuff - I am wondering about what I should use for water pipes for my watercooled conversion.

Fiid.

Posted by: Steve Aug 29 2003, 03:29 PM

Well Brad...
So far it looks like we'll be notching our firewalls.

Steve

Posted by: ArtechnikA Aug 29 2003, 03:39 PM

people do it. it's probably not a big deal when using substantial-size tubes for water.
the issue with copper (and aluminum) is that it work-hardens from the vibration flexing and cracks and breaks. little tubes can vibrate and flex; big tubes - not nearly as likely.

i'd think (but have no first-hand knowledge - so this is just armchair engineering...) that using lots of Adell clamps placed pretty close together would reduce and damp vibration.

the big-buck solution is AN-32 braided-steel line but i don't think very many people take that path. fewer after pricing it first :-) ...

Posted by: tryan Aug 29 2003, 03:52 PM

saden and nippondennso compressors are mucho smaller than that york piston pump. you might not have to notch if you can modify the mount to get the compressor closer to the motor.

Posted by: ein 6er Aug 29 2003, 05:45 PM

i have seen a foto of a 6 with a/c and the firewall was not cut. but i don't know what type of compressor it was.

Posted by: Steve Aug 29 2003, 07:25 PM

The biggest problem with an air conditioned six is the AC compressor pulley on the crank.
The second belt is way to far forward.
I have heard of people using the non airconditioned pulley and using one belt to drive the compressor and fan.
I have not seen any pictures or details.

Steve

Posted by: Brad Roberts Aug 30 2003, 12:20 AM

Steve.. what about the single belt serpentine conversion ??


The car I'm doing it on is a factory six.. I'll know in a few weeks whether or not it clears everything.


Thanks for the pics Jim !!


And ..yes .. If I have to I'll go to a Suzuki Samari style compressor (real tiny) but is effecient enough to cool a 914 cabin (to keep from notching the firewall)

B

Posted by: Brad Roberts Aug 30 2003, 12:22 AM

Steve..

what about running it off one of the camshaft ala powersteering pump for 3.6 ??

Interesting thought...



B

Posted by: ChrisReale Aug 30 2003, 12:22 AM

Just roll the windows down and save yourself the headache Although, when I was driving back from a Portland AX and it was anoput 98 degrees out, and I had two hot VRacers on the passenger side seat, AC woulda been proper

Posted by: Brad Roberts Aug 30 2003, 12:23 AM

When your 45-50 years old and have 70k to drop on a 914... you'll want AC.


B

Posted by: ChrisReale Aug 30 2003, 12:24 AM

Good point

Posted by: Mike9142.0 Aug 30 2003, 12:53 AM

A/C off the cam? That sounds like a lot of load for the cam when the clutch locks in.

Posted by: Brad Roberts Aug 30 2003, 01:03 AM

Actually Mike... these high effiency compressors barely draw 4-5 HP (unlike the old one pictured that robbed 8-10hp) It was just a thought.. I know the power steering pumps carry a decent load (they have to pump fluid 13 feet to and from the front of a 993). I wouldnt swear to it.. but I think the 3.6 has a extra bearing or some kind of extra support for the power steering pump.


B

Posted by: redshift Aug 30 2003, 01:08 AM

My God, is that a window unit?

=O)



M

Posted by: Mike9142.0 Aug 30 2003, 01:12 AM

The power stearing load is there all the time and wont change alot when worked. I would think the sudden load of the clutch locking may not be good for the cam.

Posted by: ArtechnikA Aug 30 2003, 09:21 AM

that was always my first thought too - it's also how the factory powered the MFI pumps, the Sporto torque convertor oil pump, and the 930 turbo scavenge pump (which was the Sporto pump, in a new incarnation ...)

Clay Perrine thought it was a really crappy idea, thought the 4-5 HP load would be bad for the cam drive. but i am unconvinced.

(i'm also not going to be AC'ing my /6 any time soon, so it's all academic ...

Posted by: fiid Aug 30 2003, 09:25 AM

Is there any mileage in running an electric compressor away from the engine to do this?? The you "just" have to upgrade the alternator a bit.

Just a thought.

Fiid.

Posted by: Steve Aug 30 2003, 09:40 PM

Brad,

I looked into the single serpentine belt but the company that made it discontinued it.
They said the the special clutch pulley on the compressor got cost prohibitive.
It looked like it would of worked.

Steve

Posted by: Brad Roberts Aug 30 2003, 09:42 PM

What ?? the pulley for the compressor ?? You mean the one that EVERY Chevrolet product with a LS1 engine has on its compressor ?? Was this Richard Clewitt ??


B

Posted by: Steve Aug 31 2003, 05:16 PM

It was an add in the October issue of Excellence.
SernaSport & EagleDay on page 164
It was called Wide Track Single-Belt Pulley kit.
1-800-658-8810
It used to be on there web site but they took it off.
http://www.eagleday.com

Does Clewitt carry it??

Steve

Posted by: Steve Sep 1 2003, 11:09 AM

I checked Clewetts web site.
It looks like they still carry the serpentine belt conversion.
There usually at the German Auto Fest.
I will see if I can get more info there.
I'm curious if there crank pulley will work with a 911 non airconditioned cross bar motor mount.
That's what my Rich Johnson mount is built on.
Maybe I will give Clewett a call this week if I can find time.

Thanks again for your help Brad.

Steve

Posted by: seanery Sep 1 2003, 12:36 PM

He's in Manhattan Beach, got a shop in the back yard. You should cruise up and check it/him out. He's a nice guy with some cool toys!