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Old 06-26-2009, 11:38 PM   #19
texkid
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Update:

Yes, I had the circulation backwards.

However, I did some more research. Insulating the high pressure side will not improve cooling. Some mechanics sites say it'll do nothing....others say it'll put more pressure on the compressor, and blah, blah, blah.

Personally, I have not seen ANY positive results on insulating the High Side. In the meantime, I am going to research for insulation that withstand higher temps.
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Old 06-27-2009, 12:33 AM   #20
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Those foams you installed are in the vicinity of the very hot exhaust manifold.
212F is what water boils at. It's not really that hot when thinking in terms of an engine.
I'll pass on this one myself....
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Old 06-27-2009, 01:24 AM   #21
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A/C temp is directly affected by outside ambient temperature. So from different times of the day and different days you are going to get different results.

I get cars in my shop on extremly hot days saying thier ac is not cooling as efficently as before. But yet thier a/c is fully charged. So charging wont make a difference.
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Old 06-27-2009, 06:10 AM   #22
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what an interesting idea, can certainly be useful here in our hot hot tropical days, the AC can really struggle sometimes...

I have a friend who works at an airconditioner repair workshop, maybe he can get his hands on the high-temp stuff
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Old 06-27-2009, 07:11 AM   #23
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I just sent off some e-mails to companies about their mineral wool pipe insulation for pricing. I'm having trouble finding this stuff.
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Old 06-27-2009, 07:12 AM   #24
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NiNjA pOsT!
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Old 06-27-2009, 07:20 AM   #25
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I just sent off some e-mails to companies about their mineral wool pipe insulation for pricing. I'm having trouble finding this stuff.
Check out McMaster Carr:

http://www.mcmaster.com/#pipe-insulation/=2hwsny
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Old 06-27-2009, 07:29 AM   #26
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Thanks Scott!

How long is this pipe by the way?

Hmm, that site has a 2'x4' sheet for 6 bucks, not bad.
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Old 06-27-2009, 10:16 AM   #27
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Fantastic idea! I did this yesterday after I got home, except I used fewer zip ties and employed the use of aluminum tape. With the aluminum tape, the air temperature recorded on the meat thermometer was 37 degrees! Best cheap thing I've done to my car hands down.
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Old 06-27-2009, 10:44 AM   #28
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Did you do both lines?
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Old 06-27-2009, 11:04 AM   #29
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You mean the high pressure and low pressure? No, just the low pressure going into the cabin. My hands aren't small enough to work with the high pressure lines.
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Old 06-27-2009, 03:22 PM   #30
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Quote:
Originally Posted by PK198105 View Post
rubber is the best insulator
Quote:
Originally Posted by PK198105 View Post
Air is the best insulation.
The funny thing is, neither is "the best" insulator, or particularly good in the grand scheme of things.
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Old 06-27-2009, 06:13 PM   #31
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Quote:
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here is what i did:

i covered the rear return line with high temp aluminium tape. Temp resistance up to 180C
Where did you find the aluminum tape? Was it easy to apply?
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Old 06-27-2009, 06:33 PM   #32
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You can also find the aluminum tape at Menard's and Home Depot in the home ventilation section.
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Old 06-27-2009, 06:45 PM   #33
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the local Rona in the vents and ac department. its like regular tape but with aluminium in it. very easy to apply. but gets pretty hot to the touch after you drive for a while
How's the air running? Same as with other setup? Or cooler?
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Old 06-27-2009, 07:04 PM   #34
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haven't really got a chance to check, i got the aluminum foil mostly to protect the insulation from melting
Ah. I see. So far, mine hasn't melted. In fact, after doing some errands, I checked the insulation and it wasn't hot to the touch. But I did burn my left forearm from grazing the engine surface.......again.
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Old 06-27-2009, 07:51 PM   #35
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I got half of this diy project done this PM and I believe that it helped already! At the only contact between the high and low pressure lines I slide a piece of thin aluminum pie tin. After a short drive today high pressure line was not even warm...but maybe I didn't drive long enough.

Great pics and a really good project!!!!! Thanks......
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Old 06-27-2009, 08:07 PM   #36
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There's another section of the low pressure line pretty far down in the engine bay - right where the rubber hose ends and just before the a/c compressor. About an hour ago I spent about 20 minutes wrapping that in the foam insulator and the aluminum tape, then I drove the car for a while. The air temp dropped another degree. Just an fyi.
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