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Old 07-09-2010, 02:20 PM   #81 (permalink)
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I have one of those pc pumps....cool toys. I bought it when I got into the HHO thing a few years back....long story and lots of money wasted. My brother is still convinced it works. I told him to go buy a hydrogen tank and supplement his gas with it if he is so determined....stubborn.

Great to see a real A/C seat.


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Old 07-14-2015, 03:17 AM   #82 (permalink)
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I don't mean to play grave digger but I have a few solutions to a few open ends to this post.
1 The Pump.
Going for a high volume, low pressure centrifugal pump is not what you want at all. The max head pressure on most of these pumps is 2 to 3 feet of pump head. Which translates to 1 to 2 psi. Not what you want when you are dealing with small lines.
Try a lower volume higher pressure diaphragm pump. Something such as a surflo.
2gpm at sufficient psi is more than enough.
2 the supply lines.
Nylon or polyurethane lines and push fittings are the perfect option for getting cold water from your cold water source to your seat. You can find them in sizes from 1/2 inch down to 4mm.
I don't know how well the softer aquarium lines do with the push fittings if you are depending on them to not leak. I have not tried this combination.
Just search for "push fittings" in the size you need some where like ebay or amazon.
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Old 07-14-2015, 09:56 AM   #83 (permalink)
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No offense taken.

Sure flow style was considered, but the higher amp draw , larger size and higher cost made me go with the super cheap centrifical. I countered the low head pressure by going to 6 parallel paths for the top with an additional 6 parallel paths for the seat. I used some garden hose to irrigation adapters that I got at lowes, they were 6 port each , so I had a T on both sides of of the pump out to these cheap adapters with barbs that worked perfectly with the soft silicone tube.

Push connect may have worked for the full flow lines, but they have a few drawbacks mainly involving not sealing at low psi and not working at all with soft tubing both of which I used. Potentially if a sure flow were used you could reduce the number of paths and shark bite would work, however I've never seen any small enough for aquarium tubing, smallest I know of is 1/4 OD that I used for my bypass oil return and that leaked everyplace. That said, all of the same fittings on the high pressure side held up fine as do the half dozen or so on the high pressure side of my water injection setup.

As a project update, it worked fantastic, I wish I had some thermal capacity, I couldn't leave the A/C off very long which as kind of the point. Geico hauled it away with the rest of the car after I got rear ended by a hit and run obviously drunk driver.
I'd like to do it again on either of my new TDI's, but unfortunately I'm to darn busy.
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Old 07-26-2015, 03:04 PM   #84 (permalink)
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I'm very interested in a retro-fit seat cooling device. I found some sites with some interesting stuff.

One is a seat cover that has tubes and a circulating pump. https://cooldatazz.com/

Another is a Youtube from a guy with a good How-To on fabricating a Peltier water cooling device.

And this is a guy who broke into a high end car heat/cool mechanism.

Probably not this summer but I'd love to have something for next summer.

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