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Thread: Electric Air Conditioning - VW Compressor

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    Electric Air Conditioning - VW Compressor

    Guys,

    I want to start planning a AC retrofit into my Datsun 510.

    Does anyone know anything about these VW Electric AC compressors?

    https://www.ebay.com.au/itm/Original...frcectupt=true

    Some kind of wiring diagram or service information would be magic. They seem like a suitable option.


    Thanks

    Tim

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    Resident Oaf Jim's Avatar
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    Following with interest.
    If they arenít CANBUS managed Iíd be shocked.
    Turns out, far too much has been written about great men and not nearly enough about morons


    Quote Originally Posted by seedyrom
    my neighbours called the cops...... not because of the sound of me working in the garage was too loud, but because i taped a cardboard box to my back, covered my self in vaseline and pretended i was a snail on their lawn

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    Registered User clutch-monkey's Avatar
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    Quote Originally Posted by Jim View Post
    Following with interest.
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    x2
    i've used the renncool units before (used for truck cabs)
    Quote Originally Posted by Walt Kowalski View Post
    Memes are only detectable by NSA.

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    BLING BLING PLAYA's Avatar
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    I have been importing these, you might notice they look exactly like rencool units lol. The rencool units they market as 20,000 Btu are not close to that. They are about 7000 to 10,000 but seem to do well because you just run them flat stick instead of at idle half the time like a combustion engine compressor.

    Issue with all of the electric vehicle compressors is they run at like 400 volts, great for them but not going to happen on your 12v system.



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    Last edited by PLAYA; 20-05-19 at 09:57 AM.
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    Founder Nick's Avatar
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    Here is a good read up on them, looked at this a while ago.

    https://www.vintageair.com/tech-topi...or-my-hot-rod/

    TLTR; To run a compressor to cool your car like a engine driven one requires shitloads of amps @14v, hence why most are 400v in hybrids. Can run lower 3000-4000 BTU ones, might be ok in your 510.
    Last edited by Nick; 20-05-19 at 11:12 AM.

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    Compressor and condenser packaging are the issues.

    I don't have available front space to change the accessory drive on the front of the motor.

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    Registered User matty12's Avatar
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    Cant run inline with the original belt setup?

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    Purist, whats that? Jason Broadhurst's Avatar
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    It'll always be alternator dependant.

    Once the alternator is upgraded, size up the correct compressor based on reserve current around the 2,000 RPM mark. Whatever BTU that gets you, is all you can have!

    That ebay item is likely 400 VAC too, off the hybrid motor/alternator.

    Being linear a 3000 BTU compressor will draw 83 A at 12 V but only 2.5 A at 400 V. That's why it only has a DTP sized plug on it (unless I can't see a bunch of post terminals elsewhere). Don't forget to budget load for fans.

    I've wired a 3000 BTU compressor in to a 1200 ute in Townsville, and through summer it was OK still.
    Jason Broadhurst

    Someone once asked me if they could use my mower. I said "sure, so long as it doesn't leave my yard"

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    I understand current draw will be pretty high. I'm just looking at my options.

    The engine has a single v-groove pulley which drives the alternator only at present. It may be possible to add a A/C compressor, but I wonder if a V belt will slip with those kinds of loads.

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    Eurotrash :D
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    why has no one made an alternator and compressor in one. would solve so many issues.

    how about driving the alt off the diff and mounting the compressor where the alt goes normally?
    Quote Originally Posted by Marv View Post
    Only be concerned if that Dunning-Kruger Motorsports bloke is there and goes all Captain Damphands McGigglefingers on you after a couple of lemon squashes....


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    Resident Oaf Jim's Avatar
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    Use a ps pump and aristo hydraulic motor on the ac compressor?
    Turns out, far too much has been written about great men and not nearly enough about morons


    Quote Originally Posted by seedyrom
    my neighbours called the cops...... not because of the sound of me working in the garage was too loud, but because i taped a cardboard box to my back, covered my self in vaseline and pretended i was a snail on their lawn

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    Quote Originally Posted by Sloth View Post
    why has no one made an alternator and compressor in one. would solve so many issues.

    how about driving the alt off the diff and mounting the compressor where the alt goes normally?
    I probably wouldn't get the alternator up the back easily.

    Got anything internally from VW you could share?

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    Opens Guido's Avatar
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    Alternator off the diff is the world's shittest idea for a street car. Especially one that has a bit of current draw.
    Rust is lighter than carbon fibre.

    My Italian 510

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    Defective Faux Forg's Avatar
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    How about a compressor with a twin groove pulley, with one groove driven from the crank and the second groove driving the alternator?
    Quote Originally Posted by Marlin
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    That could work. I totally agree a mechanical AC compressor is superior.

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    Registered User TRD-MX62's Avatar
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    Quote Originally Posted by PLAYA View Post
    I have been importing these, you might notice they look exactly like rencool units lol. The rencool units they market as 20,000 Btu are not close to that. They are about 7000 to 10,000 but seem to do well because you just run them flat stick instead of at idle half the time like a combustion engine compressor.

    Issue with all of the electric vehicle compressors is they run at like 400 volts, great for them but not going to happen on your 12v system.



    Sent from my SM-N960F using Tapatalk
    I have a 12v version I got direct from china about 10 years ago, apparently pulls something like 90 amps flat out... will see what happens when I get around to installing it...
    Quote Originally Posted by ALLMTR View Post
    the theory is the fuel pump is one of the only things that can fuck out on a diesel

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    BLING BLING PLAYA's Avatar
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    That one there is 12v hence those big ass cables. These are the ones rencool put the big label on
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    Eurotrash :D
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    Quote Originally Posted by tim510 View Post
    I probably wouldn't get the alternator up the back easily.

    Got anything internally from VW you could share?
    not from my vw side of things as e-golf isnt an aussie model. however my past at toyota as a hybrid tech...
    https://www.toyota-industries.com/pr...ssor/electric/



    es18 is the part, however these are 201v ac and are 3 phase. also it seems all electronic a/c uses nd-11 oil, a special dieletic oil.
    Quote Originally Posted by Marv View Post
    Only be concerned if that Dunning-Kruger Motorsports bloke is there and goes all Captain Damphands McGigglefingers on you after a couple of lemon squashes....


    I'M NOT A HOOKER BUT 20 BUCKS IS 20 BUCKS...

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    Non Compos Mentos Gammaboy's Avatar
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    Quote Originally Posted by PLAYA View Post
    That one there is 12v hence those big ass cables. These are the ones rencool put the big label on
    What do the non rencool ones cost?
    "Where can we get hold of a Vincent Black Shadow?" "Whats that?" "A fantastic bike," I said. "The new model is something like two thousand cubic inches, developing two hundred brake-horsepower at four thousand revolutions per minute on a magnesium frame with two styrofoam seats and a total curb weight of exactly two hundred pounds."

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    Is there not a cheap 12V motor that could be used to drive a regular AC compressor via gears? Gear ratio would mean the pump could be run at x rpm where its efficient and the electrical load should technically be lower compared to the Prius setup which uses the elec motor to direct-drive the compressor

  21. #21
    BLING BLING PLAYA's Avatar
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    Quote Originally Posted by Gammaboy View Post
    What do the non rencool ones cost?
    I think rencool was about 1700 this was about 500 delivered
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    Non Compos Mentos Gammaboy's Avatar
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    For cobbling together a non 911 install, that is starting to make sense...
    "Where can we get hold of a Vincent Black Shadow?" "Whats that?" "A fantastic bike," I said. "The new model is something like two thousand cubic inches, developing two hundred brake-horsepower at four thousand revolutions per minute on a magnesium frame with two styrofoam seats and a total curb weight of exactly two hundred pounds."

  23. #23
    BLING BLING PLAYA's Avatar
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    Bud if U need send me a PM I have two here as shipping was the same for 2 anyway I can send U some pics. My other one is for the 240z I'm building if you want U can have for my cost.
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    Registered User clutch-monkey's Avatar
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    Non rencool labelled sounds like it would be ideal for most, it worked ok the one I had.
    May have to do some measuring for the 911 though a bolt in solution is appealing

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    Quote Originally Posted by Sloth View Post
    why has no one made an alternator and compressor in one. would solve so many issues.

    how about driving the alt off the diff and mounting the compressor where the alt goes normally?
    Great idea! Why not have everything else on the engine so when something goes wrong you don't need to diagnose the issue and just change everything as they are all one unit.

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