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Thread: Under Bonnet ARB Compressor

  1. #11
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    Quote Originally Posted by AndrewMilne View Post
    I don't think that under the bonnet is a good place for a compressor, and especially not near the exhaust manifold/s, exhaust down-pipe, or turbo.
    When you run a compressor, it gets hot, and so does the air that has been compressed. This heat has to be disposed of by the compressor (which is why it has cooling fins).

    Under the bonnet, the intake air for the compressor is already going to be heated (and hence somewhat expanded).
    So then the compressor is trying to compress warm air that has been expanded prior to entering it.
    AND the compressor has to dispose of extra heat after compressing the warm air.
    AND the compressor has to transfer heat to already hot surroundings!
    Inefficient and hard on the compressor.
    AndrewMilne
    ..... I have an ARB compressor installed on an ARB dual battery tray and my solution to the underlined above was to remove the disc filter, and fabricate and attach a snorkle pipe in its place. The snorkle pipe passes through the fire wall and then up to near the bottom of the A pillar beside the glove box. The disc filter is attached on the end of the snorkle pipe. The compressor only draws clean conditioned air from the cabin.

    onebob
    LROCV member #131
    1999 build D2 TD5 Auto, Mantec snorkel, 2" LRA spring lift, ARB on board air, Ashcroft ATB, CMM air ram CDL shifter, swag & gold pans ....

  2. #12
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    Quote Originally Posted by onebob View Post
    ..... I have an ARB compressor installed on an ARB dual battery tray and my solution to the underlined above was to remove the disc filter, and fabricate and attach a snorkle pipe in its place. The snorkle pipe passes through the fire wall and then up to near the bottom of the A pillar beside the glove box. The disc filter is attached on the end of the snorkle pipe. The compressor only draws clean conditioned air from the cabin.

    onebob
    I Likee.

    Also in the back bit of the load area. That works for me too.

    I.

  3. #13
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    Quote Originally Posted by Fast Freddie View Post
    A careful analysis of the available data would seem to suggest that :
    • Putting it under the bonnet is a great idea, because "I've done that".
    • The head will come off the compressor though.
    Ill clarify It blew the air cylinder off the compressor not the head. Could be that i have a 19 ltr air tank plumbed straight into the compressor so the ARB boffins tell me

  4. #14
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    Quote Originally Posted by rangieman View Post
    Ill clarify It blew the air cylinder off the compressor not the head. Could be that i have a 19 ltr air tank plumbed straight into the compressor so the ARB boffins tell me
    Sorry about that, I didn't mean to appear rude.

    Some good suggestions and alternatives appearing in this thread though. Chilled air from the cabin or stowing the compressor in the rear panel sound great.

  5. #15
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    Quote Originally Posted by onebob View Post
    ..... I have an ARB compressor installed on an ARB dual battery tray and my solution to the underlined above was to remove the disc filter, and fabricate and attach a snorkle pipe in its place. The snorkle pipe passes through the fire wall and then up to near the bottom of the A pillar beside the glove box. The disc filter is attached on the end of the snorkle pipe. The compressor only draws clean conditioned air from the cabin.

    onebob
    My ARB onboard compressor is the "littlun" that's recommended for air lockers. However I don't have airlockers but use it for my air ram Center Diff Lock actuator. The compressor has a pressure switch and only comes on for short bursts every 20 minutes or so. Other than that it's also used for "airing up" the tyres at the end of the expedition and for that the engine need not be running, the engine compartment lid is open and so no stress on the "littlun" = happy days.

    onebob
    LROCV member #131
    1999 build D2 TD5 Auto, Mantec snorkel, 2" LRA spring lift, ARB on board air, Ashcroft ATB, CMM air ram CDL shifter, swag & gold pans ....

  6. #16
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    I have had an ARB compressor under the bonnet on an ARB battery tray for a couple of years without problem. However due to my concern over the heat of the compressor from the turbo, I built a box around it, with a 80mm computer fan, blowing in air ducted from the front of the engine compartment. Works a treat, even if it looks weird.

    You can see the pictures and description on my post dated 14 May 2014 titled Wierd Project #2. Link is: http://www.aulro.com/afvb/discovery-...oling-box.html.
    Last edited by Mundy; 28th March 2015 at 03:20 PM. Reason: added link

  7. #17
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    ARB compressor under bonnet with V8 here
    http://www.aulro.com/afvb/projects-t...ompressor.html
    Coming up 5 years with no problem. It runs my SLS every day
    Steve

  8. #18
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    First choice for me would be inside the vehicle (cool and dry)
    Second choice would be in the engine bay with air pick-up point somewhere cool and dry.
    My last choice would be in the engine bay with the filters sucking hot air.

    Heat soak into the unit from the engine alone would see the unit getting to some respectable temps before you even begin to compress air. Then you will start to see even higher temps.
    -Mitch
    'El Burro' 2012 Defender 90.

  9. #19
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    Quote Originally Posted by onebob View Post
    ..... I have an ARB compressor installed on an ARB dual battery tray and my solution to the underlined above was to remove the disc filter, and fabricate and attach a snorkle pipe in its place. The snorkle pipe passes through the fire wall and then up to near the bottom of the A pillar beside the glove box. The disc filter is attached on the end of the snorkle pipe. The compressor only draws clean conditioned air from the cabin.

    onebob
    Would you mind posting a few pics of your snorkel set up for those playing at home please.

    Sounds like the go to me perhaps with a heat shield around it too for me.

    I

  10. #20
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    Quote Originally Posted by mrapocalypse View Post
    Would you mind posting a few pics of your snorkel set up for those playing at home please.

    Sounds like the go to me perhaps with a heat shield around it too for me.

    I
    certainly!...... I been away 4 days solo camping at Woods Point BEFORE the Easter Rush arrives and just got back home so log back-in in a day or two and I'll have some pics up.

    onebob
    LROCV member #131
    1999 build D2 TD5 Auto, Mantec snorkel, 2" LRA spring lift, ARB on board air, Ashcroft ATB, CMM air ram CDL shifter, swag & gold pans ....

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