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VIAIR 300P Engine Bay Mounting & Hardwiring

Discussion in '3rd Gen. Tacomas (2016-2023)' started by Technique, May 10, 2022.

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  1. May 10, 2022 at 9:18 AM
    #1
    Technique

    #1
    Technique [OP] Well-Known Member

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    The VIAIR compressors seem to be very popular but I could never find a mount to purchase for it nor any guides on how to make one. With mounting in the engine bay, I also decided to hardwire it and put a switch inside the cab as well as run the air hose to the rear of the truck.

    This isn't a true step-by-step guide, but I wanted to share what I did so others who were in the same boat had something to go off of.

    Parts list

    I started out using some cardboard to create the template to cut my sheet metal and mark the holes for mounting. Then proceeded to cut the sheet metal to size and threw on some paint for the hell of it.

    Here is the compressor installed on the mount.

    Screen Shot 2022-05-10 at 10.01.19 AM.jpg
    IMG_0322.HEIC.jpg


    Once the compressor is installed to the mount, I went and secured it into the engine bay as seen below. I mounted it in the top left corner as there were 3 pre-threaded mounting points. I also used a 90-degree connector to send the hose straight down.

    IMG_0323.HEIC.jpg

    Mounted the air hose in the rear next to the license plate. It's a bit off-center because I mounted it up behind a piece of metal to make it sturdier.
    D7439D66-27E5-4A27-9194-621108C9857C.HEIC.jpg

    Next up is wiring. This part took me a minute to figure out but finally understood how relays and all that fun stuff worked.

    I snipped off the ends of the stock compressor wiring so it could be wired to the relay/ground.
    The 40A inline fuse cable goes from the battery to the relay. Stock compressor positive wiring goes to the relay, ground goes to ground. Then a 16-18awg wire goes from the relay to your switch inside the cab and that's pretty much it.


    Pretty happy with how it turned out. $15 for the metal to make the mount, $15 for the switch, $6 for the relay and used wire I had laying around. Beats paying $150 for the premade mounts. Hope this helps those who are in the same boat I was!
     
    Technique, May 10, 2022
    #1
    mabupa, bobbidugnutt, SlizzyMcSlizFace and 11 others like this.
  2. May 10, 2022 at 10:28 AM
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    caribe makaira

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    caribe makaira Well-Known Member

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    caribe makaira, May 10, 2022
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  3. Jun 10, 2022 at 12:45 PM
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    trktwo

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    trktwo Nagger

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    nice, thank you
     
    trktwo, Jun 10, 2022
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    Technique[OP] likes this.
  4. Jun 10, 2022 at 12:52 PM
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    metalmule

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    metalmule Well-Known Member

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    thanks
     
    metalmule, Jun 10, 2022
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    Technique[OP] likes this.
  5. Jun 10, 2022 at 7:46 PM
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    scouterjan

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    scouterjan Well-Known Member

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    Great job
     
    scouterjan, Jun 10, 2022
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    Technique[OP] likes this.
  6. Jun 11, 2022 at 4:49 AM
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    willtill

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    willtill Well-Known Member

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    Any concerns with the air compressor and heat from the engine compartment?
     
    willtill, Jun 11, 2022
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    Technique[OP] likes this.
  7. Jun 11, 2022 at 6:10 AM
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    Skydvrr

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    Skydvrr IG: @kalopsianick

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    Sweet. Maybe I should mount mine up there as well.
     
    Skydvrr, Jun 11, 2022
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    Technique[OP] likes this.
  8. Jun 11, 2022 at 8:00 AM
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    Technique

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    Technique [OP] Well-Known Member

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    I don't think so. People have been mounting ARB compressors in there since the dawn of time. Time will tell.
     
    Technique, Jun 11, 2022
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  9. Jun 11, 2022 at 11:20 AM
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    scouterjan

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    scouterjan Well-Known Member

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    So far I just keep mine in the bag it came in. I don't off road very often so for now I just hook it up when I need it, but that's a convenient way if you use it a lot
     
    scouterjan, Jun 11, 2022
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  10. Jun 11, 2022 at 12:24 PM
    #10
    Technique

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    Technique [OP] Well-Known Member

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    I don't use my a lot, but I just needed more space in the cab, lol. And I liked the idea of having it ready to go whenever, not having to take it out of the bag and hook it up, pop the hood etc etc.
     
    Technique, Jun 11, 2022
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  11. Jun 11, 2022 at 6:40 PM
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    metalmule

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    metalmule Well-Known Member

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    [​IMG]

    This is a great reason to mount a compressor, saving space is a plus but you can also do neat stuff like this
     
    metalmule, Jun 11, 2022
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  12. Jun 11, 2022 at 8:36 PM
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    ktbell444

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    ktbell444 One who throws exceptions

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    I see we had the same idea :cheers:
    Screenshot_20220611-233546_Gallery.jpg
     
    ktbell444, Jun 11, 2022
    #12
    Technique[QUOTED][OP] likes this.
  13. Feb 27, 2023 at 8:41 PM
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    TacoGeeloor

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    TacoGeeloor Well-Known Member

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    Any updates on how it’s holding up? I have a 450P that I was planning on mounting much like you did but I found that the P isn’t meant to be in the heat/moisture/dust where the C is built to be mounted in places like under the hood. I see you have a P series, is it doing ok under the hood?
     
    TacoGeeloor, Feb 27, 2023
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  14. Feb 28, 2023 at 1:19 AM
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    ktbell444

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    ktbell444 One who throws exceptions

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    I have an ARB mounted under my hood, the non-portable version. Did you mean to quote @Technique?
     
    ktbell444, Feb 28, 2023
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  15. Feb 28, 2023 at 5:35 AM
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    TacoGeeloor

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    TacoGeeloor Well-Known Member

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    Most likely…sorry!
     
    TacoGeeloor, Feb 28, 2023
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  16. Feb 28, 2023 at 6:52 AM
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    Technique

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    Technique [OP] Well-Known Member

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    Yep! It's still workin like a charm.
     
    Technique, Feb 28, 2023
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  17. Feb 28, 2023 at 6:56 AM
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    TacoGeeloor

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    TacoGeeloor Well-Known Member

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    Awesome thanks
     
    TacoGeeloor, Feb 28, 2023
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  18. Mar 6, 2024 at 2:50 PM
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    cwk84

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    cwk84 Active Member

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    Lift and tires

    How did you connect to the relay?
     
    cwk84, Mar 6, 2024
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  19. Mar 8, 2024 at 6:48 AM
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    Technique

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    Technique [OP] Well-Known Member

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    Technique, Mar 8, 2024
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    cwk84[QUOTED] likes this.
  20. Mar 8, 2024 at 3:24 PM
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    cwk84

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    cwk84 Active Member

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    cwk84, Mar 8, 2024
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