1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Poor man's OBA

Discussion in 'Technical Chat' started by tamer, Apr 30, 2017.

  1. Apr 30, 2017 at 11:38 PM
    #1
    tamer

    tamer [OP] hamerworx.com

    Joined:
    Aug 21, 2008
    Member:
    #8674
    Messages:
    474
    Gender:
    Male
    SoCal
    Vehicle:
    Taco No More
    Mounted a Viair 88p under the hood this weekend. I looked around for a while and it seemed like not many people had done this before. Found one instance here: https://www.tacomaworld.com/threads...-4x4-pic-heavy-af.448825/page-3#post-14715180

    Anyways, I took that idea and ran with it. The goal of this project was to keep it under $100, which I think I've achieved. I also wanted to have an auto shutoff so that the compressor wouldn't blow itself. This system will allow me to hookup a tank later if needed. I can also remove the compressor and use it elsewhere if I need to. I chose the 88p because it had a pretty good duty cycle, and it was relatively cheap.

    Parts list:
    Viair 88p Compressor (Was $50, now $60): https://www.amazon.com/gp/product/B005ASY23I/
    Viair 6-port Manifold ($15.95): https://www.amazon.com/gp/product/B00RMC4J2Y/
    Viair 90/120psi Pressure Switch ($21.95): https://www.amazon.com/gp/product/B002AYJUXW/
    150psi Safety Valve ($5.95): https://www.amazon.com/gp/product/B0081TJJDG/
    1/4" NPT Plug ($1.30): https://www.amazon.com/gp/product/B00DE7KMTK/
    1/8" to 1/4" NPT Adapter ($7.95): https://www.amazon.com/gp/product/B004RCOY5O/
    2.5" ID Hose Clamp ($1.70): https://www.mcmaster.com/#catalog/123/1584/=17fkbtl
    2x Barbed NPT Fitting for 3/16" ID ($2.95): https://www.mcmaster.com/#catalog/123/314/=17fkc3u

    Already on the truck was a battery tender terminal: https://www.amazon.com/Battery-Tender-081-0069-6-Terminal-Disconnect/dp/B000NCOKZQ/

    I cut this one in half to wire into the compressor for an easy connection: https://www.amazon.com/Battery-Tender-081-0148-12-Extension-Cable/dp/B002DU3TTO/

    I'm sure the last two items can be found on Amazon as well, but I had a few items I needed from McMaster, so I got them from there. Total cost was ~$110. I had NPT quick release fittings in house already, and I was able to reuse the 12ft+ of hose the compressor came with.

    You'll need an M8x1.25 screw to mount the manifold.

    I started by taking the red cover off the compressor and wiring in the battery tender cable. This allowed me to connect it to the battery easy. I also had to swap the fuse on the battery to a 20amp so the compressor wouldn't pop it. When I finally get an auxiliary fuse block I'll wire this directly to it and clean up the wiring a little.

    423D35EB-8D45-4EE6-A9B0-C0B5A1F39103.jpg
    59F3C074-E664-41BE-9A00-04B20B252843.jpg

    Final product is a compressor with a connector that works with the battery tender terminals, also cut the hose to have a short hop to the manifold. The rest of the hose will be used for a quick disconnect to the truck bed.

    FDA8496D-9B0A-471E-91DD-1BBB93501011.jpg

    I don't have photos of the next step, but basically I tapped into the compressors negative to wire through the switch. This switch is mounted to the manifold, it turns on when the system pressure is under 90psi, and turns off when it reaches 120psi.

    D572F897-76E3-4AD1-A5E4-333A4B556AF0.jpg

    Finally I mounted everything up. The hose clamp is used to mount wrap around the compressor and mount it to the top of the wheel well. The safety valve blows at 150psi just in case the pressure switch fails. This all allows me to pop on the compressor and not worry about blowing the compressor when I'm walking between tires. I still need to run the remaining 12ft of hose it came with to the bed, for a second quick release there.

    Let me know if you have any questions.

    IMG_8082.jpg
     
    Last edited: Apr 30, 2017
  2. May 1, 2017 at 4:21 AM
    #2
    Blais03

    Blais03 Guess I'll bring a spare wheel bearing...

    Joined:
    Nov 13, 2015
    Member:
    #169518
    Messages:
    4,175
    Gender:
    Male
    First Name:
    Nick
    Easthampton MA
    Vehicle:
    '08 Reg. Cab 4WD 5-speed
    I might need to change up my set up a little bit after seeing this! You went way more in depth than I did lol
     
  3. May 1, 2017 at 9:03 AM
    #3
    tamer

    tamer [OP] hamerworx.com

    Joined:
    Aug 21, 2008
    Member:
    #8674
    Messages:
    474
    Gender:
    Male
    SoCal
    Vehicle:
    Taco No More
    Your setup was pretty nice as well. It definitely help me wrap my head around what I wanted to do. Just took it a few steps further.
     
    Blais03 likes this.
  4. May 1, 2017 at 1:21 PM
    #4
    Blais03

    Blais03 Guess I'll bring a spare wheel bearing...

    Joined:
    Nov 13, 2015
    Member:
    #169518
    Messages:
    4,175
    Gender:
    Male
    First Name:
    Nick
    Easthampton MA
    Vehicle:
    '08 Reg. Cab 4WD 5-speed
    I like it!
     
  5. May 1, 2017 at 7:14 PM
    #5
    Horger12

    Horger12 Well-Known Member

    Joined:
    Mar 6, 2017
    Member:
    #212526
    Messages:
    275
    Gender:
    Male
    Albuquerque, NM
    Vehicle:
    2017 Barcelona Red OR-DCSB
    5100s, Toytec AAL, Falken Wildpeaks, CaliRaised Ditch Pods, BAMF Sliders and Bed Bars
    Nice! I may do this now
     
    tamer [OP] likes this.
  6. May 2, 2017 at 9:52 AM
    #6
    tan4x4

    tan4x4 Well-Known Member

    Joined:
    Nov 30, 2011
    Member:
    #67982
    Messages:
    3,798
    Gender:
    Male
    First Name:
    Rick
    Folsom, CA
    Vehicle:
    99 Tacoma EC 4x4 2.7L Auto
    Bilsteins, OME 881's, 3-leaf AAL, Detroit TruTrac, Tundra brake swap, Michelin LTX AT2, Tranny skidplate, TC skidplate, CBI rear bumper, TG sliders, UltraGauge, PowerTank, Reverse Camera
    Later on, you might want to add a small 'reservoir' tank. It will make the system more effective and lessen the constant on/off wear and tear on the pump. You already have an un-used manifold fitting where the plug is.

    Keeping with your 'poor mans oba' approach, you could use some schedule 40 PVC pipe (rated at around 300 psi !).
     
    tamer [OP] likes this.
  7. May 2, 2017 at 11:59 AM
    #7
    ExplorHer

    ExplorHer Question Authority

    Joined:
    May 2, 2016
    Member:
    #185889
    Messages:
    551
    Gender:
    Male
    Near Vegas
    Vehicle:
    2016 AC, 4cyl, 5MT, 4x4, SRUP with some junk.
    Looks great to me.
    Just curious as to why you chose the 88P? Not hating, I'm just not familiar with Viair's product line.
     
    tamer [OP] likes this.
  8. May 2, 2017 at 12:09 PM
    #8
    eon_blue

    eon_blue 8" third member

    Joined:
    Mar 4, 2016
    Member:
    #180213
    Messages:
    33,561
    Gender:
    Male
    First Name:
    Ryan
    Monrovia, CA
    Vehicle:
    Supercharged 2004 3.4l TRD 4x4 Tacoma XtraCab w/5 speed
    I love my 88p, this is awesome lol.

    One thing I've started to notice on mine though is that it likes to blow the fuse lately, not sure if maybe I over-worked it at some point but I've gone through 3 fuses in the past couple months. I use it at least a few times a month.

    Not a big deal as the fuses are really cheap and I just keep a pack of them in my truck when needed.
     
    tamer [OP] likes this.
  9. May 2, 2017 at 7:45 PM
    #9
    tamer

    tamer [OP] hamerworx.com

    Joined:
    Aug 21, 2008
    Member:
    #8674
    Messages:
    474
    Gender:
    Male
    SoCal
    Vehicle:
    Taco No More
    Yea, I definitely want to do this down the line, hopefully there isn't a lot of on/off when I'm just filling tires, but I agree that limiting it is a good idea.

    I had not thought of the PVC pipe, that's a good idea, and may make it easier to put a tank or two in smaller places.

    The 88p was pretty cheap, but also has a good duty cycle (25 min at 30psi. Most of the other portable compressors are either very pricey (for the 100% duty cycle) or don't have as good numbers, but cost essentially the same.

    Hmm, I'll have to keep an eye out for that, hopefully I don't run into that problem, but I'll definitely stash some extra fuses in the truck.
     
    ExplorHer likes this.
  10. May 3, 2017 at 7:20 AM
    #10
    DizzyZ

    DizzyZ Well-Known Member

    Joined:
    Jun 21, 2010
    Member:
    #39284
    Messages:
    144
    Gender:
    Male
    First Name:
    Dennis
    Paragould, AR
    Vehicle:
    2017 Tacoma TRD Off Road
  11. May 3, 2017 at 8:27 AM
    #11
    PixelPusher

    PixelPusher Official Lurker

    Joined:
    May 26, 2016
    Member:
    #187985
    Messages:
    65
    Gender:
    Male
    First Name:
    Adam
    New Hampshire
    Vehicle:
    2013 Spruce Mica DCSB TRD-OR
    Bilstein 5100s @2.5" Deaver AAL
    I would not advise the use of PVC as a compressor vessel. PVC does not like to cycle pressure, and when it fails, IT FAILS!

    Think Fragmentation grenade.

    I used to go to a garage that had previously had PVC installed for air lines. There was a hole ripped in one of the walls where the air line had burst. PVC gets brittle after repeated pressure cycling and even more so in heat (say under a hood) I would not want to risk having a frag go off under the hood of my truck.

    YMMV, But you might want to consider the potential damage to surrounding areas if you go the PVC route.
     
  12. May 3, 2017 at 12:09 PM
    #12
    tamer

    tamer [OP] hamerworx.com

    Joined:
    Aug 21, 2008
    Member:
    #8674
    Messages:
    474
    Gender:
    Male
    SoCal
    Vehicle:
    Taco No More
    Any tank I mount will be under the bed, away from the engine and away from the exhaust. But point taken. I think the small tanks are pretty cheap anyways.
     
    PixelPusher likes this.
  13. May 24, 2017 at 6:46 AM
    #13
    PintSize

    PintSize Crossthreaded & torqued down

    Joined:
    Jun 16, 2016
    Member:
    #189793
    Messages:
    2,358
    Gender:
    Male
    Texas
    Vehicle:
    2011 2.7L 5 spd RC 4x4
    Nice work :thumbsup:
     
    tamer [OP] likes this.
  14. May 24, 2017 at 6:41 PM
    #14
    nat103

    nat103 Well-Known Member

    Joined:
    Nov 27, 2016
    Member:
    #203450
    Messages:
    455
    Gender:
    Male
    KY
    Vehicle:
    2017 DCSB OR
    Maybe i missed it but is there a switch in the cab to turn the compressor on or do you just use the switch on the compressor when you pop the hood?

    @tamer
     
  15. May 24, 2017 at 6:50 PM
    #15
    steezinstangl

    steezinstangl Well-Known Member

    Joined:
    Sep 10, 2012
    Member:
    #86667
    Messages:
    432
    Gender:
    Male
    First Name:
    Ryan
    Elk Grove, Ca
    Vehicle:
    2008 FJ Cruiser
    Mini H1 Retrofit 5K, 1st Gen TRD CAI, JBA Catback, Radflo 2.5 extended coilovers w/ resis, Radflo 2.5 rear shocks with resis, toytec superflex rear springs, DSM Uniball UCA's, intake manifold spacer
    I don't believe he used a switch in the cab. Funny you asked that though because I'm thinking about buying all the parts he listed but actually trying to put a switch in the cab for the compressor haha.
     
  16. May 24, 2017 at 6:54 PM
    #16
    Rudyp.27

    Rudyp.27 Well-Known Member

    Joined:
    Feb 4, 2017
    Member:
    #209621
    Messages:
    1,054
    Gender:
    Male
    First Name:
    Rudy
    Nipomo, Ca
    Vehicle:
    2015 DCSB TRD SPORT
    Fox 2.5 Factory Series Coil-Over Reservoir (Front) Fox 2.0 Performance Series IFP (Rear) Method "Mesh" 17x8.5|6x5.50|0/4.75" wheels
    subd for sure. been wanting to do this for mine for a while
     
    tamer [OP] likes this.
  17. May 24, 2017 at 7:04 PM
    #17
    Arlaghan

    Arlaghan Well-Known Member

    Joined:
    Dec 5, 2016
    Member:
    #204138
    Messages:
    491
    Gender:
    Male
    First Name:
    Alex
    Redmond, WA
    Vehicle:
    2017 Red TRD Off-Road
  18. May 24, 2017 at 8:38 PM
    #18
    tamer

    tamer [OP] hamerworx.com

    Joined:
    Aug 21, 2008
    Member:
    #8674
    Messages:
    474
    Gender:
    Male
    SoCal
    Vehicle:
    Taco No More
    I did not use a switch in the cab, I just use the switch on the compressor. I did this for two reasons,

    1) I have to pop the hood to get to the NPT Quick-release regardless
    2) I don't have an aux fuse block yet, and I didn't want to wire up something super complicated without that. When I do get the fuse block installed I'm going to go back and clean up the wiring and hard wire this thing to a switch in the cab.
     
  19. May 26, 2017 at 12:18 PM
    #19
    steezinstangl

    steezinstangl Well-Known Member

    Joined:
    Sep 10, 2012
    Member:
    #86667
    Messages:
    432
    Gender:
    Male
    First Name:
    Ryan
    Elk Grove, Ca
    Vehicle:
    2008 FJ Cruiser
    Mini H1 Retrofit 5K, 1st Gen TRD CAI, JBA Catback, Radflo 2.5 extended coilovers w/ resis, Radflo 2.5 rear shocks with resis, toytec superflex rear springs, DSM Uniball UCA's, intake manifold spacer
    good call. I don't have an aux fuse box either. It would probably be a good idea for me to get one though.
     
    tamer [OP] likes this.
  20. May 28, 2017 at 12:08 AM
    #20
    igno1tus

    igno1tus How does this site know about everyone's member ?

    Joined:
    Apr 15, 2017
    Member:
    #216359
    Messages:
    1,238
    Lehigh Valley Area , PA
    Vehicle:
    '07 Tacoma Access Cab TRD Off Road
    Awesome write up ! I have the 88p also and it's a great compressor .
     
    tamer [OP] likes this.
To Top