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Author Topic: Xterra On board air - Viair 400p - frame mounted behind wheel well  (Read 3005 times)

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Offline xterra07

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Here are some pictures and info about my onboard air system, switch on the outside and connects to an air hose.
This is using my Viair 400p compressor I had since 2015 and have been very happy with.
The new model of Viair 400p, Viair 400p auto has an "auto feature" which makes the compressor only come on when you put a load on it (connect hose to the tire and press the lever to start the flow). My 400p is always on when power goes to it.

I will use this setup for air to the tires, if you want to use any air tools, you would need air tanks.
With my spare tire still in place, I don't have the room, unless there was some custom welding done in the gaps along the frame.

The compressor is out of the way behind the wheel well, and away from plastic since all the metal gets burning hot when used for a while. After use I don't have to wait for the device to cool off, I can just drive off now.
That is a lot more user friendly than finding the compressor bag, opening the hood, connecting to the battery, hoping the coiled plastic hose reaches to the back... Then putting all away after the metal cools off.
----------------------

This month I had a Viair 400p welded onto the frame (the Viair 9500 bracket was welded, and the compressor bolted to it), high up behind the right wheel well, and so far so good.

1. Hose connection and On/Off switch


2. showing location relative to rear tire


3. leader hose (replaced from the original pipe inside a handle, because the end connector wasn't right for me) connects to rubber hose -- all the metal from the compressor until this connector gets super hot


4. Viair L bracket welded to the frame


5. Mounting (long) bolts showing with rubber Viair vibration absorbers


6. Husky 1/4 inch hose and ARB inflator/gauge




Parts:
* LED light switch $8 - https://www.amazon.com/gp/product/B01IT0VDLW/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
* Stainless steel quick connect Hose fitting 1/4" Coupling x 1/4" NPT  $7 - https://www.amazon.com/gp/product/B00835H2SM/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
* Viair 9500 mounting bracket (had to be custom cut to fit) $30 (low $20s if elsewhere) - https://www.amazon.com/Viair-95900-Compressor-Mounting-Bracket/dp/B00SUMNJ8U/ref=sr_1_2?keywords=viair+bracket&qid=1556131756&s=industrial&sr=1-2-catcorr
* Viair 400p air compressor ($180 for old, $210 for new "auto" model) - 33% duty cycle and 2.54 CFM - blows faster than 100% duty cycle models, but will get "tired" at some point (never for my purposes since 2015)
* Viair absorbing spacers for bracket mounting $9 - Switch Suspension in Mesa
* Loctite liquid to secure metal on metal threaded connections $20 - Switch Suspension in Mesa
* ARB Digital inflator with gauge $53 (there are cheap choices that fail, or skip the gauge and use manual one) - https://www.amazon.com/gp/product/B073RS57L5/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1


The installation:
* Rear right quarter panel plastic was taken off, including the mudflaps
* Viair 9500 bracket was partially cut to fit, welded to the frame
* Viair 400p was attached to the bracket with custom holes, using 1/2 inch viair vibration spacers (Switch Suspension has them, $9 for 4)
* Wires were run for the compressor under the inside trim (floor), 40am fuse early on, another wire for the switch... relay somewhere
* Work was done by a place in Mesa, took them a ridiculous 6 hours including mistakes and some poor choices, so I can't recommend them, also due to price. If you know someone who can weld, that's the biggest part of the project, rest is just running the right parts and de-coupling the compressor from plastic (by using a leader hose attached to a plastic hose)


Operation:
* Button only works when engine is on (or ignition is turned to the right) - I would only use it with engine on
* Blue light comes on with engine on
* Button turns on the compressor
* Rubber cover protects the connector by the switch
* 1/4" Home Depot hose with Quick connect couplers (always attached to that hose) connects to ARB digital gauge with 0.5 psi resolution, showing 33psi, 33.5psi...
* For backup I have my tiny cigarette lighter plugged in compressor from 20 years ago that saved me a few times, when the $40 Autozone compressors failed, but Viair never has. Viair has a lot more flow, airing up to 35psi in probably 5 minutes, as opposed to 20+ minutes with my old and other "toy" compressors

Links:
* Pitsnipe Calini bumper mount + 2x air tanks - http://www.azxterraclub.com/forum/index.php?topic=1294.135
* User prefers 33% duty cycle with higher CFM over 100% (2009) - https://www.thenewx.org/forum/29-gear-equipment/15440-board-air-set-up.html


I thought this would help someone, because onboard air is a useful tool offroad or on... pesky slow leaks, big temp changes which effect tire pressure, etc

Comments, ideas, thoughts?
« Last Edit: April 27, 2019, 04:04:58 PM by xterra07 »

Offline Thupertrooper (Victor)

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Re: Xterra On board air - Viair 400p - frame mounted behind wheel well
« Reply #1 on: April 24, 2019, 02:13:14 PM »
Awesome write up. I need to work on my setup. I have the 400p compressor also but Ill be installing it inside with just the air tank underneath due to mud.

Offline Stoic V

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Re: Xterra On board air - Viair 400p - frame mounted behind wheel well
« Reply #2 on: April 24, 2019, 06:15:51 PM »
Nice

Offline PitSnipe (Kyle)

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Re: Xterra On board air - Viair 400p - frame mounted behind wheel well
« Reply #3 on: April 26, 2019, 09:37:45 AM »
awesome write up. Great job and im glad that I was able to lend some advise.
Nine Time ToTM Winner. July 2013, December 2013, July 2014, December 2014, May 2015, August 2016, February 2017, September 2017, May 2019

Offline xterra07

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Re: Xterra On board air - Viair 400p - frame mounted behind wheel well
« Reply #4 on: April 27, 2019, 03:45:36 PM »
Did you have issues with mud, blocking the compressor operation?

Awesome write up. I need to work on my setup. I have the 400p compressor also but Ill be installing it inside with just the air tank underneath due to mud.

Offline xterra07

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Re: Xterra On board air - Viair 400p - frame mounted behind wheel well
« Reply #5 on: April 27, 2019, 03:50:37 PM »
Thanks Kyle, your input and pictures were very helpful. They also got met thinking about a tire holding rear bumper to fix my low hitch point and high tire location.

The pictures...



awesome write up. Great job and im glad that I was able to lend some advise.

Offline AZ Prospector

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Re: Xterra On board air - Viair 400p - frame mounted behind wheel well
« Reply #6 on: December 05, 2019, 08:05:04 AM »
very impressive install!

 



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