Got my deflators, now I need a compressor...

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Chazz Layne
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Got my deflators, now I need a compressor...

#1

Post by Chazz Layne » Tue Jul 06, 2010 7:15 pm

Figured I'd post this here so we can all benefit from your expertise, Larry. :mrgreen:

Its time to add a compressor, but I'd like to keep it somewhat easy on the wallet. I'm willing to sacrifice speed to accomplish this, as I'm planning to add CO2 sometime in the future as my primary air source. I have just about zero knowledge of these devices, except that what I've seen/read about the Viair units impresses me. Here's my wants/needs:

- I'd like to stick to 100% duty-cycle models, since I have a bad habit of ignoring such things until the device in question catches fire.

- I'm not completely sure which lockers I'm going to go with down the road, but there is a possibility I'll want to run them off the compressor.

- If it doesn't blow the budget, I'd like the compressor to be able to fill an air tank as well (also to be added in the future).

- I'm guessing I'll need something that can do a remote/filtered intake and is well sealed, as the optimal mounting location (in terms if space) is the giant cavity above the rear axle where the anti-sway bar used to be.
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DennisDawg
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Re: Got my deflators, now I need a compressor...

#2

Post by DennisDawg » Tue Jul 06, 2010 7:27 pm

I just use an MV50, < 60 bucks, tires full of air and ready to roll! If I had an air locker (mine is electric), tanks and all, I'd do something else, but I don't, so the money goes to Boubon!
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Chazz Layne
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Re: Got my deflators, now I need a compressor...

#3

Post by Chazz Layne » Tue Jul 06, 2010 8:32 pm

There is a 50/50 chance I'll go electric on my lockers as well, I just have a hard time running something as fragile and hard to repair (compared to splicing some wires) as an air line someplace so vulnerable. The tank and air tools are definitely in my future though, especially seeing as I'm going to be starting over on tools anyhow...
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Re: Got my deflators, now I need a compressor...

#4

Post by 4WDHammer » Tue Jul 06, 2010 10:51 pm

I used one of the small, cheap, portable compressors for awhile. I Dont recall the brand. A small red one. Cost about $50 at Pep Boys. It filled the tires OK. A bit slow but not very durable. It gave up after a litte more than a year. Don't waste your money on one of these. I have ARB air lockers and use that compressor for all my needs now. I have also used CO2. Being a homebrewer of beer, I have CO2 on hand all the time. It works fine. Fills the tires fast, but is probably the most expensive way to go. Getting the tanks filled isn't cheap and I found that a full 10lb tank with >1,000 PSI will be nearly empty after filing 4 33" tires.

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Re: Got my deflators, now I need a compressor...

#5

Post by cruiserlarry » Wed Jul 07, 2010 12:25 am

I will try to post a more in-depth answer later, but some quick notes...

CO2 is the fastest method, with the exception of a belt driven compressor...

A 10lb liquid CO2 tank will fill my 33" tires from 15psi to 35psi about 30-40 times before it empties. ( You can go to www.powertank.com to see charts for fill capacities on different tank sizes and different tire sizes). I've been selling liquid Co2 tank systems for over 15 years, and they all do more than 4WDHammer reported...and refills for a 10lb tank run between $18-23...THey also have the ability to run air tools for about 3-6 minutes, which can be very useful on the trail.

VIAIR makes excellent compressors - and a lot of different models - so it can get very confusing. Duty Cycle, CFM output, physical size, and amp draw, are all variables to consider before you decide on one. Some compressors are designed for filling tanks (lower duty cycle, separate pressure regulator switch), while others are better able to work directly to fill tires, etc (higher duty cycle, higher output pressure).

Other brands, including Sun Performance (Quick-Air), Extreme Outback, and Master Flow all make models in a variety of sizes, outputs, and price ranges.

When I get a few minutes, I'll provide some more specific recommendations on what to look for in a 12v compressor for your vehicle...
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Re: Got my deflators, now I need a compressor...

#6

Post by jgorm » Wed Jul 07, 2010 10:57 am

I had a mv-50 mounted in my last jeep (stolen). It works well, but still takes 3-5 minutes to air up from 13 to 27 psi on 33s. I bought 2 of them for my current jeep and a 2.5 gallon air tank. I have yet to set them up because i want to lift the front fenders before i mount the pumps. for $65 its a great pump that will get the job done for cheap. I have a viair 400c in my truck with a tank. They look damn near identical to the mv-50 and the speed seems to be very similar.

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Chazz Layne
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Re: Got my deflators, now I need a compressor...

#7

Post by Chazz Layne » Wed Jul 07, 2010 12:28 pm

cruiserlarry wrote:VIAIR makes excellent compressors - and a lot of different models - so it can get very confusing. Duty Cycle, CFM output, physical size, and amp draw, are all variables to consider before you decide on one. Some compressors are designed for filling tanks (lower duty cycle, separate pressure regulator switch), while others are better able to work directly to fill tires, etc (higher duty cycle, higher output pressure).

When I get a few minutes, I'll provide some more specific recommendations on what to look for in a 12v compressor for your vehicle...
Hmm... well right now it'll need to handle tires directly, but down the road it will primarily just fill a tank (and perhaps lockers). I'm not sure if they make one that sits at a happy medium?

Another thing I might need to consider, it'll be filling my tires from 16 all the way up to 40 PSI (40 being optimum highway pressure under the weight of my truck).
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jgorm
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Re: Got my deflators, now I need a compressor...

#8

Post by jgorm » Wed Jul 07, 2010 1:52 pm

Chazz Layne wrote: Another thing I might need to consider, it'll be filling my tires from 16 all the way up to 40 PSI (40 being optimum highway pressure under the weight of my truck).
That's going to be a lot of air, especially if they are big tires!! Some guys convert a belt driven AC pump into an air pump. I think they blow 9 cfm. It would take some fab skills, piping, pressure switch, etc. The cheapest would be to get 2 MV50s (or one, but those suckers get super hot after 10 min). The "best" other than belt driven, or CO2 (if you don't mind filling the tank) would be a big viair setup like this. ~$500
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Willie H
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Re: Got my deflators, now I need a compressor...

#9

Post by Willie H » Wed Jul 07, 2010 2:43 pm

I'm going to put a vote up for the MV-50. Cheap, and small. I have filled my 32's from 18 to 40 in 110 degree heat with no problems. Not as fast as a CO2 set up, but gets the job done with a fraction of the space taken up. No matter the size of your rig, a CO2 bottle is going to take up some room. That is one thing to consider when you sleep inside the truck with another person.

The Viair is a great setup if you don't mind spending the money. Also, you can home brew your own res tank set up for less than half the cost.

I'll give you my 2cents on air-lockers too... Go electric or mechanical. Less parts for failure, and less (NO) plumbing to deal with. That is just MY opinion. If you can score some ARB's cheap heck an air locker is better than no locker.
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cruiserlarry
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Re: Got my deflators, now I need a compressor...

#10

Post by cruiserlarry » Wed Jul 07, 2010 2:55 pm

Chazz Layne wrote: Hmm... well right now it'll need to handle tires directly, but down the road it will primarily just fill a tank (and perhaps lockers). I'm not sure if they make one that sits at a happy medium?

Another thing I might need to consider, it'll be filling my tires from 16 all the way up to 40 PSI (40 being optimum highway pressure under the weight of my truck).
You will want a compressor capable of longer operating cycle, depending on its working pressure and cfm rate. Or a CO2 tank. The MV50, mentioned in another post, is a fine entry level unit, but will not handle that job for long, and will take a long time doing it while it can. One consideration is the actual space in the mounting location you choose. Longer duty cycle and higher output compressors tend to be physically larger (Almost all will have remote mount air intakes). Check out the VIAIR 450C; it will fill tires now, and work with a tank later, while providing 100% duty cycle and a good cfm rate for speed. Dimensional info is available on http://www.viaircorp.com - so you can make sure it will fit :mrgreen:
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