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Old 07-07-2011, 10:08 AM   #15
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IF you dont need to run airtools the Viair 450P is a potent 12 V unit.

Its very popular with offroaders that need to air up and down 35" tires all the time and it had a great reputation as a reliable device.

Good for 150PSI and 100% Duty cycle you clamp it onto your battery.

I got tired of carrrying a full compressor around just for tires.

Comes with a nice bag.


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Old 07-07-2011, 12:19 PM   #16
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You need to decide in no particular order:
1. How much you want to spend (110V Craftsman etc are quite a bit cheaper)
2. 12 Volt or 110 V
3. Compressor/tank combo or seperate compressor and mount air tank remotely

I opted for the Viair because it is 12 volt, can mount anywhere/position and once installed, the only hookup is the air hose. Viair also sells a mounting plate if you don't have a compartment floor to mount on that fits the setup very nice. VIAIR PN: 95901 Compressor Mounting Plate in Stock. The cost is $49.90 + $0.00 S/H (Continental U.S.Only). Used one of those on my SIL's F350 to mount behind cab and under bed. As stated before, if you go with the Viair select one that has the PSI and duty cycle. If you constantly abuse the duty cycle it will probably not last. My duty cycle is 50% and is going on 3 years and works very reliable for air horns, ATV tires, MH Tires, and occasionally inflatable queen mattress bed but that takes about 3 refills/cycles to refill air tank with about 15-20 minutes cool down after second cycle.
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Old 07-07-2011, 12:38 PM   #17
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The AC powered compressors are hands down the best, they are are relatively inexpensive (under $120) and produce good air flow at high pressure (over 120 psi). Their downside; they are bulkier and heavier (20 to 40 lbs) than the DC compressors and require AC power to be available. This is not usually a problem for Class A motor homes because of their generators.

If you don't have a generator, or are short on storage space, the DC compressor is the ticket. They can be inexpensive ($90), but the compressors in the price range will have a low duty cycle and a low air flow, especially at high pressures like 90 psi. They claim it can inflate a full size truck tire in 4 minutes, but that is a pickup truck tire not a 22.5 RV tire, and the truck tire takes 45 psi, not 90+ psi.

As the DC compressor price increases, the capability goes up. The most important parameter is the air flow or Cubic Feet/Minute (CFM). A lot of the specs do not even list the air flow, nor do they show the curve of air flow; which decreases as the pressure goes up.

An aside; one compressor is listed as 2.54 CFM at zero pressure and nothing else. This is useless info, because it means this compressor would be effective at inflating your air mattress!!!! I want to know the CFM at 50 and 90 psi. I am picking on this compressor because the manufacturer actually has a chart on their website with this info. The Via Air 400P does 2.54 CFM at 0 psi, 1.7 CFM at 50 psi, 1.41 CFM at 90 psi, 1.09 CFM at 120 psi. Another gotcha, this is at 13.8 volts so the engine better be running. BTW this is a $200 compressor with a 33% duty cycle.

At the high end (above $500) there is the Warn VTC compressor that has an integrated 1 gallon air tank (also acts as cooler) and is capable of 8 CFM @ 100 psi. They have a smaller one that is capable of 4 CFM @ 100 psi. These are heavy also.

You can also get engine driven compressors, but their installed price is around $1500. We can get them cheaper in the offroad industry because there are kits for our vehicles and we often install them ourselves. An RV would require custom brackets and fitting. For example see: ::Kilby Enterprises::

I have no affiliation with Quadratec, but you can visit their site and query "air compressor". Search Results - Quadratec

I have rambled too long.
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Old 07-07-2011, 12:43 PM   #18
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Quote:
Originally Posted by born2camp View Post
You need to decide in no particular order:
1. How much you want to spend (110V Craftsman etc are quite a bit cheaper)
2. 12 Volt or 110 V
3. Compressor/tank combo or seperate compressor and mount air tank remotely

I opted for the Viair because it is 12 volt, can mount anywhere/position and once installed, the only hookup is the air hose. Viair also sells a mounting plate if you don't have a compartment floor to mount on that fits the setup very nice. VIAIR PN: 95901 Compressor Mounting Plate in Stock. The cost is $49.90 + $0.00 S/H (Continental U.S.Only). Used one of those on my SIL's F350 to mount behind cab and under bed. As stated before, if you go with the Viair select one that has the PSI and duty cycle. If you constantly abuse the duty cycle it will probably not last. My duty cycle is 50% and is going on 3 years and works very reliable for air horns, ATV tires, MH Tires, and occasionally inflatable queen mattress bed but that takes about 3 refills/cycles to refill air tank with about 15-20 minutes cool down after second cycle.
This is very good information.....to complete this information, what model of VIAIR compressor did you get?
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Old 07-07-2011, 12:48 PM   #19
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Viair is the best setup IMO....400prv
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Old 07-07-2011, 01:47 PM   #20
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There is no "hands down best compressor" Like everything else, it needs to fit you and your needs and abilities. I would have gone with 110v but we are generally in wet locations for the ATV (either them or the ground) and I didn't want the risk of shock etc. Granted the ViAir is more expensive but I really am impressed with their ability to keep on going with the constant cycling and demands that I have put on mine. I do pay special attention to the duty cycle but I can get most things I need done within a 15-20 minute spread. If not, I figure it a good time for a water fight or fix something for the next ride. The ViAir I went with was the
ViAIR 380c Compressor 200psi 55% Duty Cycle Plug-n-Play Kit-2G Tank PN: 20007.
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Old 07-07-2011, 03:41 PM   #21
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Right now for my uses the Viair wins over my Ac powered unit on the road.

I have over 60 tires to maintain in my fleet of toys and this is the unit I reach for and travel with now.

The 450 is a strong little unit. From the viair website.


Performance Data
PSI CFM A BAR LPM A
0 1.66 11 0 47.0 11
10 1.55 12 1.0 42.0 13
20 1.41 13 2.0 38.5 14
30 1.34 15 3.0 36.5 16
40 1.31 16 4.0 34.0 17
50 1.27 16 5.0 30.5 18
60 1.18 17 6.0 28.0 18
70 1.09 18 7.0 26.5 19
80 1.04 18 8.0 25.0 19
90 0.97 18 9.0 23.0 18
100 0.94 19 10.0 21.0 18
110 0.90 19
120 0.86 19
130 0.81 18
140 0.76 18
150 0.72 18 *Supply Voltage: 13.8 Volts

Fill Rates

2.5 Gallon Tank Fill Rate
0 To 105 PSI 1 Min. 55 Sec.
85 To 105 PSI 28 Sec.
0 to 145 PSI 3 Min. 02 Sec.
110 to 145 PSI 59 Sec.

5.0 Gallon Tank Fill Rate
0 To 105 PSI 4 Min. 20 Sec.
85 To 105 PSI 58 Sec.
0 to 145 PSI 6 Min. 40 Sec.
110 to 145 PSI 2 Min. 11 Sec.

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Old 07-10-2011, 09:05 PM   #22
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craftsman 110V

I use a 110v craftsman 1.5 HP, 3 gal tank,
bought it to use on rentals, (trim work, etc) and race car at the drags.
I use an inverter to use it ANYWHERE, hook up to car battery, or coach batt, what ever, runs great, 3 yrs old now, no issues, and........
$109.95 !!!!!
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Old 07-11-2011, 08:14 AM   #23
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I've been using a DeWalt Emglo D55140 compressor (D55140 1 Gallon, 135 PSI Max, Trim Compressor | DEWALT Tools) for the past 3-1/2 years and have been very satisfied with its performance. It's fairly light (24 lbs) and relatively compact (19 " x 14.5" x 9"); I store it upright in the driver's side rear storage bay in my 08 Allegro Bay. I run my front tires at 100psi and the rears at 95psi; the compressor will put 5psi into a front tire in about 2 minutes which I find entirely acceptable.

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Old 10-08-2011, 10:15 AM   #24
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bumping, great conversations and recommendations
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Old 10-12-2011, 08:25 PM   #25
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Quote:
Originally Posted by cruzn57 View Post
I use a 110v craftsman 1.5 HP, 3 gal tank,
bought it to use on rentals, (trim work, etc) and race car at the drags.
I use an inverter to use it ANYWHERE, hook up to car battery, or coach batt, what ever, runs great, 3 yrs old now, no issues, and........
$109.95 !!!!!
Just bought one of these. Initial tests on tire work show it is up to the job.
Fits in basement bay crossways and is only 9 inches wide. I like the fact that it works in oil, as I've had trouble with some of the oil-less models in construction work.
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Old 10-16-2011, 05:23 PM   #26
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This isn't entirely appropriate since you don't have an onboard compressor. However, it might be an applicable, albeit expensive option for some readers.

My onboard compressor is not high enough for my front tires (120 lbs) nor for my roadbikes. Additionally as an active fulltimer the rig is full of outdoor gear with no available space.

The solution was the RV Air Booster distributed by Bob Dickman Tire Center (Les Schwab dealer) Junction City, OR. It is extremely compact and will double your on board air compressor pressure. It does not work slower as I first expected. Tried it before purchase.

I installed it between my diesel tank and the cargo bay door, where the compressor outlet is located, by removing the angle bar (screws) at the end of the diesel tank, cutting off an appropriate portion of the cushioning pad, then welding a plate to the bar. The mechanism was then bolted to the plate and the angle bar replaced. The entire unit is about 8" x 9" and 4.75 inches deep including the added plate.

An air hose long enough to reach the in-house compressor fitting and loop back to where your longer air hose is inserted completes the installation. The longer hose loop prevents crimping the line. This also keeps the fitting clean going down the road. To use move the booster hose to the compressor, attach your air line, and turn the valve. The MH needs to be running.

The downside - $500 - but almost no space requirement, it's light, and it's handy just behind the cargo door. (You could use it without permanently mounting it.)

After three years I've certainly gotten a payback through ease of use and no storage requirement. No regrets about the price.
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Old 10-16-2011, 05:46 PM   #27
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Quote:
Originally Posted by njs42 View Post
VIAIR Corporation - 12-volt & 24-volt - 200 PSi Air Suspension Compressors Look here.

I use VIAIR also---I have a constant duty compressor and 2-1/2 gallon tank and a fifty foot hose. The compressor came as a kit which I installed. A loud obnoxious air horn I threw in just for fun (on a gas rig). It handles 22.5 tires easily and is rated 150psi. I use constant duty because it does not require intermittent recovery time for heat bulid up. It is a 12v system and you can just get the VIAIR compressor and use it w/o a tank if you prefer.
Quote:
Originally Posted by Uncle Dave View Post
IF you dont need to run airtools the Viair 450P is a potent 12 V unit.

Its very popular with offroaders that need to air up and down 35" tires all the time and it had a great reputation as a reliable device.

Good for 150PSI and 100% Duty cycle you clamp it onto your battery.

I got tired of carrrying a full compressor around just for tires.

Comes with a nice bag.


Uncle Dave
Quote:
Originally Posted by GENECOP View Post
Viair is the best setup IMO....400prv


I use this one also a little expensive but it works

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Old 10-16-2011, 05:51 PM   #28
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I tried to upload a picture of the one I have on my last post so here we go again.

I have the same one Uncle Dave posted. I thought it would show up in the quote.







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