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Udo
Elite Nomad
Posts: 6353
Registered: 4-26-2008
Location: Black Hills, SD/Ensenada/San Felipe
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Mood: TEQUILA!
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AIR COMPRESSOR
Many of you have been waiting for this compressor to go on sale:
Now it has!
KIlo for kilo, the best and fastest 12 volt air compressor;
Udo
Youth is wasted on the young!
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Tioloco
Ultra Nomad
Posts: 3257
Registered: 7-30-2014
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If you are going to be relying on that in a remote place and need reliability, buy 2
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4x4abc
Ultra Nomad
Posts: 4302
Registered: 4-24-2009
Location: La Paz, BCS
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Mood: happy - always
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maybe for your moped
Harald Pietschmann
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Maderita
Senior Nomad
Posts: 671
Registered: 12-14-2008
Location: San Diego
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Udo,
Appreciate your posting of the sale price. Always good to know best pricing on gear.
However, the quality control, reliability, and design of this compressors is poor. It is easy to pull up the negative reviews on the Harbor Freight
web page.
Specifications can deceive. The "duty cycle" is not mentioned. A high percentage duty cycle is important when filling multiple offroad tires,
particularly in desert temperatures. I prefer 100% (continuous duty). When it comes to air flow rate, HF shows 1.35 CFM, but they neglect to state at
what PSI, rendering that spec as worthless. One must assume that it is at zero PSI.
The yellow coiled air hose is convenient. Until it breaks, which it will over time. Even some of the top brands come with a plastic air hose. I carry
a high-quality rubber hose, with the appropriate fittings. HF compressor owners have reported that they were unable to change hoses due to
incompatible fittings. It was said that the fittings are not NPT and may have a proprietary thread.
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mtgoat666
Select Nomad
Posts: 18759
Registered: 9-16-2006
Location: San Diego
Member Is Offline
Mood: Hot n spicy
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Udo,
Get the Viair. Looks like you are shopping harbor freight junk.
Woke!
“...ask not what your country can do for you – ask what you can do for your country.” “My fellow citizens of the world: ask not what America
will do for you, but what together we can do for the freedom of man.”
Prefered gender pronoun: the royal we
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4x4abc
Ultra Nomad
Posts: 4302
Registered: 4-24-2009
Location: La Paz, BCS
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Mood: happy - always
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most Viair are also junk
expensive junk
Harald Pietschmann
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woody with a view
PITA Nomad
Posts: 15939
Registered: 11-8-2004
Location: Looking at the Coronado Islands
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Mood: Everchangin'
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Udo, I’ve had this for five years with zero issues. Pay triple if you wish or just get a solid unit. Some people here continue to be special ed.
https://www.amazon.com/VIAIR-30033-300P-Portable-Compressor/...
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David K
Honored Nomad
Posts: 64942
Registered: 8-30-2002
Location: San Diego County
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I love my 'cheap' MV-50... fills 16"x 32" tires fast (3 minutes=15 psi gain). It hasn't failed (except once when I accidentally P-nched the tub while
it was running)!
I had the Harbor Freight one but the fuse got so hot it would melt (not blow)... It was a tiny bit faster doing about 6 psi per minute... But with the
fuse case getting so hot, it wasn't easy to fill all four without a break. The MV-50 has no such issues and was under $85.
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mtgoat666
Select Nomad
Posts: 18759
Registered: 9-16-2006
Location: San Diego
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Mood: Hot n spicy
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We are all waiting on the edge of our seats for you to enlighten us… what brand/model gets the seal of approval from Herr 4x4?
Woke!
“...ask not what your country can do for you – ask what you can do for your country.” “My fellow citizens of the world: ask not what America
will do for you, but what together we can do for the freedom of man.”
Prefered gender pronoun: the royal we
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4x4abc
Ultra Nomad
Posts: 4302
Registered: 4-24-2009
Location: La Paz, BCS
Member Is Offline
Mood: happy - always
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Quote: Originally posted by mtgoat666  |
We are all waiting on the edge of our seats for you to enlighten us… what brand/model gets the seal of approval from Herr 4x4?
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why would I do that?
Harald Pietschmann
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Lee
Ultra Nomad
Posts: 3543
Registered: 10-2-2006
Location: High in the Colorado Rockies
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Got 2 ViAirs, small and big, 20 years old, still works well. At the time it seemed like it was the brand to buy.
Deciding factor wouldn't be ''sale price,'' but specs.
DK's MV50 looks good for about $30. more.
US Marines: providing enemies of America an opportunity to die for their country since 1775.
What I say before any important decision.
F*ck it.
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Udo
Elite Nomad
Posts: 6353
Registered: 4-26-2008
Location: Black Hills, SD/Ensenada/San Felipe
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Mood: TEQUILA!
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I've had mine for about 15 years. I have used it many times. I love the high volume. I did have to replace the yellow air hose that came with it.
Udo
Youth is wasted on the young!
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PaulW
Ultra Nomad
Posts: 3086
Registered: 5-21-2013
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Compressor offerings have changed drastically since the last one I bought.
If you search Amazon for 12v portable compressors you will find laterally dozens of choices from low flow to extreme flow at high pressures..
Yup, the old Harbor freight one David has (2.02 CFM)works but the one Udo (1.35CFM) notes will also do the job.
For what it is worth Here are my compressors.
Honda - Viair 85P (1.83CFM) - Had it for a long time and it is ok for the small tires. Not price competitive to comparable offerings these days from
Amazon.
21' Jeep Rubicon 37" tires - Tozalazz double unit (11.65 CFM). Will inflate 4 tires from 15 to 40psi in 10+ minutes. See Amazon for the specs and the
reviews. I have had it for several years and now days there are more comparable choices.
18' F150 with stock tires - GSPSCN (2.47CFM) Another double compressor but with moderate flow. Again go to Amazon and see the specs and read the
reviews.
All compressors mentioned are made in China.
BTW my last VIAIR failed and it is not possible to get it repaired. Just a China made thing and a seller named VIAIR. Probably all compressors named
are the same, meaning not repairable.
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bajajoaquin
Junior Nomad
Posts: 60
Registered: 6-28-2011
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| Quote: Originally posted by David K | I love my 'cheap' MV-50... fills 16"x 32" tires fast (3 minutes=15 psi gain). It hasn't failed (except once when I accidentally P-nched the tub while
it was running)!
I had the Harbor Freight one but the fuse got so hot it would melt (not blow)... It was a tiny bit faster doing about 6 psi per minute... But with the
fuse case getting so hot, it wasn't easy to fill all four without a break. The MV-50 has no such issues and was under $85.
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The MV50 has been the inexpensive standard over at the Expo forum for a long time. There’s also a lot of chatter about the new dual-head version.
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PaulW
Ultra Nomad
Posts: 3086
Registered: 5-21-2013
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MV-50
Flow up to 2.54 CFM at 90 PSI. (72 lpm)
I found that after all these years it is still available at
https://superflowair.com/products/mv-50-air-compressor-1
Look at it and see if it looks the same.
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David K
Honored Nomad
Posts: 64942
Registered: 8-30-2002
Location: San Diego County
Member Is Online
Mood: Have Baja Fever
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The photo I posted (of the box image) is in your link, so yes.. the same one. Mine inflates my 265/75-16" Tacoma tires at the rate of 5 psi per minute
(going from 15 to 30 psi, in 3 minutes).
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pacificobob
Super Nomad
Posts: 2312
Registered: 4-23-2006
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The one specification missing from many underperforming compressors
Is CFM@ a given psi. Eg: 60psi. 90psi.
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RFClark
Super Nomad
Posts: 2463
Registered: 8-27-2015
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Mood: Delighted with 2024 and looking forward to 2025
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Places not to save $$$ if you go off road.
Tires
Gas cans
Winches
Tow straps
Li ion jump starter
Air compressors
Fire extinguishers
Emergency beacons
First aid kits
Things you think you’ll never need.
Dead man
Air bag jack
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PaulW
Ultra Nomad
Posts: 3086
Registered: 5-21-2013
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== =
The industry standard is to measure an quote the cfm at free flow.
CFM at a given pressure is meaningless unless the volume the flow is pushing into is defined. Some do it by specifying a tire size.
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David K
Honored Nomad
Posts: 64942
Registered: 8-30-2002
Location: San Diego County
Member Is Online
Mood: Have Baja Fever
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| Quote: Originally posted by PaulW |
== =
The industry standard is to measure an quote the cfm at free flow.
CFM at a given pressure is meaningless unless the volume the flow is pushing into is defined. Some do it by specifying a tire size.
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It would be great if the Nomads with various compressors also posted the actual time it takes to inflate their tires in real time.
With 16" truck tires (Tacoma, etc.)...
I measured the Coleman brand pump that plugs into a cigarette lighter: 2 psi per minute.
The next two, clip directly to the battery terminals:
Harbor Freight pump: 6 psi per minute (but melted fuse holder)
MV-50: 5 psi per minute.
For sand, I lower to an average of 15 psi (12-18) based on tire type, sand type, and the humidity. My current tires' street pressure is 34 psi.
3-ply sidewall tires need to go to 10 psi to float where 'cheaper' tires only need to drop to 15-18 psi.
To go from 15 psi to 34 psi (19psi added):
Harbor freight: just over 3 minutes per tire
MV-50: almost 4 minutes per tire
Coleman cig. lighter: almost 10 minutes per tire
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