Reply
 
Thread Tools Display Modes
 
Old 04-03-2013, 02:01 AM   #1
Senior Member
 
Join Date: Dec 2009
Posts: 582
Power Tank

I've discussed Power Tank as an option for on-board air in a couple of threads. After some more experimentation and time of ownership, a few thoughts specific to SMB.

1. Power Tank will fill your tires significantly faster than anything else. By far. Period.

2. That being said, because of the higher pressures required on the SMB, a 10 pound tank doesn't last long. In fact, my experiments have shown that you are lucky to air back up to SMB recommended pressures twice with one 10 pound tank. The 20 pound tank should be considered a minimum. Better yet, two 10 pound tanks so you know one is full...

3. The tanks need to be re-certified every 5 years. That's not on the website. At least not that I saw. My tank is out being re-certified now. When I get it back I will post the expense.

4. Re-filling the tank isn't hard or expensive, but it isn't easy or cheap either. You need to find a welding supply shop. Their most common response is, "We swap out the tanks." Your most common response is, "Yea, but I paid a BUNCH of money for this shiny powder coated one. I'd like to keep it."

Bottom line: It works fantastic for my Jeep with 35" tires only filling to 32-35 psi. It doesn't have the capacity we need to go to 80 psi.
__________________

__________________
Current: 2014 15 Passenger V8
Former: 2009 SMB 4x4 6.0
TwoVans is offline   Reply With Quote
Old 04-03-2013, 10:41 AM   #2
Senior Member
 
Tapatio's Avatar
 
Join Date: Nov 2010
Location: California
Posts: 999
Garage
Re: Power Tank

How much do people charge to refill a 20lb tank? I'm guessing a good quality compressor is cheaper over the long run. Still very happy with my ARB twin compressor.

viewtopic.php?f=13&t=8056
__________________

__________________
2006 E350 6.0PSD 5R110, SMB 4X4, RB-50, ARB lockers front/rear, Aluminess galore, AMP steps.
Callsign KK6GIY
Tapatio is offline   Reply With Quote
Old 04-03-2013, 11:08 AM   #3
Senior Member
 
AndrewST's Avatar
 
Join Date: Sep 2008
Location: Switzerland soon back to Oregon
Posts: 733
Re: Power Tank

Other option is diving tank, but it also needs to be filled up...
__________________
2009 E350 window RB 6.0 PSD Quadvan 4x4 with EB pop top
2003 E350 ambulance 7.3 PSD Quigley
2007 Jeep JK for local offroad
AndrewST is offline   Reply With Quote
Old 04-03-2013, 12:25 PM   #4
Senior Member
 
Jeffrey's Avatar
 
Join Date: Apr 2007
Location: Santa Barbara, CA
Posts: 1,587
Garage
Re: Power Tank

Don't fill at a welding shop. I fill mine at the local soda fountain distributor from their huge CO2 tank for about $15.
__________________
'07 RB-50 - My Photo Site -- K1JGS --
Jeffrey is offline   Reply With Quote
Old 04-03-2013, 12:37 PM   #5
Site Team
 
daveb's Avatar
 
Join Date: May 2007
Location: Turlock Ca
Posts: 9,683
Garage
Re: Power Tank

According to Power Tank when I talked with them several months back, A 10 lb tank will take 4-315/75-r16 tires from 25 lbs to 75lbs with some left over. So that should fill a set of 285's to 80 lbs w/o a problem. Not saying I'd never drop below 25 ibs per tire on a 12,000 pound vehicle, but I've never had to go that low and I think the 315's are a 65lb max pressure anyway. I'd like to have a emergency backup to my extreme air. Besides, they look great and are beautiful tanks worth keeping them pollished and waxed. Now where is the real estate to mount it? I still have to find a place for the Maxtrax
__________________
2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer

Sportsmobile 4X4 Adventures..........On and off road adventures
daveb is offline   Reply With Quote
Old 04-03-2013, 03:04 PM   #6
Senior Member
 
Join Date: May 2007
Location: East Bay CA
Posts: 989
Re: Power Tank

Quote:
Originally Posted by Jeffrey
Don't fill at a welding shop. I fill mine at the local soda fountain distributor from their huge CO2 tank for about $15.
Dunno 'bout that. I fill mine for about $17 here in the Bay Area. Swapping tanks is much less of a hassle than having to get it filled; an ugly one works as well as a shiny one, and no waiting. And any welding place will do it (you can also check fire extinguisher places). Some shops just don't wanna hassle with taking time to fill an itty bitty one off tank, so again you may be better off in a welding shop. Or if you're lucky, your home brew shop. Make sure the tank has a recent hydro test.

The price for the Power Tanks seems rather high. A 20 Lb tank new is gonna be about $150, a regulator maybe up to $125, and some miscellaneous fittings and whatnot is still gonna be cheaper, and not hard to build with some air fittings from the hardware store or Harbor Freight. But even then it's gonna cost more in the long run than an air compressor, although there might be other benefits; for example, use as an on-board fire extinguisher, soda water maker, beer carbonator, MIG welding. But I just carry a bike CO2 inflator for some of that.
__________________
2001 Ford E250 Sportsmobile with Salem-Kroger 4x4 conversion
rob_gendreau is offline   Reply With Quote
Old 04-03-2013, 09:40 PM   #7
Senior Member
 
Join Date: Dec 2009
Posts: 582
Re: Power Tank

Quote:
Originally Posted by daveb
According to Power Tank when I talked with them several months back, A 10 lb tank will take 4-315/75-r16 tires from 25 lbs to 75lbs with some left over. So that should fill a set of 285's to 80 lbs w/o a problem.
That is what I have found. AND is exactly my point why it doesn't work for me for the SMB. I want to be able to air up and down several times without support. The 10 lb tank handles this task just fine at Jeep pressures. But, with the SMB pressures it is a one shot deal.

As much as I love the speed of the Power Tank and its ability to put a tire on the bead, I want multiple runs. Luckily, it is a sunk cost for me and I have a mount on my trailer, so space is not an issue. But, if I was starting from scratch (or if some money falls in my lap), these considerations would push me to an on-board air compressor for the SMB application.
__________________
Current: 2014 15 Passenger V8
Former: 2009 SMB 4x4 6.0
TwoVans is offline   Reply With Quote
Old 04-03-2013, 09:53 PM   #8
Site Team
 
daveb's Avatar
 
Join Date: May 2007
Location: Turlock Ca
Posts: 9,683
Garage
Re: Power Tank

I agree but for me (provided I want to add more weight to an already heavy van ) a backup would be nice. I might just get a 2nd small electric but there are times where I want to air up fast and a one shot power tank would give me that option. Sometimes I avoid airing down just because of the time to fill up!
__________________
2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer

Sportsmobile 4X4 Adventures..........On and off road adventures
daveb is offline   Reply With Quote
Old 04-04-2013, 12:49 PM   #9
Senior Member
 
Join Date: May 2007
Location: East Bay CA
Posts: 989
Re: Power Tank

I dunno how heavy your van is, but you might be able to go to tires that don't require 80 lbs. Going to 60 is gonna take less time to fill. But if you're already too heavy that won't help, bummer.

Although the CO2 is gonna be twice as fast as the best 12v compressors we're still talking a matter of minutes probably. And more stuff to futz with, since we seem to be concluding you'd still need a compressor (as with repeated fillings of a tire going down).

Perhaps the best way to justify it is if it's multiuse. CO2 is nice for air tools if you don't have a really powerful compressor and/or tank since it's got real oomph. And if you like beer, build a keezer and you've got a reason to use it at home.
__________________
2001 Ford E250 Sportsmobile with Salem-Kroger 4x4 conversion
rob_gendreau is offline   Reply With Quote
Old 04-04-2013, 01:14 PM   #10
Senior Member
 
Viejo's Avatar
 
Join Date: Feb 2010
Location: Arcata, CA
Posts: 617
Re: Power Tank

I've just finished putting together a DIY Power Tank system.

Here's the parts...



The costs were....
$105... 10lb Tank (from Beveragefactory.com) inc. tax & shipping
$54..... Fixed 125lb regulator from local welding supply
$7....... Quick connect fitting
$26..... ARB inflator
$13..... 45lb scale
$0...... Air hose (had one on hand)
====
$205

I also got an ARB deflator tool. In a quick test on 2 tires, it only takes about 1 min to drop a 315/75-16 tire from 60 to 40lbs.
Inflation is almost as fast. Airing back up used 1lb of CO2 which would give me about 4 cycles with a little safety margin.

The only part I might have wanted to go to Power Tank for would be a high capacity regulator. Mine was getting pretty frosty after 2 tires, not sure how fast it will do all 4. I'll leave that for a field experiment.

The tank cost $21 to fill at the local fire extinguisher service company. No problem getting the same tank back.
__________________

__________________
2002 E350 7.3 PSD
Quigley 4x4, EB50 floorplan
Viejo is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 06:54 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.