Home » Public Forums » GMCnet » Propane airbags
| Propane airbags [message #267741] |
Thu, 18 December 2014 00:57  |
mild bill
Messages: 98
Registered: November 2014
Location: Edmonton, Alberta, Canada
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So what do you think? Don't think the gas will hurt the rubber. Pretty much anything left in the tank and enough pressure. Big resivoir, fast bag fill. Save $200 on a compressor, what's the downside?
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| Re: Propane airbags [message #267743 is a reply to message #267741] |
Thu, 18 December 2014 01:52  |
cadelec
Messages: 303
Registered: September 2011
Location: Brisbane Australia
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maybe an explosion when a steel belt comes out of the tyre and cuts the bag. just 1 scenario i can think of kinda like a small hindenberg
Trevor
Brisbane Australia
Siesta Koala 76 Edgemont (old Bobby Moores)
71 Cadillac Eldo Convert
58 Cadillac Eldorado Brougham Project
[Updated on: Thu, 18 December 2014 01:54] Report message to a moderator |
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| Re: [GMCnet] Propane airbags [message #267746 is a reply to message #267741] |
Thu, 18 December 2014 05:30 |
Jeff Marten
Messages: 199
Registered: August 2013
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If you plan on using your coach in cold weather, plan on the tail dragging; propane pressure drops as the temperature drops. PV=nRT. At 32*F, you'll only have around 60psi, at 0*F around 30psi.
> Date: Wed, 17 Dec 2014 23:57:14 -0700
> To: gmclist@temp.gmcnet.org
> From: dolinskys@shaw.ca
> Subject: [GMCnet] Propane airbags
>
> So what do you think? Don't think the gas will hurt the rubber. Pretty much anything left in the tank and enough pressure. Big resivoir, fast bag
> fill. Save $200 on a compressor, what's the downside?
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1985 Gulf Stream 34' Sun Stream
1964 Falcon 'Vert
1980 Bradley GTE
1999 Chevy Tahoe
2005 Saab 93 Aero
1987 Suzuki Intruder 1400
1978 Glastron/Carlson CV23
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| Re: Propane airbags [message #267764 is a reply to message #267741] |
Thu, 18 December 2014 09:05 |
habbyguy
Messages: 896
Registered: May 2012
Location: Mesa, AZ
Karma: 3
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Y'all are thinking too small. Rig a microprocessor system that measures the current height, ambient temperature, and the calculated increase in bag pressure to reach the desired height. Then the system squirts in a tiny bit of propane, and an spark plug fires it. BANG - you're up to the desired ride height in a fraction of a second. Better, when you pull up to a low rider who's showing off his hydraulic suspension, making your 12,000 antique hot rod dance will show him who's REALLY boss!
Mark Hickey
Mesa, AZ
1978 Royale Center Kitchen
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| Re: [GMCnet] Propane airbags [message #267767 is a reply to message #267764] |
Thu, 18 December 2014 09:44 |
Mr ERFisher
Messages: 7117
Registered: August 2005
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Or just buy wireless air, from jim h. And you are done, no valves , no
computer
Erf
On Thursday, December 18, 2014, Mark wrote:
> Y'all are thinking too small. Rig a microprocessor system that measures
> the current height, ambient temperature, and the calculated increase in bag
> pressure to reach the desired height. Then the system squirts in a tiny
> bit of propane, and an spark plug fires it. BANG - you're up to the desired
> ride height in a fraction of a second. Better, when you pull up to a low
> rider who's showing off his hydraulic suspension, making your 12,000 antique
> hot rod dance will show him who's REALLY boss!
> --
> Mark Hickey
> Mesa, AZ
> 1978 Royale Center Kitchen
> _______________________________________________
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--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: Propane airbags [message #267769 is a reply to message #267741] |
Thu, 18 December 2014 10:17 |
mild bill
Messages: 98
Registered: November 2014
Location: Edmonton, Alberta, Canada
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Propane pressure 0 psi at -40 and blow off valve blows at 240 or .280 psi depending on whether it's considered an outside or enclosed tank.
-40 just hook a tiger torch up to the tank and warm it up!
The flam would be small to start but would get bigger!
[Updated on: Thu, 18 December 2014 10:23] Report message to a moderator |
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| Re: [GMCnet] Propane airbags [message #267770 is a reply to message #267764] |
Thu, 18 December 2014 10:14 |
GMC.LES
Messages: 505
Registered: April 2014
Karma: -2
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Wow, a dancing TZE. I can just imagine the looks you'd get if a coach was able to lift a front paw for a hand shake. I'd think the popping of the igniting propane might have everyone running for cover though.
Les Burt
Montreal
75 Eleganza
> On Dec 18, 2014, at 10:05 AM, Mark wrote:
>
> Y'all are thinking too small. Rig a microprocessor system that measures the current height, ambient temperature, and the calculated increase in bag
> pressure to reach the desired height. Then the system squirts in a tiny bit of propane, and an spark plug fires it. BANG - you're up to the desired
> ride height in a fraction of a second. Better, when you pull up to a low rider who's showing off his hydraulic suspension, making your 12,000 antique
> hot rod dance will show him who's REALLY boss!
> --
> Mark Hickey
> Mesa, AZ
> 1978 Royale Center Kitchen
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: Propane airbags [message #267775 is a reply to message #267741] |
Thu, 18 December 2014 11:02 |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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Mild Bill wrote on Wed, 17 December 2014 22:57So what do you think? Don't think the gas will hurt the rubber. Pretty much anything left in the tank and enough pressure. Big resivoir, fast bag fill. Save $200 on a compressor, what's the downside?
When I first read your post I was thinking you were going to put air in the empty tank. I was worried about smell. I think propane (or the smell they add) stinks.
Unless you were going to disable the auto level valves, the valves bleed off air. I wouldn't want propane bleeding off and I don't think I would like the smell of air from a propane tank being released.
All that being said, I do like the idea of a bigger tank. Our '74 has a one gallon and since getting the Sully style bags and Slaven valves, it sure will raise in a hurry. It is nice to see a steep entrance to a gas station or driveway and be able to raise the back in a few seconds.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: Propane airbags [message #267776 is a reply to message #267741] |
Thu, 18 December 2014 11:08 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Are you nuts? Don't drive that thing anywhere near me. I had to reread your username to make sure it wasn't "Mad" Bill.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: Propane airbags [message #267777 is a reply to message #267769] |
Thu, 18 December 2014 11:16 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Mild Bill wrote on Thu, 18 December 2014 08:17Propane pressure 0 psi at -40 and blow off valve blows at 240 or .280 psi depending on whether it's considered an outside or enclosed tank.
-40 just hook a tiger torch up to the tank and warm it up!
The flam would be small to start but would get bigger!
If you fill your tank in the south west in warm weather you will likely get a large butane mix. With this in the mix the tank pressure will be close to nothing below 32 degrees farenheight . A Canadian friend lost a freezer full of fish last winter in the Quartzite area when it got below freezing his freezer shut down. I told him he should have filled his empty tank in Canada not Arizona to be sure it was 100% propane. Anyway Bill I'm sure you are just joking.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Propane airbags [message #267782 is a reply to message #267776] |
Thu, 18 December 2014 11:32 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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When I install a wireless system in an early style coach equipped with a
front mounted compressor and large air tank, if the tank has been replaced
with a stainless steel one and a more modern compressor has been fitted, I
will sometimes install a hybrid wireless system. Using the existing tank,
compressor, and pressure switch, now controlled with a relay from the
wireless manifold. It eliminates the leaky dash valves and hose bundle, as
well as the hydraulic/pneumatic height control valves. There is a single
air line from the tank to the wireless manifold, and from the manifold to
each air bag. ride height is controlled by a wireless pressure transducer
combined with an operator controlled wireless remote control similar to a
garage door opener. The compressor and air tank still supply a large volume
of air to the manifold, just like before, but without all the potential for
leaks. Raise and lower times are as fast as before too. System seems to
hold up well in use.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Thu, Dec 18, 2014 at 9:08 AM, Chris Choffat wrote:
>
> Are you nuts? Don't drive that thing anywhere near me. I had to reread
> your username to make sure it wasn't "Mad" Bill.
> --
> -Chr$: Perpetual SmartAss
> Scottsdale, AZ
> 77 Ex-Kingsley 455 SOLD!
> 2010 Nomad 24 Ft TT W/ 390W PV, MPPT Controller, Honda EV4010 and custom
> cargo door.
>
> Photosite: Chrisc "It has Begun"
> _______________________________________________
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| Re: [GMCnet] Propane airbags [message #267786 is a reply to message #267767] |
Thu, 18 December 2014 14:09 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Mr ERFisher wrote on Thu, 18 December 2014 09:44Or just buy wireless air, from jim h. And you are done, no valves , no
computer
Erf
And upside down height control.
The wireless air system is worse than shut off valves
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: Propane airbags [message #267799 is a reply to message #267741] |
Thu, 18 December 2014 15:42 |
mild bill
Messages: 98
Registered: November 2014
Location: Edmonton, Alberta, Canada
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Just trying to create discussion, I do think a spark plug at the end of the dump line would look cool! Little puffs of flame!
Or driving through town at night you could jack up the bags and dump them for a longer flame duration!
And Bob, yeah starting! Costco run today $600 for stuff and $300 for booze. But booze is way more expensive up here.
[Updated on: Thu, 18 December 2014 15:51] Report message to a moderator |
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| Re: Propane airbags [message #267802 is a reply to message #267764] |
Thu, 18 December 2014 16:09 |
Joe Weir
Messages: 769
Registered: February 2013
Location: Columbia, SC
Karma: 7
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habbyguy wrote on Thu, 18 December 2014 09:05Y'all are thinking too small. Rig a microprocessor system that measures the current height, ambient temperature, and the calculated increase in bag pressure to reach the desired height. Then the system squirts in a tiny bit of propane, and an spark plug fires it. BANG - you're up to the desired ride height in a fraction of a second. Better, when you pull up to a low rider who's showing off his hydraulic suspension, making your 12,000 antique hot rod dance will show him who's REALLY boss!
I like the way you think...
76 Birchaven - "Wicked Mistress" - New engine, trans, alum radiator, brakes, Sully airbags, fuel lines, seats, adult beverage center... those Coachmen guys were really thinking about us second hand owners by including that beverage center...
Columbia, SC.
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