Home » Public Forums » GMCnet » viair (viair)
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| Re: viair [message #359561 is a reply to message #359560] |
Sun, 18 October 2020 13:55   |
dsmithy
Messages: 210
Registered: July 2012
Location: Lincoln Nebraska
Karma: 0
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Senior Member |
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Larry,
I ran the stock Dana on my '73 for years, including after I installed one of JimK's quadrabag systems. I ran it with the pressure switch set to 90--120psi and never had any problems with it. I have since switched to a Vair because I think it's a little more robust, but the whole thing has been trouble free. I'm unclear on your suggestion of more psi.
Douglas & Virginia Smith,
dsmithy18 at gmail,
Lincoln Nebraska,
’73 “Sequoia” since ‘95: "Wanabizo";
Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy wheels/Sundry other
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| Re: viair [message #359562 is a reply to message #359561] |
Sun, 18 October 2020 14:11 |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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dsmithy wrote on Sun, 18 October 2020 13:55Larry,
I ran the stock Dana on my '73 for years, including after I installed one of JimK's quadrabag systems. I ran it with the pressure switch set to 90--120psi and never had any problems with it. I have since switched to a Vair because I think it's a little more robust, but the whole thing has been trouble free. I'm unclear on your suggestion of more psi.
My system was set at 90-120lbs when I put the 4bag on. The 4bag runs down the road at normal height at 110lbs. So when I get to a camp site, and go to raise for leveling, since the 110lbs in the bag is so close to what is waiting in the reservoir, the compressor won't come on unless I let some air out of the system to 90lbs That then allows me to run it up to 120lbs. But then 120 is not enough for full extension. So, I set the off at 150 and found that at times I still had times when the bags pressure of 115 was at the reservoir pressure of 115, and would still not come on. For now, I am just letting some air out of the reservoir so I can go to 150. Hoping at sometime in the future to go with a 2 gallon reservoir and maybe up to 175. JWID
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: viair [message #359565 is a reply to message #359562] |
Sun, 18 October 2020 14:36 |
rjw
Messages: 697
Registered: September 2005
Karma: 4
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Senior Member |
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Larry wrote on Sun, 18 October 2020 15:11dsmithy wrote on Sun, 18 October 2020 13:55Larry,
I ran the stock Dana on my '73 for years, including after I installed one of JimK's quadrabag systems. I ran it with the pressure switch set to 90--120psi and never had any problems with it. I have since switched to a Vair because I think it's a little more robust, but the whole thing has been trouble free. I'm unclear on your suggestion of more psi.
My system was set at 90-120lbs when I put the 4bag on. The 4bag runs down the road at normal height at 110lbs. So when I get to a camp site, and go to raise for leveling, since the 110lbs in the bag is so close to what is waiting in the reservoir, the compressor won't come on unless I let some air out of the system to 90lbs That then allows me to run it up to 120lbs. But then 120 is not enough for full extension. So, I set the off at 150 and found that at times I still had times when the bags pressure of 115 was at the reservoir pressure of 115, and would still not come on. For now, I am just letting some air out of the reservoir so I can go to 150. Hoping at sometime in the future to go with a 2 gallon reservoir and maybe up to 175. JWID
What you describe was also an annoying problem for me. I also have a quadrabag system. To solve it, I installed a pressure regulator and set it to 125 and the reservoir pressure to 150. That seems to have solved the problem for me. However, it seems with quadrabag I can't raise the coach as much as I used to with the OEM system. Maybe that is my imagination. Maybe I should up the regulator pressure, but I am concerned about over pressurizing the bags. Maybe that is unfounded.
Richard
76 Palm Beach
SE Michigan
www.PalmBeachGMC.com
Roller Cam 455, TBI+EBL, 3.42 FD, 4 Bag, Macerator, Lenzi (brakes, vacuum system, front end stuff), Manny Tranny, vacuum step, Tankless + OEM water heaters.
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| Re: viair [message #359566 is a reply to message #359565] |
Sun, 18 October 2020 15:04 |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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rjw wrote on Sun, 18 October 2020 14:36Larry wrote on Sun, 18 October 2020 15:11dsmithy wrote on Sun, 18 October 2020 13:55Larry,
I ran the stock Dana on my '73 for years, including after I installed one of JimK's quadrabag systems. I ran it with the pressure switch set to 90--120psi and never had any problems with it. I have since switched to a Vair because I think it's a little more robust, but the whole thing has been trouble free. I'm unclear on your suggestion of more psi.
My system was set at 90-120lbs when I put the 4bag on. The 4bag runs down the road at normal height at 110lbs. So when I get to a camp site, and go to raise for leveling, since the 110lbs in the bag is so close to what is waiting in the reservoir, the compressor won't come on unless I let some air out of the system to 90lbs That then allows me to run it up to 120lbs. But then 120 is not enough for full extension. So, I set the off at 150 and found that at times I still had times when the bags pressure of 115 was at the reservoir pressure of 115, and would still not come on. For now, I am just letting some air out of the reservoir so I can go to 150. Hoping at sometime in the future to go with a 2 gallon reservoir and maybe up to 175. JWID
What you describe was also an annoying problem for me. I also have a quadrabag system. To solve it, I installed a pressure regulator and set it to 125 and the reservoir pressure to 150. That seems to have solved the problem for me. However, it seems with quadrabag I can't raise the coach as much as I used to with the OEM system. Maybe that is my imagination. Maybe I should up the regulator pressure, but I am concerned about over pressurizing the bags. Maybe that is unfounded.
Find out what the "Burst" pressure on the bags is. That, I would think, should give you an idea what your max pressure could be. JWIT
Larry
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: [GMCnet] viair [message #359568 is a reply to message #359566] |
Sun, 18 October 2020 15:14 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Sounds to me like a parking problem. Maybe you need to find a Walmart lot
that is more level than the ones you are using. (Grin) You can accomplish
the same thing by lowering the other side. Just a suggestion. On the quad
bag systems that I have worked on, they seem to not raise as high as a
stock system by about 3/4". But, the shocks limit the height. If you reach
the end of their travel you are done.
Jim Hupy
Salem, Oregon
On Sun, Oct 18, 2020, 1:05 PM Larry via Gmclist
wrote:
> rjw wrote on Sun, 18 October 2020 14:36
>> Larry wrote on Sun, 18 October 2020 15:11
>>> dsmithy wrote on Sun, 18 October 2020 13:55
>>>> Larry,
>>>> I ran the stock Dana on my '73 for years, including after I
> installed one of JimK's quadrabag systems. I ran it with the pressure switch
>>>> set to 90--120psi and never had any problems with it. I have since
> switched to a Vair because I think it's a little more robust, but the whole
>>>> thing has been trouble free. I'm unclear on your suggestion of more
> psi.
>>>
>>> My system was set at 90-120lbs when I put the 4bag on. The 4bag runs
> down the road at normal height at 110lbs. So when I get to a camp site,
>>> and go to raise for leveling, since the 110lbs in the bag is so close
> to what is waiting in the reservoir, the compressor won't come on unless I
>>> let some air out of the system to 90lbs That then allows me to run it
> up to 120lbs. But then 120 is not enough for full extension. So, I set the
>>> off at 150 and found that at times I still had times when the bags
> pressure of 115 was at the reservoir pressure of 115, and would still not
> come
>>> on. For now, I am just letting some air out of the reservoir so I can
> go to 150. Hoping at sometime in the future to go with a 2 gallon reservoir
>>> and maybe up to 175. JWID
>>
>> What you describe was also an annoying problem for me. I also have a
> quadrabag system. To solve it, I installed a pressure regulator and set it
>> to 125 and the reservoir pressure to 150. That seems to have solved the
> problem for me. However, it seems with quadrabag I can't raise the coach
>> as much as I used to with the OEM system. Maybe that is my
> imagination. Maybe I should up the regulator pressure, but I am concerned
> about over
>> pressurizing the bags. Maybe that is unfounded.
>
> Find out what the "Burst" pressure on the bags is. That, I would think,
> should give you an idea what your max pressure could be. JWIT
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] viair [message #359569 is a reply to message #359566] |
Sun, 18 October 2020 16:16 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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Looking up the specifications on the air springs will make for an interesting read.
I’m looking at a number of data sheets right now on “common” convoluted air springs.
I’m not seeing more than 100 PSI recommended.
https://www.mrostop.com/media/uploads/firestone_pdfs/W01-358-6947.pdf
This covers the air spring (Firestones term) that I’m using on my coach (Ferrara Bags).
No, I won’t make the comment I wanted to — but, Air Springs Matter.
Dolph
DE AD0LF
Wheeling, West Virginia
1977 26’ ex-PalmBeach
Howell EFI & EBL, Reaction Arms, Manny Transmission
“The Aluminum and Fiberglass Mistress”
|[ ]~~~[][ ][] \
"--OO--[]---O-"
> On Oct 18, 2020, at 4:04 PM, Larry via Gmclist wrote:
>
> rjw wrote on Sun, 18 October 2020 14:36
>> Larry wrote on Sun, 18 October 2020 15:11
>>> dsmithy wrote on Sun, 18 October 2020 13:55
>>>> Larry,
>>>> I ran the stock Dana on my '73 for years, including after I installed one of JimK's quadrabag systems. I ran it with the pressure switch
>>>> set to 90--120psi and never had any problems with it. I have since switched to a Vair because I think it's a little more robust, but the whole
>>>> thing has been trouble free. I'm unclear on your suggestion of more psi.
>>>
>>> My system was set at 90-120lbs when I put the 4bag on. The 4bag runs down the road at normal height at 110lbs. So when I get to a camp site,
>>> and go to raise for leveling, since the 110lbs in the bag is so close to what is waiting in the reservoir, the compressor won't come on unless I
>>> let some air out of the system to 90lbs That then allows me to run it up to 120lbs. But then 120 is not enough for full extension. So, I set the
>>> off at 150 and found that at times I still had times when the bags pressure of 115 was at the reservoir pressure of 115, and would still not come
>>> on. For now, I am just letting some air out of the reservoir so I can go to 150. Hoping at sometime in the future to go with a 2 gallon reservoir
>>> and maybe up to 175. JWID
>>
>> What you describe was also an annoying problem for me. I also have a quadrabag system. To solve it, I installed a pressure regulator and set it
>> to 125 and the reservoir pressure to 150. That seems to have solved the problem for me. However, it seems with quadrabag I can't raise the coach
>> as much as I used to with the OEM system. Maybe that is my imagination. Maybe I should up the regulator pressure, but I am concerned about over
>> pressurizing the bags. Maybe that is unfounded.
>
> Find out what the "Burst" pressure on the bags is. That, I would think, should give you an idea what your max pressure could be. JWIT
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
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| Re: [GMCnet] viair [message #359570 is a reply to message #359568] |
Sun, 18 October 2020 16:33 |
rjw
Messages: 697
Registered: September 2005
Karma: 4
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Senior Member |
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James Hupy wrote on Sun, 18 October 2020 16:14Sounds to me like a parking problem. Maybe you need to find a Walmart lot
that is more level than the ones you are using. (Grin) You can accomplish
the same thing by lowering the other side. Just a suggestion. On the quad
bag systems that I have worked on, they seem to not raise as high as a
stock system by about 3/4". But, the shocks limit the height. If you reach
the end of their travel you are done.
Jim Hupy
Salem, Oregon
I pretty much have learned how to park in unlevel sites. It is not as much a problem as it used to be. If I do have a severe unlevel site, I get out the jack hooks and bottle jacks, or the leveling blocks I carry. I can get it level most places. I did try higher pressure but was concerned about breaking something.
Richard
76 Palm Beach
SE Michigan
www.PalmBeachGMC.com
Roller Cam 455, TBI+EBL, 3.42 FD, 4 Bag, Macerator, Lenzi (brakes, vacuum system, front end stuff), Manny Tranny, vacuum step, Tankless + OEM water heaters.
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| Re: viair [message #359574 is a reply to message #359562] |
Sun, 18 October 2020 17:41 |
dsmithy
Messages: 210
Registered: July 2012
Location: Lincoln Nebraska
Karma: 0
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Senior Member |
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Larry,
I actually do exactly as you do with driving/leveling. I just assumed that bleeding air to start the compressor was normal operation. Sigh.
Douglas & Virginia Smith,
dsmithy18 at gmail,
Lincoln Nebraska,
’73 “Sequoia” since ‘95: "Wanabizo";
Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy wheels/Sundry other
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| Re: [GMCnet] viair [message #359597 is a reply to message #359569] |
Mon, 19 October 2020 11:25 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Dolph,
Page 14 in the link you sent goes into load and pressure suggestions. Looks
like 100psi for two ply bags and 175 for four ply.
Sully
Bellevue wa
On Sun, Oct 18, 2020 at 2:17 PM Dolph Santorine via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Looking up the specifications on the air springs will make for an
> interesting read.
>
> I’m looking at a number of data sheets right now on “common” convoluted
> air springs.
>
> I’m not seeing more than 100 PSI recommended.
>
> https://www.mrostop.com/media/uploads/firestone_pdfs/W01-358-6947.pdf https://www.mrostop.com/media/uploads/firestone_pdfs/W01-358-6947.pdf>
>
> This covers the air spring (Firestones term) that I’m using on my coach
> (Ferrara Bags).
>
> No, I won’t make the comment I wanted to — but, Air Springs Matter.
>
>
> Dolph
>
> DE AD0LF
>
> Wheeling, West Virginia
>
> 1977 26’ ex-PalmBeach
> Howell EFI & EBL, Reaction Arms, Manny Transmission
>
> “The Aluminum and Fiberglass Mistress”
>
> |[ ]~~~[][ ][] \
> "--OO--[]---O-"
>
>> On Oct 18, 2020, at 4:04 PM, Larry via Gmclist
> wrote:
>>
>> rjw wrote on Sun, 18 October 2020 14:36
>>> Larry wrote on Sun, 18 October 2020 15:11
>>>> dsmithy wrote on Sun, 18 October 2020 13:55
>>>> > Larry,
>>>> > I ran the stock Dana on my '73 for years, including after I installed
> one of JimK's quadrabag systems. I ran it with the pressure switch
>>>> > set to 90--120psi and never had any problems with it. I have since
> switched to a Vair because I think it's a little more robust, but the whole
>>>> > thing has been trouble free. I'm unclear on your suggestion of more
> psi.
>>>>
>>>> My system was set at 90-120lbs when I put the 4bag on. The 4bag runs
> down the road at normal height at 110lbs. So when I get to a camp site,
>>>> and go to raise for leveling, since the 110lbs in the bag is so close
> to what is waiting in the reservoir, the compressor won't come on unless I
>>>> let some air out of the system to 90lbs That then allows me to run it
> up to 120lbs. But then 120 is not enough for full extension. So, I set the
>>>> off at 150 and found that at times I still had times when the bags
> pressure of 115 was at the reservoir pressure of 115, and would still not
> come
>>>> on. For now, I am just letting some air out of the reservoir so I can
> go to 150. Hoping at sometime in the future to go with a 2 gallon reservoir
>>>> and maybe up to 175. JWID
>>>
>>> What you describe was also an annoying problem for me. I also have a
> quadrabag system. To solve it, I installed a pressure regulator and set it
>>> to 125 and the reservoir pressure to 150. That seems to have solved
> the problem for me. However, it seems with quadrabag I can't raise the
> coach
>>> as much as I used to with the OEM system. Maybe that is my
> imagination. Maybe I should up the regulator pressure, but I am concerned
> about over
>>> pressurizing the bags. Maybe that is unfounded.
>>
>> Find out what the "Burst" pressure on the bags is. That, I would think,
> should give you an idea what your max pressure could be. JWIT
>> --
>> Larry
>> 78 Royale w/500 Caddy
>> Menomonie, WI.
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: viair [message #359605 is a reply to message #359555] |
Mon, 19 October 2020 15:54 |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
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Senior Member |
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I solved the problem of being stuck between the desired pressure and the kick on pressure by adding a manually switched pump. It gives me a back up if one fails, and when the auto pump is content where it is and I am not - I just hit the manual one. Plus in the years where I have had a slow (day or two) leak, it gives me two to pump everything up from zero. I put the manual one on the house battery side, and left the auto pump on the switched ignition side like OEM.
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
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| Re: viair [message #359611 is a reply to message #359605] |
Mon, 19 October 2020 17:59 |
dsmithy
Messages: 210
Registered: July 2012
Location: Lincoln Nebraska
Karma: 0
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Senior Member |
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Tilerpep,
Good idea. That is exactly what I'll do, with the insertion of a 150psi limit switch.
I'm afraid that when I flip on the manual switch, in the busyness of parking/leveling/plugging in/pouring an adult beverage, I might forget it on so the Vair soldiers on forever.
Douglas & Virginia Smith,
dsmithy18 at gmail,
Lincoln Nebraska,
’73 “Sequoia” since ‘95: "Wanabizo";
Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy wheels/Sundry other
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