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Home » Public Forums » GMCnet » Re: [GMCnet] Sullybilt Single bag Rear Suspension
Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241268] Mon, 24 February 2014 20:43 Go to next message
Jim Bounds is currently offline  Jim Bounds   United States
Messages: 842
Registered: January 2004
Karma: 0
Senior Member
Too bad you missed your opportunity at Coos Bay to tell us all about it.

I have had several of the "air bag plus 2 spacers at the shop.  I even rigged up one called it "big ole bag".  All of them ibcluding the one I put together would hold the ass of the coach up but still, when you drop a tire or the bag you are stopped with something needung to be done right then.  Have you checked the amplification of the lateral movement of the bag attaching points when the coach goes into a tight turn?  Same probkem as the "dual bag system, side motion is great.  Bags work well in 2 directions not 3.  What engineering was done, hold the bag between the arms and measure how thick the spacer/ adapter needs to be to reach the arms.

Cost is 1/2 that of a quad bag system, heck you get twice the number of air bags plus 100 pounds of carefully cut and welded 2 piece brackets that fit like a glove gold zinc plated just cause it could be.  There is a valve control manifold that costs $75 if you want one for a single bag system.  "So simple to install "  sounds like a cook on TV talking about how easy it is to whip up a meal.  Doesnt say much about his talents if all he prepares is easy stuff!  I would rather spend those big bucks on something that takes 3 people all day to cook.  I would not tout how easy it is to install.  I say it takes a selection of 3/4" wrenches and a few well placed cuss words to install a quad bag system, folks who have done it can speak about ease of install.  I prepare them with real comments.

Why do sone feel owning a GNC shoud be a dead heat to see how cheap t ou can be.  You totally get what you pay for.  You may have done well in yourcareer and t ou can afford to have a motorhome.  I can tell you no one here has a 401k or a bank account offshore.  If we water down our market with so many option fir sonethubf that its not profitable ror anyone.  One day there may be no retrofit air bag systems available.  You get tired or playing in this sand box, there's no money in it for you so yi ur deal goes away.  Dealers are trying to be here for the long haul.  No one c an say the quad bag system is flawed or not built well.  Why not get something that withstands the test if time.  Stop buying cheap, price is always a big consideration but it should not be the biggest selling ooint 

I say all of this and know, I do not build the quad bag, Jim K. does and has a pretty sizeable financial unvestment to bring it to market.   I just know it works, helped in the design to make more installer friendly, which it is.  Do not even argue there was more design put into anything but the quad bag system, just isn't so.

Jim Biunds

-------- Original message --------
From: Todd Sullivan <sgltrac@comcast.net>
Date: 02/24/2014 2:26 PM (GMT-05:00)
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Sullybilt Single bag Rear Suspension



Recent posts about pressure related issues and the Quadra Bag rear suspension system has prompted me to restate qualities of the Sullybilt rear suspension system which are core to the reasons for its development and success.

There is no need to change, adjust or replace ANY part of the existing air supply or metering hardware on a properly functioning coach system to utelize the Sullybilt sytem. The ONLY part which needs to be touched is the airspring itself.
If you have at least one oem airspring which will hold air then you already have a free spare to carry in the unlikely event you have an airspring failure. If a tire were to come apart and damage the airspring, the existing leftover oem bag can be reinstalled at the same time as the spare wheel and you are on your way. The complete Sullybilt sytem is removed as an assembly and the oem airspring put back in its place. No plumbing or ride height mechanical changes are required as the ride height is read by the oem sytem off of bogie arm movement not air pressure.

Installation of the Sullybilt system requires properly supporting the rear of the coach under or near the bogie box, depressurizing and removing the existing oem airspring and replacing it with the Sullybilt assembly. Often the most challenging part of the installation is removal of rusted T skirt fasteners (if coach is equipped with such) or frozen oem airspring fasteners.

The Sullybilt single airspring system operates at a much lower air pressure ( typically 35-60psi are the norm as compared to the oem sytems which see typical pressures over 100psi) which takes a lot of load off of existing compressor sytems which are "past their half life by now".

The Firestone W01-358-9294 which is used with the Sullybilt sytem has a HIGHER load rating than the oem airspring and thus likely a higher load rating than the currently produced copy of the oem airspring. The FI 9294 airspring also has an integrated internal rubber bump stop which can prevent undercarriage and wheel well damage in the event the motorhome is moved while an airbag is deflated or a sudden loss of pressure is experienced (catastrophic airspring failure) while underway.

Simplicity/oem like performance/ease of installation/dependability/low cost compared to other available systems.

Find out more at www.bdub.net/sully/

--
Sully
77 Royale
Seattle, wa
Future land speed record holder fully equipped motorhome (bucket list)
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Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241269 is a reply to message #241268] Tue, 25 February 2014 06:16 Go to previous messageGo to next message
WD0AFQ is currently offline  WD0AFQ   United States
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
Senior Member
Jim, I am with you on this. Back in 07 George D. Rolled into Rayne, La. with the side of his coach torn out. You know cause you were there. Right then and there I knew my new original type bags were coming off and the Q bag was going on. Have never regretted it. Lots of folks are ok with single bags but Teri and I are not "weekend" travelers. I always look for safety and reliability when doing something big to the GMC. Besides, I had a brand new paint job back then that cost a lot more than the Q bag setup.
People are free to choose what they want. I would never have thought there would be so many options. I just pray we continue to have vendors that can take care of folks that can't take care of themselves, like me.
Have a great day. Headed for another round of chemo as we speak.
Dan


3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer
Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241318 is a reply to message #241268] Tue, 25 February 2014 11:31 Go to previous messageGo to next message
sgltrac is currently offline  sgltrac   United States
Messages: 2797
Registered: April 2011
Karma: 1
Senior Member
I figured you could use as many time slots at coos bay as you could get Jim cause you have so much to say. It never ceases to amaze me how you react like a kicked dog when I post FACTS which depict attributes of the Sullybilt system.

Yes, when you lose a tire on any system you need to stop and do something. On the Sullybilt or oem you need to stop and change the tire.
If you lose an airbag on a Sullybilt system you can slow down and continue to a safe place to perform repairs. On the oem system you need to STOP WHERE YOU ARE AT THAT MOMENT and make repairs or risk body and undercarriage damage.
The oem system is one airbag with a lower rated weight carrying capacity than the Sullybilt airbag and is held to the bogie at one end only by a hollow pipe which doubles as the air inlet. The FI 9294 air spring on the Sullybilt system has an additional 1/2" grade 5 mounting stud integrated into a steel mounting plate on the fill port side of the air spring. This is straight from Firestone. The already stronger, higher capacity 9294 is mounted to 1/4" steel plate with 1/4" mounting brackets and assembled by a professional welder. ALL forces remain placed where they were with the oem system.

At $660 for the hot dipped galvanized set including typical cost of the Air springs, the Sullybilt system is closer to 1/3 of the price of the Quadra bag.

More airbags and the associated plumbing creates more potential failure/ leak points. I see no benefit in an additional 100 pounds of steel plate. I don't know what you mean about a $75 single bag control manifold. Are you talking about a shut off valve?

The system is very simple to install. I like your cooking reference but this is not about me or you or our talents. But if you want to draw comparisons, you remind me of a tv evangelical preacher. Just substitute fear of mechanical malfunction and safety for the devil and your touted products as salvation.

Jim K will sell anything off his GMC site if it is profitable and there is ABSOLUTELY NOTHING WRONG WITH THAT. he sells a far less robust and refined adaptation of a single bag system on his website for the same or more $than the Sullybilt. I don't see him complaining about watering down the GMC aftermarket.

I don't think anyone is claiming that a lot of design effort was not put into the Quadra bag. I don't know why you keep repeating that over and over again like you are being attacked. Just ain so. And you can preach until you have sold a blue million or are blue in the face and it will not change the fact that neither the Sullybilt system or the Quadra bag is for everyone. People want options.


Todd Sullivan

Sully
77 royale
Seattle

> On Feb 24, 2014, at 6:43 PM, gmccoop <gmccoop@yahoo.com> wrote:
>
> Too bad you missed your opportunity at Coos Bay to tell us all about it.
>
> I have had several of the "air bag plus 2 spacers at the shop. I even rigged up one called it "big ole bag". All of them ibcluding the one I put together would hold the ass of the coach up but still, when you drop a tire or the bag you are stopped with something needung to be done right then. Have you checked the amplification of the lateral movement of the bag attaching points when the coach goes into a tight turn? Same probkem as the "dual bag system, side motion is great. Bags work well in 2 directions not 3. What engineering was done, hold the bag between the arms and measure how thick the spacer/ adapter needs to be to reach the arms.
>
> Cost is 1/2 that of a quad bag system, heck you get twice the number of air bags plus 100 pounds of carefully cut and welded 2 piece brackets that fit like a glove gold zinc plated just cause it could be. There is a valve control manifold that costs $75 if you want one for a single bag system. "So simple to install " sounds like a cook on TV talking about how easy it is to whip up a meal. Doesnt say much about his talents if all he prepares is easy stuff! I would rather spend those big bucks on something that takes 3 people all day to cook. I would not tout how easy it is to install. I say it takes a selection of 3/4" wrenches and a few well placed cuss words to install a quad bag system, folks who have done it can speak about ease of install. I prepare them with real comments.
>
> Why do sone feel owning a GNC shoud be a dead heat to see how cheap t ou can be. You totally get what you pay for. You may have done well in yourcareer and t ou can afford to have a motorhome. I can tell you no one here has a 401k or a bank account offshore. If we water down our market with so many option fir sonethubf that its not profitable ror anyone. One day there may be no retrofit air bag systems available. You get tired or playing in this sand box, there's no money in it for you so yi ur deal goes away. Dealers are trying to be here for the long haul. No one c an say the quad bag system is flawed or not built well. Why not get something that withstands the test if time. Stop buying cheap, price is always a big consideration but it should not be the biggest selling ooint
>
> I say all of this and know, I do not build the quad bag, Jim K. does and has a pretty sizeable financial unvestment to bring it to market. I just know it works, helped in the design to make more installer friendly, which it is. Do not even argue there was more design put into anything but the quad bag system, just isn't so.
>
> Jim Biunds
>
> -------- Original message --------
> From: Todd Sullivan <sgltrac@comcast.net>
> Date: 02/24/2014 2:26 PM (GMT-05:00)
> To: gmclist@temp.gmcnet.org
> Subject: [GMCnet] Sullybilt Single bag Rear Suspension
>
>
>
> Recent posts about pressure related issues and the Quadra Bag rear suspension system has prompted me to restate qualities of the Sullybilt rear suspension system which are core to the reasons for its development and success.
>
> There is no need to change, adjust or replace ANY part of the existing air supply or metering hardware on a properly functioning coach system to utelize the Sullybilt sytem. The ONLY part which needs to be touched is the airspring itself.
> If you have at least one oem airspring which will hold air then you already have a free spare to carry in the unlikely event you have an airspring failure. If a tire were to come apart and damage the airspring, the existing leftover oem bag can be reinstalled at the same time as the spare wheel and you are on your way. The complete Sullybilt sytem is removed as an assembly and the oem airspring put back in its place. No plumbing or ride height mechanical changes are required as the ride height is read by the oem sytem off of bogie arm movement not air pressure.
>
> Installation of the Sullybilt system requires properly supporting the rear of the coach under or near the bogie box, depressurizing and removing the existing oem airspring and replacing it with the Sullybilt assembly. Often the most challenging part of the installation is removal of rusted T skirt fasteners (if coach is equipped with such) or frozen oem airspring fasteners.
>
> The Sullybilt single airspring system operates at a much lower air pressure ( typically 35-60psi are the norm as compared to the oem sytems which see typical pressures over 100psi) which takes a lot of load off of existing compressor sytems which are "past their half life by now".
>
> The Firestone W01-358-9294 which is used with the Sullybilt sytem has a HIGHER load rating than the oem airspring and thus likely a higher load rating than the currently produced copy of the oem airspring. The FI 9294 airspring also has an integrated internal rubber bump stop which can prevent undercarriage and wheel well damage in the event the motorhome is moved while an airbag is deflated or a sudden loss of pressure is experienced (catastrophic airspring failure) while underway.
>
> Simplicity/oem like performance/ease of installation/dependability/low cost compared to other available systems.
>
> Find out more at www.bdub.net/sully/
>
> --
> Sully
> 77 Royale
> Seattle, wa
> Future land speed record holder fully equipped motorhome (bucket list)
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Sully 77 Royale basket case. Future motorhome land speed record holder(bucket list) Seattle, Wa.
Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241327 is a reply to message #241318] Tue, 25 February 2014 12:24 Go to previous messageGo to next message
ljdavick is currently offline  ljdavick   United States
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
Senior Member
I bought the four bag system and when it's time to replace it (it might be a ticking time-bomb) I will probably go with the Syllybag system as it offers the biggest bang for the buck, so to speak. I know that Jim K will offer to sell his Quadra-bag system piece by piece saving me some money, but even that is still more expensive than this Sullybuilt system.

Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241336 is a reply to message #241327] Tue, 25 February 2014 13:32 Go to previous messageGo to next message
Jim Bounds is currently offline  Jim Bounds   United States
Messages: 842
Registered: January 2004
Karma: 0
Senior Member
See, please don't take this personal Larry but giving a cheap option, it's human nature to want to try.  I buy tools at Harbour Freight all the time--- why, because the tools are cheap!  If they were not down the street I would be forced to do the right thing and buy good tools.  They are close but I still do not buy the "cheapest" they have-- that's junk!  Why go through it all unless you like to, just buy it and put it in.  If you say it's too expensive, think what it will cost in gas just to get it put together.  Someone has already wasted their time putting it together-- it's done so buy it -- help yourself and the community.  Don't rig up 1 bag, be good to yourslef and make your life easier.
 
Just the truth,
 
Jim Bounds
-----------



On Tuesday, February 25, 2014 1:25 PM, Larry Davick <ljdavick@comcast.net> wrote:

I bought the four bag system and when it's time to replace it (it might be a ticking time-bomb) I will probably go with the Syllybag system as it offers the biggest bang for the buck, so to speak. I know that Jim K will offer to sell his Quadra-bag system piece by piece saving me some money, but even that is still more expensive than this Sullybuilt system.

Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
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Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241366 is a reply to message #241327] Tue, 25 February 2014 17:35 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Larry,

Your 4 bag system is not going to blow up! Er, well a bag might but I wouldn't be concerned with that. ;-)

There MANY 4 bag systems made by Leigh Harrison on GMCs and I thought I would address the weakness of that system that I am aware of
as noted on the GMCnet.

1) The system is made of 1/4" steel and is not strong enough as it flexes under load.

2) The plate that supports the front (middle wheel) bag bends when encountering high loads such as a pothole which Leigh denies. I
believe that is because if he did admit it was a problem he would have to provide a fix.

3) The system takes more than the OEM pressure to operate which places additional strain on the compressor.

My observations on those comments:

1) I have yet to read of anyone that has had a 4 bag system failure caused by using 1/4" steel.

2) This is a documented problem but relatively simple to solve.

a) Weld additional 3/8' spacers in between the front and rear bag supports at 10 - 2 - 6 o'clock before installing the system.

b) On an installed system fabricate a wooden spacer like the one below and place it between the bag support plates

http://www.gmcmhphotos.com/photos/g6534-l-harrison-4-bag-rear-suspension.html
To install this block you must remove the bags from the upright supports and screw the air fittings on the front and rear bags
ALL
THE WAY IN and point them straight down or they will hit each other.

3) The bags are mounted directly to the bogie upright arms but because the OD is smaller than the OEM bags they do take more
pressure to operate, however, I have never heard of any bag blowing up. You can replace one of the standard Firestone W01-358-3400
bag with Firestone P/N W21-358-7325 bag (thanks Karen). Doing so will lower the pressure required; IIRC Dave Lenzi told me it
reduced the pressure required in his Royale to 105 psi.

If I have left out any weaknesses in the 4 bag system please feel free to comment.

As you can see I have not compared this system with any of the other systems because I don't want to get into a S#!T fight. ALL of
them have pro's and con's.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426

-----Original Message-----
From: Larry Davick

I bought the four bag system and when it's time to replace it (it might be a ticking time-bomb) I will probably go with the Syllybag
system as it offers the biggest bang for the buck, so to speak. I know that Jim K will offer to sell his Quadra-bag system piece by
piece saving me some money, but even that is still more expensive than this Sullybuilt system.

Larry

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241371 is a reply to message #241268] Tue, 25 February 2014 17:58 Go to previous messageGo to next message
Luvn737s is currently offline  Luvn737s   United States
Messages: 1106
Registered: June 2007
Karma: 2
Senior Member
I think there should be room for an "OEM" (or reasonably close) and an Upgraded version of most components. The Single Cone is about as close as you can get to the OEM spring and that's what I went with. I don't like welded parts being subjected to the vibration and shock loading that suspension components get. Some folks like additional features and the Quad Bag seems to provide those. But there are other hacked-together airbag systems that are aimed at the lowest price point and I think that marketing such devices is irresponsible. No one needs a motorhome and such toys are always able to wait their turn in the budget until you can afford the proper item (when they are a critical safety device).

In the airplane world we are facing a very similar trend that we see in the Classic GMC world. Airplanes were purchased by the Baby Boomers who have aged out of their ability to fly and maintain their planes. Thus the market is littered with hundreds if not thousands of airplanes in various states of dereliction. They have gone too far for the next generation to invest in bringing them back so the remaining market is so small that parts and service prices are getting astronomical.

Coaches need to be kept in a reasonable state of repair if we hope to interest the next generation and have the infrastructure we enjoy today to support them tomorrow.


Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241416 is a reply to message #241336] Tue, 25 February 2014 20:21 Go to previous messageGo to next message
ljdavick is currently offline  ljdavick   United States
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
Senior Member
A couple of comments for both Jim B and Rob M.

I bought the 4-Bag system as I thought it was a quality improvement over the OEM replacement (they were still available at the time) and I liked the idea of having both bogies connected. My concern at the time was that the Quadra-Bag might make the ride harsher.

My concerns were unfounded.

Later when we learned that the hinged mount for the bags was insufficient due to bogie flex I was concerned, but on further reflection I didn't panic. I have true-trackers on both front and rear bogies and it's my feeling that this will keep them from flexing excessively and thereby extend the life of the 4-Bag. I think this is a reasonable assumption, and so far, I've been right (damn - I shouldn't have said that.)

Now regarding Todd Sullivan's Sullybags - although I have zero experience with them I understand from what I've read that they are an excellent replacement solution. Perhaps by the time I need\want to replace my 4-Bag system there will be other options too. All I've read commends Sully's workmanship and the Firestone bag he recommends is certainly rated for service in excess of our coach's needs. A bag of air affixed to each bogie is what the General designed, so this should do the trick. Furthermore the lower air pressure needed may improve the ride, though the reduced travel might impair campsite leveling, while protecting us from the bottoming out trouble of OEM.

If I were flush with cash I'd probably upgrade to the Quadra-Bag. I'd also buy the reaction arms, Eagle wheels, 1-Ton front end, a smoking paint job... well you get the idea. I'm not flush with cash - our priority at the moment is getting our girl through college and lavishing $$ on the motorhome isn't in the cards.

You all make very good points and have experience and reasoning to back them up. You just don't have my particular circumstances that lead me to my conclusions. As Jim says It's America - I can do what I want!


Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241424 is a reply to message #241416] Tue, 25 February 2014 21:20 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Larry,

Oops!

I forgot about the four bag system designed by Chuck Aulgur and sold by JimK. The reason I forgot about it is probably because JimK
stopped selling it due to problems that arose with the center support.

Once again I will decline comment on any of the systems other than to say I am happy with the Leigh Harrison 4 Bag system on The
Blue Streak and the OEM System on Double Trouble.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426

-----Original Message-----
From: Larry Davick

A couple of comments for both Jim B and Rob M.

I bought the 4-Bag system as I thought it was a quality improvement over the OEM replacement (they were still available at the time)
and I liked the idea of having both bogies connected. My concern at the time was that the Quadra-Bag might make the ride harsher.

My concerns were unfounded.

Later when we learned that the hinged mount for the bags was insufficient due to bogie flex I was concerned, but on further
reflection I didn't panic. I have true-trackers on both front and rear bogies and it's my feeling that this will keep them from
flexing excessively and thereby extend the life of the 4-Bag. I think this is a reasonable assumption, and so far, I've been right
(damn - I shouldn't have said that.)

Now regarding Todd Sullivan's Sullybags - although I have zero experience with them I understand from what I've read that they are
an excellent replacement solution. Perhaps by the time I need\want to replace my 4-Bag system there will be other options too. All
I've read commends Sully's workmanship and the Firestone bag he recommends is certainly rated for service in excess of our coach's
needs. A bag of air affixed to each bogie is what the General designed, so this should do the trick. Furthermore the lower air
pressure needed may improve the ride, though the reduced travel might impair campsite leveling, while protecting us from the
bottoming out trouble of OEM.

If I were flush with cash I'd probably upgrade to the Quadra-Bag. I'd also buy the reaction arms, Eagle wheels, 1-Ton front end, a
smoking paint job... well you get the idea. I'm not flush with cash - our priority at the moment is getting our girl through
college and lavishing $$ on the motorhome isn't in the cards.

You all make very good points and have experience and reasoning to back them up. You just don't have my particular circumstances
that lead me to my conclusions. As Jim says It's America - I can do what I want!
--
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241443 is a reply to message #241424] Wed, 26 February 2014 01:40 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
Senior Member
You need to know one thing, the Quadra Bag has ben out there for over 5
years.
Please do not think of it as a mire bag replacement , as it is not.
Once you use he Q Bag system, one will see that the handling will become
better.
We have never had a filer or any related defect.
From what I know about the puncture of the air bag on the one in Southern
CA it was on a single bag unit, the extension vertically of the air fitting
was high enough to come in contact with the fitting when the bag folded
over the end.
Again it was not a Quadra Bag system.


On Tue, Feb 25, 2014 at 7:20 PM, Robert Mueller <robmueller@iinet.net.au>wrote:

> Larry,
>
> Oops!
>
> I forgot about the four bag system designed by Chuck Aulgur and sold by
> JimK. The reason I forgot about it is probably because JimK
> stopped selling it due to problems that arose with the center support.
>
> Once again I will decline comment on any of the systems other than to say
> I am happy with the Leigh Harrison 4 Bag system on The
> Blue Streak and the OEM System on Double Trouble.
>
> Regards,
> Rob M.
> Sydney, Australia
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
>
> -----Original Message-----
> From: Larry Davick
>
> A couple of comments for both Jim B and Rob M.
>
> I bought the 4-Bag system as I thought it was a quality improvement over
> the OEM replacement (they were still available at the time)
> and I liked the idea of having both bogies connected. My concern at the
> time was that the Quadra-Bag might make the ride harsher.
>
> My concerns were unfounded.
>
> Later when we learned that the hinged mount for the bags was insufficient
> due to bogie flex I was concerned, but on further
> reflection I didn't panic. I have true-trackers on both front and rear
> bogies and it's my feeling that this will keep them from
> flexing excessively and thereby extend the life of the 4-Bag. I think
> this is a reasonable assumption, and so far, I've been right
> (damn - I shouldn't have said that.)
>
> Now regarding Todd Sullivan's Sullybags - although I have zero experience
> with them I understand from what I've read that they are
> an excellent replacement solution. Perhaps by the time I need\want to
> replace my 4-Bag system there will be other options too. All
> I've read commends Sully's workmanship and the Firestone bag he recommends
> is certainly rated for service in excess of our coach's
> needs. A bag of air affixed to each bogie is what the General designed,
> so this should do the trick. Furthermore the lower air
> pressure needed may improve the ride, though the reduced travel might
> impair campsite leveling, while protecting us from the
> bottoming out trouble of OEM.
>
> If I were flush with cash I'd probably upgrade to the Quadra-Bag. I'd
> also buy the reaction arms, Eagle wheels, 1-Ton front end, a
> smoking paint job... well you get the idea. I'm not flush with cash - our
> priority at the moment is getting our girl through
> college and lavishing $$ on the motorhome isn't in the cards.
>
> You all make very good points and have experience and reasoning to back
> them up. You just don't have my particular circumstances
> that lead me to my conclusions. As Jim says It's America - I can do what
> I want!
> --
> Larry Davick
> A Mystery Machine
> 1976(ish) Palm Beach
> Fremont, Ca
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
Re: [GMCnet] Sullybilt Single bag Rear Suspension [message #241458 is a reply to message #241443] Wed, 26 February 2014 07:58 Go to previous message
WD0AFQ is currently offline  WD0AFQ   United States
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
Senior Member
jimk wrote on Wed, 26 February 2014 01:40

You need to know one thing, the Quadra Bag has ben out there for over 5
years.
Please do not think of it as a mire replacement.

--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Yea, mine will have been installed 7 years this coming June. Not one regret on going the quadra bag way. Maybe I need to start carrying a replacement. Not sure how long these bags are good for running 75 pounds of air in them.
Dan


3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer
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