| [GMCnet] Micro Level ride control. Opened new twist to ground clearance. [message #366274] |
Sun, 22 August 2021 11:37  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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Put the system in back in February. Love the idea. Of reducing the risk. Of having gas splash back at me. At the gas pump. Or at the dump station. Getting the hoses set up. Then lowering the back. For better/faster draining. And gas filling. All from the hand held key fob. This has now. Got me looking for a larger air ride compressor. EL1. Got some brands, and part numbers?
Most of you. Have about 9 inches of frame to ground clearance, For the last 12 years. I've had to maintain about 2.5 to 3 inches when on the road. With our 78 Royale. Speed bumps, and driveways are examples of issues for me. I need faster UP.
Bob Dunahugh
78 Royale since 2003
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| Re: [GMCnet] Micro Level ride control. Opened new twist to ground clearance. [message #366287 is a reply to message #366274] |
Sun, 22 August 2021 17:28  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Buy the most cfm 100% duty 12v viair compressor you can find and want to pay for. Probably a 200 psi model.
425c comes to mind.
Opposite what others tend to say, i prefer a smaller air tank for air bag inflation speed. Like a 1/2 gallon tank max. At 100psi you are
Trying to inflate
A bag you want all the air going into the bag, not trying to inflate a tank and bag.
This is my experience between messing with a few coach’s that works best.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: [GMCnet] Micro Level ride control. Opened new twist to ground clearance. [message #366289 is a reply to message #366274] |
Sun, 22 August 2021 18:28 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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BobDunahugh wrote on Sun, 22 August 2021 12:37Put the system in back in February. Love the idea. Of reducing the risk. Of having gas splash back at me. At the gas pump. Or at the dump station. Getting the hoses set up. Then lowering the back. For better/faster draining. And gas filling. All from the hand held key fob. This has now. Got me looking for a larger air ride compressor. EL1. Got some brands, and part numbers?
Most of you. Have about 9 inches of frame to ground clearance, For the last 12 years. I've had to maintain about 2.5 to 3 inches when on the road. With our 78 Royale. Speed bumps, and driveways are examples of issues for me. I need faster UP.
Bob Dunahugh
78 Royale since 2003
Bob,
Funny you should bring that up. There is a new model of Viair compressor. The newer model is a 485C. If you dig out the specifications, it is better than the 480C in a number of ways. It does cost a little more and even more as I didn't order soon enough. I would have ordered already, but for the four day power outage, the water heater springing a leak and the barn door opener giving out. Some of those had higher priority.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| [GMCnet] Re: Micro Level ride control. Opened new twist to ground clearance. [message #366290 is a reply to message #366289] |
Sun, 22 August 2021 19:25 |
richshoop
Messages: 190
Registered: April 2017
Karma: 0
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Senior Member |
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Using pneumatics to move something is about VOLUME. You will need larger diameter tubing and fittings to appreciably increase speed of inflation of the air bags! Go back to the Norgren Valve catalog and note the orfice size of the valves. Add in the length of the urethane tubing with the flow friction coefficient. As you probably sense, it is not a matter of just replacing the compressor.
Sent from my iPhone
> On Aug 22, 2021, at 4:28 PM, Matt Colie wrote:
>
> BobDunahugh wrote on Sun, 22 August 2021 12:37
>> Put the system in back in February. Love the idea. Of reducing the risk. Of having gas splash back at me. At the gas pump. Or at the dump
>> station. Getting the hoses set up. Then lowering the back. For better/faster draining. And gas filling. All from the hand held key fob. This has
>> now. Got me looking for a larger air ride compressor. EL1. Got some brands, and part numbers?
>> Most of you. Have about 9 inches of frame to ground clearance, For the last 12 years. I've had to maintain about 2.5 to 3 inches when on
>> the road. With our 78 Royale. Speed bumps, and driveways are examples of issues for me. I need faster UP.
>> Bob Dunahugh
>> 78 Royale since 2003
>
> Bob,
>
> Funny you should bring that up. There is a new model of Viair compressor. The newer model is a 485C. If you dig out the specifications, it is
> better than the 480C in a number of ways. It does cost a little more and even more as I didn't order soon enough. I would have ordered already, but
> for the four day power outage, the water heater springing a leak and the barn door opener giving out. Some of those had higher priority.
>
> Matt
> --
> Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
> SE Michigan - Near DTW - Twixt A2 and Detroit
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| [GMCnet] Re: Micro Level ride control. Opened new twist to ground clearance. [message #366292 is a reply to message #366290] |
Sun, 22 August 2021 19:48 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Bob has an EL2, probably the worst design I can imagine, obviously designed by an accountant not an engineer,
It has 2 tiny compressors, no pressure limits ( in stock form, Bobs coach has an aftermarket limit)
The compressors are probably a bit worn but still... it's so SLOW. Literally hard to see if it's moving WITH a tape measure on the frame.
I have 1/4" tubing on my coach and when I hook it up to shop air it's fast. Up from fully deflated to all the way up in 10-15 seconds.
I have a ViAir 450c and it's a LOT slower 3x tp 5x slower. I want to put in a dual 850 system, no more nonsense.
The limit is definitely the air source, not the tubing.
Air tanks? I'm with Jonathan, 1 gallon is probably plenty, 1/2 is probably better, 2 gallon is probably useless.
FWIW, my shop air will come on when raising the coach from deflated, and it has a 50 gallon tank. How big do I need!
Why? because WHEN you bring the 2 gallon down below the pressure switch point you now have all the volume of the bag(s) PLUS the volume of the tank to fill to raise the coach. That big tank is just overhead.
With a small tank you canstill make small adjustments without running the compressor. and larger adjustments have less overhead.
I'd like a way to bypass the tank until ride height is reached and THEN fill it, Hmmmm
Valves also make a huge difference, my new valves are significantly faster than the old valves
________________________________
From: Rich Shoop
Sent: Sunday, August 22, 2021 7:25 PM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Re: Micro Level ride control. Opened new twist to ground clearance.
Using pneumatics to move something is about VOLUME. You will need larger diameter tubing and fittings to appreciably increase speed of inflation of the air bags! Go back to the Norgren Valve catalog and note the orfice size of the valves. Add in the length of the urethane tubing with the flow friction coefficient. As you probably sense, it is not a matter of just replacing the compressor.
Sent from my iPhone
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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