Micro Level ride control. Opened new twist to ground clearance.

[Bob Dunahugh]

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

 

[6cuda61]

Bob i think if you want faster "up" you need to put a tank in....a bigger compressor will help but will not be instant like a tank would be.
--
Rich Mondor,

Brockville, ON

77 Hughes 2600

 

[LQQKatJon]

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/

 

[Matt Colie]

> 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

 

[richshoop]

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

>

>> 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:

 

[Keith V]

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
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

 

[justin brady1]

A tank and a good Viair will solve the problem.
Yes the 1/4" air lines are a restriction but they aren't the problem the problem is the tiny little compressors that can't move any air and the lack
of a tank.
The tank is more important than the compressors.
Mine will go from on the ground to full up in 10-15 seconds . 1/4" air lines, viair 480 and a 2 gallon tank.
--
Justin Brady
http://www.thegmcrv.com/
1976 Palm Beach 455