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Forum: GMCnet
 Topic: Microlevel for the EL11 systems (1978)
Re: Microlevel for the EL11 systems (1978) [message #329446 is a reply to message #329368] Fri, 23 February 2018 14:53
Scott Nutter is currently offline  Scott Nutter   United States
Messages: 389
Registered: January 2015
Location: Houston/San Diego
Karma:
Senior Member
After penciling this thing out and crunching some numbers, I think Keith is absolutely right.
Only one pump and no storage tank..........although the other systems would work just as good.

With one pump it's basically plug in and go.
With the tank system you would need a pressure switch, pressure relief valve, and drain valve. Then the wiring to the pump controller from the pressure switch. Just extra work.

I'm running a pretty heavy coach, so my travel psi is about 90psi (Quagrabags). My thoughts would be the Viair 420c. 150psi and about 2.3 CFM. More cfm for guicker fills in that 90 psi range.
With a tank I would think the Viair 480c at 200psi and 1.8 cfm would be the mother of all small pumps.

Any recommendations or Corrections?
Scott


Scott Nutter 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Houston, Texas
Re: Microlevel for the EL11 systems (1978) [message #329447 is a reply to message #329368] Fri, 23 February 2018 16:20
RF_Burns is currently offline  RF_Burns   Mexico
Messages: 1469
Registered: June 2008
Location: S. Ontario, Canada
Karma:
Senior Member
The tank on my 77 PB with EL1 would be smaller than a litre (~US Quart). About 3" in diameter x 6" high (in my mind's eye).


Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
Hubler 1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
Re: [GMCnet] Microlevel for the EL11 systems (1978) [message #329448 is a reply to message #329446] Fri, 23 February 2018 16:53
Richard Denney is currently offline  Richard Denney   United States
Messages: 649
Registered: April 2010
Karma:
Senior Member
But if you have a tank already (because it is an early coach), that
pressure switch and tank pop-off valve are what you need to avoid blowing
up a bag if one of the valves sticks, or if the coach can't level. It will
level to the pressure of a full tank and the pump will simply stop. It's
like leaving a PLI coach in Raise--once it reaches full height (meaning the
bogies are at minimum shock or up against the bogie frame) the bag keeps
filling up until its pressure is the same as the tank. If the tank's
pressure is controlled to safe levels, there is no worry.

But it would be better to have a limiter at the full travel point to close
the valve.

Rick "thinking the main advantage to this for those who have working PLI
systems is the automatic leveling" Denney

On Fri, Feb 23, 2018 at 3:53 PM, Scott Nutter wrote:

> After penciling this thing out and crunching some numbers, I think Keith
> is absolutely right.
> Only one pump and no storage tank..........although the other systems
> would work just as good.
>
> With one pump it's basically plug in and go.
> With the tank system you would need a pressure switch, pressure relief
> valve, and drain valve. Then the wiring to the pump controller from the
> pressure switch. Just extra work.
>
> I'm running a pretty heavy coach, so my travel psi is about 90psi
> (Quagrabags). My thoughts would be the Viair 420c. 150psi and about 2.3
> CFM. More
> cfm for guicker fills in that 90 psi range.
> With a tank I would think the Viair 480c at 200psi and 1.8 cfm would be
> the mother of all small pumps.
>
> Any recommendations or Corrections?
> Scott
> --
> Scott Nutter
> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final
> drive, Quad bags, tankless water heater, everything Lenzi.
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>



--
'73 X-Glacier 230 "Jaws"
Northern Virginia
Offlist email: rick at rickdenney dot com
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Re: [GMCnet] Microlevel for the EL11 systems (1978) [message #329452 is a reply to message #329446] Fri, 23 February 2018 19:59
USAussie is currently offline  USAussie   United States
Messages: 15590
Registered: July 2007
Location: Sydney, Australia
Karma:
Senior Member
Scott,

I have a Viair 480C in Double Trouble and the Kingsley has one of Darcy Moses's York compressors. Both have OEM air bags and will
stay that way.

See J.R. Wright's email below re Darcy's setup.

-----Original Message-----
From: John Wright [mailto:powerjon-AT-chartermi-DOT-net]
Sent: Wednesday, July 23, 2008 9:03 AM
To: gmclist
Subject: Re: [gmclist] York Air compressors

Both of my coaches use the York compressor. My 77 has the Darcy Moses Air package.

http://www.gmcmhphotos.com/photos/showgallery.php?cat=3849

And yes I can use air tools and inflate tires.

http://www.jedi.com/obiwan/jeep/yorkair.html

http://www.coloradok5.com/york.shtml

J.R. Wright
GMC GreatLaker
77 Eleganza Custom
1975 Avion Under Reconstruction
Michigan


Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces-AT-list-DOT-gmcnet-DOT-org] On Behalf Of Scott Nutter
Sent: Saturday, February 24, 2018 7:54 AM
To: gmclist-AT-list-DOT-gmcnet-DOT-org
Subject: Re: [GMCnet] Microlevel for the EL11 systems (1978)

After penciling this thing out and crunching some numbers, I think Keith is absolutely right.
Only one pump and no storage tank..........although the other systems would work just as good.

With one pump it's basically plug in and go.
With the tank system you would need a pressure switch, pressure relief valve, and drain valve. Then the wiring to the pump
controller from the pressure switch. Just extra work.

I'm running a pretty heavy coach, so my travel psi is about 90psi (QuadraBag). My thoughts would be the Viair 420c. 150psi and about
2.3 CFM. More cfm for quicker fills in that 90 psi range.
With a tank I would think the Viair 480c at 200psi and 1.8 cfm would be the mother of all small pumps.

Any recommendations or Corrections?
Scott
--


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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
Forum: GMC Swap Meet
 Topic: Ashtray wanted
Re: Ashtray wanted [message #329440 is a reply to message #322199] Fri, 23 February 2018 13:38
mghamms is currently offline  mghamms   United States
Messages: 91
Registered: March 2016
Location: Ware, Massachusetts
Karma:
Member
Anyone have the ash tray?

1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
Re: Ashtray wanted [message #329441 is a reply to message #329440] Fri, 23 February 2018 13:49
gary-DOT-kojack-AT-gmail-DOT-com is currently offline  gary-DOT-kojack-AT-gmail-DOT-com   United States
Messages: 1
Registered: February 2018
Karma:
Junior Member
TRY APPLIED G M C IN CALIFORNIA
 Topic: original solaire furnace available
original solaire furnace available [message #329453] Fri, 23 February 2018 21:41
rgogan is currently offline  rgogan   United States
Messages: 3
Registered: February 2004
Location: Milwaukee, WI
Karma:
Junior Member
Finally replaced my Solaire furnace with 2540 Atwood. Everything works on the old furnace but the ignition coil is weak and sometimes when it starts up it backfires. No known heat exchanger leaks but that is for the recipient to determine. Hate to throw it away. Anyone interested?
Bob Gogan Milwaukee, WI
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