| Roof air while driving [message #220278] |
Thu, 29 August 2013 02:19  |
jturbo
Messages: 76
Registered: August 2013
Location: Socal
Karma: 1
|
Member |
|
|
Has anyone bridged the alternator to inverter to run roof air while driving?
1978 Royal 403
1977 Birchaven 455
1977 Kingsley 455
All under Upgrading and restoration
Rosemead California
|
|
|
|
|
|
| Re: [GMCnet] Roof air while driving [message #220296 is a reply to message #220286] |
Thu, 29 August 2013 07:16  |
Robin Hood
Messages: 1078
Registered: April 2011
Karma: 3
|
Senior Member |
|
|
This is not to say that it can't be done: there's a company that makes a
super-alternator for military vehicles that puts out several kilowatts.
Remember, however, that the motor that is driving the alternator is also
driving the coach, and that what makes the most sense for a traction motor
is not necessarily the most efficient for driving an alternator/generator.
The coach's engine has to run at all sorts of RPMs and loads, whilst a
generator can run all day at the particular RPM and load that it was
designed for in order to happily produce energy.
On Thu, Aug 29, 2013 at 6:17 AM, Robin Hood <loxley@gmail.com> wrote:
> An AC takes kilowatts and has a high starting load. It would take a very
> beefy inverter.
>
>
> On Thursday, August 29, 2013, john wrote:
>
>>
>>
>> Has anyone bridged the alternator to inverter to run roof air while
>> driving?
>>
>>
>> --
>> 1978 Royal 403
>> 1977 Birchaven 455
>> 1977 Kingsley 455
>>
>> All under Upgrading and restoration
>>
>> Rosemead California
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
> --
> Robin Hood
> Jackson, MS
> 2013 Subaru Outback "Top Flight"
> 1968 Pontiac Catalina "The Cheshire Cat"
> 1978 GMC Royale motorhome "Pinto Bean"
> 1977 GMC Palm Beach motorhome "Barn Queen"
>
>
--
Robin Hood
Jackson, MS
2013 Subaru Outback "Top Flight"
1968 Pontiac Catalina "The Cheshire Cat"
1978 GMC Royale motorhome "Pinto Bean"
1977 GMC Palm Beach motorhome "Barn Queen"
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] Roof air while driving [message #220298 is a reply to message #220296] |
Thu, 29 August 2013 07:54 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
|
Senior Member |
|
|
I think the gmc came with an engine driven ac generating device.
Todd Sullivan
Sully
77 royale
Seattle
On Aug 29, 2013, at 5:16 AM, Robin Hood <loxley@gmail.com> wrote:
> This is not to say that it can't be done: there's a company that makes a
> super-alternator for military vehicles that puts out several kilowatts.
>
> Remember, however, that the motor that is driving the alternator is also
> driving the coach, and that what makes the most sense for a traction motor
> is not necessarily the most efficient for driving an alternator/generator.
> The coach's engine has to run at all sorts of RPMs and loads, whilst a
> generator can run all day at the particular RPM and load that it was
> designed for in order to happily produce energy.
>
>
> On Thu, Aug 29, 2013 at 6:17 AM, Robin Hood <loxley@gmail.com> wrote:
>
>> An AC takes kilowatts and has a high starting load. It would take a very
>> beefy inverter.
>>
>>
>> On Thursday, August 29, 2013, john wrote:
>>
>>>
>>>
>>> Has anyone bridged the alternator to inverter to run roof air while
>>> driving?
>>>
>>>
>>> --
>>> 1978 Royal 403
>>> 1977 Birchaven 455
>>> 1977 Kingsley 455
>>>
>>> All under Upgrading and restoration
>>>
>>> Rosemead California
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>>
>> --
>> Robin Hood
>> Jackson, MS
>> 2013 Subaru Outback "Top Flight"
>> 1968 Pontiac Catalina "The Cheshire Cat"
>> 1978 GMC Royale motorhome "Pinto Bean"
>> 1977 GMC Palm Beach motorhome "Barn Queen"
>
>
> --
> Robin Hood
> Jackson, MS
> 2013 Subaru Outback "Top Flight"
> 1968 Pontiac Catalina "The Cheshire Cat"
> 1978 GMC Royale motorhome "Pinto Bean"
> 1977 GMC Palm Beach motorhome "Barn Queen"
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
|
|
|
|
|
|
|
|
|
|
| Re: [GMCnet] Roof air while driving [message #220328 is a reply to message #220302] |
Thu, 29 August 2013 11:56 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
We fitted a couple from the outfit in Tejas which sells them to the maker of the Navy's riverine boats. 5KW alternator and 5KW inverter, along with a throttle controller. We saw a bit more sag when they're suddenly loaded than we do on a genset, because the truck (or boat) engine has a longer 'spool up' time than a small genset engine. They worked just fine. We fitted them where there wasn't room in the truck for a genset, by the time we bought the set and the mounts, they were as expensive as an Onan of equal output. Since they are inverter sets, engine speed need only be sufficient to pull the load. In an E300 Econoline with a V10 Triton engine, 1900 RPM developed the full 5KW.
--johnny
'76 23' transmode norris
'76 palm beach.
--------------------------------------------
On Thu, 8/29/13, Jim Bounds <gmccoop@yahoo.com> wrote:
Subject: Re: [GMCnet] Roof air while driving
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Date: Thursday, August 29, 2013, 1:21 PM
you have a rotory compressor,
efficient Pinguin roof AC unit you could do it. There are
kits for this but the RPM of the motor sets up the voltage
so you would need a pretty involved regulator system and
then you get it all rigged up- you stand back and something
happens you didn;t expect and it's back to the drawing
board. If reliability is supposed to be in there somewhere
it would be about as cost effective to fire up the generator
and let the motor just pull you down the road. Leave off
the dash AC and you will use less fuel for sure.
Sometimes just because you can do something may not be a
good reason to do it!
Jim Bounds
-------------------------
________________________________
From: john <tg16jturbo@mac.com>
To: gmclist@temp.gmcnet.org
Sent: Thursday, August 29, 2013 3:19 AM
Subject: [GMCnet] Roof air while driving
Has anyone bridged the alternator to inverter to run roof
air while driving?
--
1978 Royal 403
1977 Birchaven 455
1977 Kingsley 455
All under Upgrading and restoration
Rosemead California
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
| Re: Roof air while driving [message #220341 is a reply to message #220278] |
Thu, 29 August 2013 12:53 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
|
Senior Member |
|
|
What about using a delivery van refer unit that has an engine driven compressor and a roof mounted evap/condenser unit. You see these on flower and meat delivery vans, and the ones they put on the sprinter vans are low profile and kind of cool looking. I was trying to find out who makes those before I stopped using my coach. Stuff one in the vent hole at the front of the coach...
Of course, a rear Van AC unit tee'd into the dash air system works well too. Put the second evap unit under the couch...
converting mechanical energy to 12V to 120V to mechanical cooling is too Rube Goldberggy to me. One of these days I will design and build an RV energy unit that runs the compressor directly... I just need to build that fusion reactor now...
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
|
|
|
|
| Re: Roof air while driving [message #220380 is a reply to message #220278] |
Thu, 29 August 2013 17:49 |
winter
Messages: 247
Registered: September 2007
Location: MPLS MN
Karma: 0
|
Senior Member |
|
|
I picked up a coupe Auragen units a few years ago with the installation kits for a Ford superduty. I was going to try and mount one to the engine on the GMC but haven't had time to try it yet.
I don't think my models have the 12 volt output where some of the newer ones do. Probably why I found them for cheap on craigs list.
The power unit is about 12" in diameter and 4" thick. The inverter unit is the size of a couple cases of beer. I think they are 5k continous and 8k surge.
Until i get around to installing that set up, I run a Honda 3k on a rack on back. The roof AC is the only way my rig keeps me and the family cool.
Jerrod Winter
1977 Palm Beach
Green Jelly Bean
Twin Cities, Minnesota
|
|
|
|
|
|
|
|
|
|
| Re: [GMCnet] Roof air while driving [message #220409 is a reply to message #220408] |
Thu, 29 August 2013 20:23 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
|
Senior Member |
|
|
put a second evaporator under my couch, works great. I had an AC shop make some custom hoses so it all runs off the engine compressor.
The dash air still sucks tho,
Sometimes I think I should just pull the dash evap and move it inside the coach like Emory did
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
|
|
|
|
|
|
|
|
| Re: [GMCnet] Roof air while driving [message #220416 is a reply to message #220414] |
Thu, 29 August 2013 21:03 |
Jeff Marten
Messages: 199
Registered: August 2013
Karma: 1
|
Senior Member |
|
|
http://community-2.webtv.net/tbrown78/TimBrownsGMC/
He shows his rear evaporator,under the rear U-dinette, runs off the dash system.
> From: ljdavick@comcast.net
> Date: Thu, 29 Aug 2013 18:59:09 -0700
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Roof air while driving
>
> Somebody grabbed a rear AC unit from a Chevy van with the intention of installing it in the rear cap. I wonder how that went.
>
> Larry Davick
>
> On Aug 29, 2013, at 6:23 PM, Keith V <my427v8@hotmail.com> wrote:
>
> >
> >
> > put a second evaporator under my couch, works great. I had an AC shop make some custom hoses so it all runs off the engine compressor.
> >
> > The dash air still sucks tho,
> > Sometimes I think I should just pull the dash evap and move it inside the coach like Emory did
> > --
> > Keith
> > 69 Vette
> > 29 Dodge
> > 75 Royale GMC
> > Mounds View. MN
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
1985 Gulf Stream 34' Sun Stream
1964 Falcon 'Vert
1980 Bradley GTE
1999 Chevy Tahoe
2005 Saab 93 Aero
1987 Suzuki Intruder 1400
1978 Glastron/Carlson CV23
|
|
|
|
| Re: [GMCnet] Roof air while driving [message #220420 is a reply to message #220408] |
Thu, 29 August 2013 21:26 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Emery,
This is a great solution for GMC's that have the controls for EL I and EL II on the driver side panel. For those of us with EL I and
PL controls on the lower right of the steering column installing a second evaporator is more difficult because those controls are in
the way.
I have a second evaporator installed in Double Trouble angled in under the dash which allows me access to the PL controls. I don't
know who makes the unit but the squirrel cage blowers have a rather small OD and at max flow they scream (LITERALLY!)
I was at a swap meet in Conroe, TX and stumbled on an early Mustang under dash unit. It has blowers that are about 5 inches OD and
are quieter. I will be installing it when I get back to Houston after Branson. I wanted to do it before our tour but ran out of
time.
I particularly like the way Emery tapped into the OEM system with the "T" fittings; it means you only disturb two connections and
that's a good thing.
Regards,
Rob M.
-----Original Message-----
From: Emery Stora
Robin
Here is how I did it years ago.
http://www.gmcmhphotos.com/photos/g3356-aux-air-conditioner-evaporator.html
Emery Stora
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
