Dash A/C help

[hal stclair]

Just a few thoughts on the dash air system on the late (1977-78) coaches. Our system seemed to work, after a fact, but nothing to write home about for
sure. If it was much over 90 it wasn't very comfortable and we live in a dry area not plagued with the high humidity many are faced with. Before our
last trip we decided to try using a curtain in the track GMC conveniently installed just behind the driver/passenger seats. My expert Blush seamstress
wife whipped up a nice insulated custom curtain for that track. The first day out from Albuquerque with temps near 100 wasn't too pleasant especially
late afternoon with the western sun making our seating location a real 'fish bowl' . But wait, we had that nice new curtain we hadn't closed behind
us. The next day we closed it and headed on west on through Las Vegas and their 'dry heat' 108. I couldn't believe the difference in temperatures up
front. With the A/C only having to cool the front of the coach, it did a pretty fair job. I'm not going to claim it's as cool as our car, but
certainly acceptable. I guess GMC had a pretty good handle on the problem back in the day.
Something others might want to try for a really small investment.
Oh, BTW, we found some of the smallish hooks GMC used for the curtains already installed on a ribbon which makes the job soo much simpler.
Hal
--
1977 Royale 101348,

1977 Royale 101586, Diesel powered,

1975 Eleganza II, 101230,

1974 Eagle Bus 45',w/slideout,

Rio Rancho, NM

 

[mghamms]

How about a picture?
Wife interested in making a few buck.
i know i could use one and cant sew for $hit.
--
1977 Kingsley 455 as stock as it gets except lots of Ragusa parts

 

[jim kanomata1]

We have found that the most practical way to do the drapes is to make it ,
then use the SS hooks and use the nylon guide and slip them in the track.
This way one can dry clean or wash the drap anytime and not worry about the
plastic tabs breaking off onto the curtain.
We are looking for someone bependable to make them for us. We have the
measurments.

> How about a picture?
> Wife interested in making a few buck.
> i know i could use one and cant sew for $hit.
> --
> 1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
>
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[Randy Van Winkle]

I have a heavy dapery fabric there, others have used clear plastic shower
curtains. Be sure they are long enough to reach the floor. Works equally
well for heating as well as cooling with dash air and heat, and living area
furnace and A/C while camping. If you have the wet bath floor plan, open
the bathroom door and close that curtain and you a small cozy area to heat
or cool.

We will be doing just that tomorrow as we head up to Minneapolis on our way
to the Tallahassee FL spring GMCMI convention. (via CA

> We have found that the most practical way to do the drapes is to make it ,
> then use the SS hooks and use the nylon guide and slip them in the track.
> This way one can dry clean or wash the drap anytime and not worry about the
> plastic tabs breaking off onto the curtain.
> We are looking for someone bependable to make them for us. We have the
> measurments.
>

>
> > How about a picture?
> > Wife interested in making a few buck.
> > i know i could use one and cant sew for $hit.
> > --
> > 1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk
> http://www.appliedgmc.com
> 1-800-752-7502
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> GMCnet mailing list
> Unsubscribe or Change List Options:
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>

 

[Bob Dunahugh]

In our 78. I made a cover for the outside air intake. I can put it in for really hot days. That way I'm assured that I'm truly only cooling inside cooler air. The main difference from what I understand for the 77-78. Is the ability to cool inside air. Bob Dunahugh

 

[emerystora]

Bob
I too made a cover for the outside air intake on the top passenger side of the heater box. But, I leave it on all the time. In the winter you have to heat that outside air. So I don’t need outside air circulation. There are enough small air leaks anyway so there is an outside source of air.

Emery Stora
77 Kingsley
Frederick, CO

>
> In our 78. I made a cover for the outside air intake. I can put it in for really hot days. That way I'm assured that I'm truly only cooling inside cooler air. The main difference from what I understand for the 77-78. Is the ability to cool inside air. Bob Dunahugh
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[Will Albers]

Interesting. I'll have to give this a try! Heck, would duct tape work as a
cover to the fresh air vent?

On the flip side, is there any fear of negative pressure within the coach
and exhaust issues? I thought I heard gm purposely pressurized the interior
via that vent to keep exhaust and fumes out. I'm probably incorrect here.

On Sat, Oct 20, 2018, 3:28 PM Emery Stora via Gmclist <

> Bob
> I too made a cover for the outside air intake on the top passenger side of
> the heater box. But, I leave it on all the time. In the winter you have to
> heat that outside air. So I don’t need outside air circulation. There are
> enough small air leaks anyway so there is an outside source of air.
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
>

> >
> > In our 78. I made a cover for the outside air intake. I can put it in
> for really hot days. That way I'm assured that I'm truly only cooling
> inside cooler air. The main difference from what I understand for the
> 77-78. Is the ability to cool inside air. Bob Dunahugh
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
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[john r. lebetski]

Yes it's called ventilation and positive pressure is a design thing. Cinnabar did an article on this in their old news letter. On factory recirculated
setting it never exceeds 90/10 mix. If you block off the intake you would need to keep the recic door open to supply return air to the squirrel cage.
Or there would be no flow. Also you loose the option for fresh air coming in to keep cool when weather in 50s like this time of year. I find running
with the toll window open for more than a min or so too noise fatigueing.
--
John Lebetski
Woodstock, IL
77 Eleganza II

 

[powwerjon]

John,
What number newsletter, I would like to read it.

JR Wright
Michigan
78 Buskirk Stretch, Chassis #5

>
> Yes it's called ventilation and positive pressure is a design thing. Cinnabar did an article on this in their old news letter. On factory recirculated
> setting it never exceeds 90/10 mix. If you block off the intake you would need to keep the recic door open to supply return air to the squirrel cage.
> Or there would be no flow. Also you loose the option for fresh air coming in to keep cool when weather in 50s like this time of year. I find running
> with the toll window open for more than a min or so too noise fatigueing.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
>
>
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> GMCnet mailing list
> Unsubscribe or Change List Options:
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[jim kanomata1]

The one thing that I have found that creats Heat is the heater core where
the Vac controled valve is not very effective.
I founf a manual controled valve that will stop the flow of Hot coolent
through the core and can be controled from the inside of the coach with a
twist knob.
You will see it on our site under Heating-A/c

On Tue, Oct 23, 2018 at 6:56 AM John R. Lebetski
wrote:

> Yes it's called ventilation and positive pressure is a design thing.
> Cinnabar did an article on this in their old news letter. On factory
> recirculated
> setting it never exceeds 90/10 mix. If you block off the intake you would
> need to keep the recic door open to supply return air to the squirrel cage.
> Or there would be no flow. Also you loose the option for fresh air coming
> in to keep cool when weather in 50s like this time of year. I find running
> with the toll window open for more than a min or so too noise fatigueing.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[Totality]

Do you have "wind wings"? They give plenty of flow and I don't find them too noisy.....

Pete

> Yes it's called ventilation and positive pressure is a design thing. Cinnabar did an article on this in their old news letter. On factory
> recirculated setting it never exceeds 90/10 mix. If you block off the intake you would need to keep the recic door open to supply return air to the
> squirrel cage. Or there would be no flow. Also you loose the option for fresh air coming in to keep cool when weather in 50s like this time of year.
> I find running with the toll window open for more than a min or so too noise fatigueing.

--
Cary, NC

1978 Center Kitchen Royale.