GMCforum: GMCnet » HVAC Mod

Home » Public Forums » GMCnet » HVAC Mod (Purpose of Diverter)

Show: Today's Messages :: Polls :: Message Navigator

HVAC Mod [message #238998]

Thu, 06 February 2014 15:55

Jon payne

Messages: 495
Registered: May 2008

Karma: 1

Senior Member

Guys,

A few posts ago about the HVAC box, there was as reference to an article about "separating hot from cold". In the article it talks about adding a diverter to improve airflow. Looking at the placement of the diverter it would seem to block nearly all the airflow to the heater core?

Has anyone done this mod that could shed some light on the install of this diverter? Will it really block the airflow to the heater core? Any pictures would be welcomed!

Jon
http://gmcws.org/Tech/air_conditioning/air_conditing.html
http://www.gmcmhphotos.com/photos/data/5607/Diverter.JPG

http://www.gmcmhphotos.com/photos/data/5607/Diverter.JPG

Jon Payne
76 Palm Beach
Westfield,IN

Report message to a moderator

Re: HVAC Mod [message #239001 is a reply to message #238998]

Thu, 06 February 2014 16:10

Loffen

Messages: 1087
Registered: August 2013
Location: Norway

Karma: 1

Senior Member

I was a little confused about that one as it would be placed just about the same spot where the flap would go and mine -73 has a reinforcment going there.

You can see it in this picture

http://i1126.photobucket.com/albums/l610/Espen_Heitmann/1973%20Sequoia/IMGP0058_zpsde33e145.jpg

1973 23' # 1848 Sky Blue Glacier called Baby Blue and a 1973 26'-3 # 1460 Parrot green Seqouia Known as the Big Green, And sold my 1973 26'-2 # 581 White Canyon lands under the name Dobbelt trøbbel in Norway

Report message to a moderator

Re: [GMCnet] HVAC Mod [message #239032 is a reply to message #239001]

Thu, 06 February 2014 20:08

Ken Henderson

Messages: 8726
Registered: March 2004
Location: Americus, GA

Karma: 9

Senior Member

I too was always confused about that diverter and never installed it. The
big improvements were: First, eliminating all outside air and replacing it
with recirculated air. Second, resealing the heat/cool door.

Of course, the ultimate improvement was replacing the whole HVAC box to get
more direct air movement:

http://www.gmcmhphotos.com/photos/g5280-dash-air-conditioning-redesign.html

But I guess that's not a viable option for an originality enthusiast. :-)

Ken H.

On Thu, Feb 6, 2014 at 5:10 PM, Espen Heitmann <bimet@online.no> wrote:

>
>
> I was a little confused about that one as it would be placed just about
> the same spot where the flap would go and mine -73 has a reinforcment going
> there.
>
> You can see it in this picture
>
> http://s1126.photobucket.com/user/Espen_Heitmann/media/1973%20Sequoia/IMGP0058_zpsde33e145.jpg.html
> --
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

Report message to a moderator

Re: HVAC Mod [message #239162 is a reply to message #238998]

Sat, 08 February 2014 00:09

Adrien G.

Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624

Karma: 1

Senior Member

Jon Payne wrote on Thu, 06 February 2014 15:55

Jon,
The added air diverter sits just below the swing arc of the temp door. What it does is starts directing the air flow towards the outlet opening and reduces the turbulence that is created when hitting a flat panel (temperature door).

Does it help? Without instruments is hard to tell, it can't hurt.

I added the piece to my unit, tape it on and test for temp door swing before nailing it.

Adrien & Jenny Genesoto 75 Glenbrook (26-3) Mods LS3.70 FD / Reaction Sys / 80mm Front&Intermidiate / Hydroboost / 16" Tires / Frame Rebuild / Interior Rebuild Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6

Report message to a moderator

Re: [GMCnet] HVAC Mod [message #239238 is a reply to message #239162]

Sat, 08 February 2014 20:10

Jon payne

Messages: 495
Registered: May 2008

Karma: 1

Senior Member

Thanks Adrien!

*******************************************
Jon Payne
Customer Account Manager - Republic Airways
Embraer - Ft. Lauderdale
Phone: (317) 246-2641
Cell: (317) 379-5791

> On Feb 8, 2014, at 1:09 AM, Adrien Genesoto <fixman54@syix.com> wrote:
>
>
>
> Jon Payne wrote on Thu, 06 February 2014 15:55
>> Guys,
>>
>> A few posts ago about the HVAC box, there was as reference to an article about "separating hot from cold". In the article it talks about adding a diverter to improve airflow. Looking at the placement of the diverter it would seem to block nearly all the airflow to the heater core?
>>
>> Has anyone done this mod that could shed some light on the install of this diverter? Will it really block the airflow to the heater core? Any pictures would be welcomed!
>>
>> Jon
>> http://gmcws.org/Tech/air_conditioning/air_conditing.html
>> http://www.gmcmhphotos.com/photos/data/5607/Diverter.JPG
>
>
>
>
>
> Jon,
> The added air diverter sits just below the swing arc of the temp door. What it does is starts directing the air flow towards the outlet opening and reduces the turbulence that is created when hitting a flat panel (temperature door).
>
> Does it help? Without instruments is hard to tell, it can't hurt.
>
> I added the piece to my unit, tape it on and test for temp door swing before nailing it.
>
>
>
>
> --
> ”When we avoid the mistakes we might have made, we sometimes make the mistakes that we might have avoided.”
>
>
>
> Adrien & Jenny
> 75 Glenbrook
> Yuba City,Ca.
> _______________________________________________
> 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

Jon Payne
76 Palm Beach
Westfield,IN

Report message to a moderator

Re: HVAC Mod [message #239628 is a reply to message #238998]

Tue, 11 February 2014 23:19

Michael Leipold

Messages: 318
Registered: April 2011
Location: Greensboro NC

Karma: 2

Senior Member

I have a 73 without factory air in the dash.
Is this worth doing to mine to get more warm air?

1973 GMC 26' Glacier - Unknown Mileage - Has a new switch pitch transmission with Powerdrive Smile

Report message to a moderator

Re: HVAC Mod [message #240641 is a reply to message #239628]

Thu, 20 February 2014 19:32

Loffen

Messages: 1087
Registered: August 2013
Location: Norway

Karma: 1

Senior Member

I did find one mod, just under the air outlet towards the firewall you have a 2 x 2" space that there is no use for, when I mounted the new insulation I did cover that space and attached the insulation at the outlet.

I took a picture of, will upload tommorow..

Report message to a moderator

Re: HVAC Mod [message #240683 is a reply to message #240641]

Fri, 21 February 2014 07:26

Loffen

Messages: 1087
Registered: August 2013
Location: Norway

Karma: 1

Senior Member

Pictures

http://i1126.photobucket.com/albums/l610/Espen_Heitmann/1973%20Sequoia/IMGP0066_zpse1ec3bb8.jpg

http://i1126.photobucket.com/albums/l610/Espen_Heitmann/1973%20Sequoia/IMGP0067_zps2f38c3cc.jpg

http://i1126.photobucket.com/albums/l610/Espen_Heitmann/1973%20Sequoia/IMGP0068_zps382052ee.jpg

Report message to a moderator

Re: HVAC Mod [message #240796 is a reply to message #238998]

Fri, 21 February 2014 18:42

bwevers

Messages: 597
Registered: October 2010
Location: San Jose

Karma: 5

Senior Member

I thought the diverter plate was to improve the air-con cold air.
The air has to turn 90 degrees at that location to go
around the heater core and out the dash.

I don't think it will improve heating.
Maybe Kelvin has an answer.....

Bill Wevers GMC49ers, GMC Western States 1975 Glenbrook - Manny Powerdrive, OneTon 455 F Block, G heads San Jose

Report message to a moderator

Re: HVAC Mod [message #240835 is a reply to message #239628]

Sat, 22 February 2014 02:12

Adrien G.

Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624

Karma: 1

Senior Member

Michael Leipold wrote on Tue, 11 February 2014 23:19

I have a 73 without factory air in the dash.
Is this worth doing to mine to get more warm air?

Sorry, it wont help the heat side. I don't know 73 that well, but I would look into changing to a later dash heat/ac unit, or add ac.

It must be a sweat box without AC?

Report message to a moderator

Re: HVAC Mod [message #241106 is a reply to message #238998]

Mon, 24 February 2014 07:55

Michael Leipold

Messages: 318
Registered: April 2011
Location: Greensboro NC

Karma: 2

Senior Member

I drove it from NC to NorCal in the summer of 2011.
I lost 10 pounds, drank water constantly and never had to stop to use the rest room.
Sweat box may be an understatement.

1973 GMC 26' Glacier - Unknown Mileage - Has a new switch pitch transmission with Powerdrive Smile

Report message to a moderator

Previous Topic:	[GMCnet] Olds 455 Cam Gear Drive Sets
Next Topic:	Need measurements of the following please.

Goto Forum:

-=] Back to Top [=-

Current Time: Thu Oct 10 04:29:37 CDT 2024

Total time taken to generate the page: 0.01673 seconds