I just redid mine and you can see a picture of the vents in my other thread about Redid my rear vents. I will post a picture of the whole setup once I get it back in the car.
Astro Ventilation?
Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
Originally Posted by Silver72
Can someone explain to me what "Astro Ventilation" is and how it works?
Astro Ventilation incorporated vents at the front end of the cabin with vents at the rear deck just behind the rear window. Air flows from the cowl, collecting in the plenum, flowing through both dash vents (ventilation *****) and the kick panel vents, flowing through the cabin, moving through the cabin out through the rear deck vents.
Hope this helps!
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Just one more thing to add. The astrovents will stay open anytime the temperature controls are in the minimum position. Dial up any heat and the astrovent doors will go closed, obviously to save heat in the car.
Drifting
Joined: May 2003
Posts: 1,634
Likes: 2
From: Melbourne, Victoria, Australia, the World
Another 68 only thing-
There were only flaps in the rear to stop water and reverse air pressure from entering the cabin.
In 69 the vacuum motor was added to stop the loss of hot air, Like we need to stop hot air escaping
There were only flaps in the rear to stop water and reverse air pressure from entering the cabin.
In 69 the vacuum motor was added to stop the loss of hot air, Like we need to stop hot air escaping
Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
Originally Posted by RHD '68 L89
Another 68 only thing-
There were only flaps in the rear to stop water and reverse air pressure from entering the cabin.
In 69 the vacuum motor was added to stop the loss of hot air, Like we need to stop hot air escaping
There were only flaps in the rear to stop water and reverse air pressure from entering the cabin.
In 69 the vacuum motor was added to stop the loss of hot air, Like we need to stop hot air escaping
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Drifting
Joined: Oct 2003
Posts: 1,426
Likes: 1
From: VetteMOD
St. Jude Donor '05-'07
Originally Posted by RHD '68 L89
Another 68 only thing-
There were only flaps in the rear to stop water and reverse air pressure from entering the cabin.
In 69 the vacuum motor was added to stop the loss of hot air, Like we need to stop hot air escaping
There were only flaps in the rear to stop water and reverse air pressure from entering the cabin.
In 69 the vacuum motor was added to stop the loss of hot air, Like we need to stop hot air escaping
Safety Car
Joined: Jun 2002
Posts: 4,135
Likes: 1
Originally Posted by StickShiftCorvette
Anytime the temp control is above full cold, the exhaust door closes. BTW, only non-AC cars have Astro Ventilation.
Drifting
Joined: May 2003
Posts: 1,634
Likes: 2
From: Melbourne, Victoria, Australia, the World
Originally Posted by BBShark
I have a 68 (completely apart) and I have been debating about restoring the old passive "flap" system, converting to later active, vacuum operator door or closing off. Any 68 owners have a recommendation?
Instructor
Joined: Aug 2011
Posts: 109
Likes: 6
From: Hessen
I was always wondering what this "Astro Ventilation" was supposed to be. However... my 1972 Coupe (with air condition) has the script on the side glass... but the rear deck vents do not have any flaps nor vacuum operated mechanism... they just have the usual drain hoses leading into the wheel well.
Does anyone have pictures of that area from inside the vehicle showing all the mechanics!?!
Thanks!!!
Cheers...
René
Does anyone have pictures of that area from inside the vehicle showing all the mechanics!?!
Thanks!!!
Cheers...
René
Team Owner
Joined: Sep 2006
Posts: 31,202
Likes: 4,287
From: Westminster Maryland
Hi Rene,
The Astro Ventilation system was developed when side 'vent' windows were done away with for the 68 model year. The idea was to have fresh air enter at the cowl and flow through the interior to exit through these vents. The vents closed automatically when the temperature control was turned to 'H'eat.
Here's part of the 'astro' system on a 71 coupe. It's the left side right behind the driver's side seat.
Regards,
Alan
You can see the vacuum actuator that opens and closes the door on the right and part of one of the metal doors on the left.
The drain hose for the plenum that the door open and closed into.
The Astro Ventilation system was developed when side 'vent' windows were done away with for the 68 model year. The idea was to have fresh air enter at the cowl and flow through the interior to exit through these vents. The vents closed automatically when the temperature control was turned to 'H'eat.
Here's part of the 'astro' system on a 71 coupe. It's the left side right behind the driver's side seat.
Regards,
Alan
You can see the vacuum actuator that opens and closes the door on the right and part of one of the metal doors on the left.
The drain hose for the plenum that the door open and closed into.
Instructor
Joined: Aug 2011
Posts: 109
Likes: 6
From: Hessen
Hi Alan,
thanks so much for your explanation and the pictures! That helps a lot!
However, I have checked my car... and there is nothing (no vacuum actuator... no vacuum hoses... no flaps ... Is it possible, that 1972 Cars with air condition do not have this feature at all / anymore... probably deleted like the removable rear window for 1973?
Cheers...
René
thanks so much for your explanation and the pictures! That helps a lot!
However, I have checked my car... and there is nothing (no vacuum actuator... no vacuum hoses... no flaps ... Is it possible, that 1972 Cars with air condition do not have this feature at all / anymore... probably deleted like the removable rear window for 1973?
Cheers...
René
Safety Car
Joined: Feb 2012
Posts: 4,705
Likes: 983
From: Orlando FL
Team Owner
Joined: Sep 2006
Posts: 31,202
Likes: 4,287
From: Westminster Maryland
Hi Rene,
Here's a picture from a prior post showing an a/c convertible with the block- off plate in place.
The convertible system was in a slightly different position because of the differences between coupe and convertible body configurations.
Regards,
Alan
Here's a picture from a prior post showing an a/c convertible with the block- off plate in place.
The convertible system was in a slightly different position because of the differences between coupe and convertible body configurations.
Regards,
Alan
Instructor
Joined: Aug 2011
Posts: 109
Likes: 6
From: Hessen
Hey guys...
thanks a lot for your responses, explanation and pictures.
Now it is clear to me... AC has no vent flaps but a block-off plate... that is how my car looks like! So everything is as supposed.
Cheers...
René
thanks a lot for your responses, explanation and pictures.
Now it is clear to me... AC has no vent flaps but a block-off plate... that is how my car looks like! So everything is as supposed.
Cheers...
René
Race Director
Joined: Jul 2004
Posts: 12,694
Likes: 329
From: Scottsdale Arizona