cabin air flow question
Thread Starter
Pro
Joined: May 2005
Posts: 745
Likes: 0
From: Miami Florida
cabin air flow question
i see no reason why i would EVER need to mix outside air with my cabin air. to me it just sabotages the temp. with this in mind. how do i keep the outside air doors from opening?
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
If you never want it open? Disconnect the vacuum line and cap it off. Then fix the door to a closed position however you see fit.
I would avoid permenant closure in case you ever change your mind.
I would avoid permenant closure in case you ever change your mind.
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
If you set your a/c to max setting this closes off the outside air and recirculates the cabin air.
Not a well known fact is that when in the max position in a cold cabin it puts higher pressures on the a/c system and compressor especially, thus a shorter lifespan.
Realizing this, auto manufacturers, sick of high waranty claims, and now with electronic controls for a/c, have made the system default to fresh air for a/c whenever the vehicle is restarted.
The recommended usage is to use max a/c to quickly get the cabin to a comfortable temp and from that, then the regular setting (a/c with fresh air) should be used.
Not a well known fact is that when in the max position in a cold cabin it puts higher pressures on the a/c system and compressor especially, thus a shorter lifespan.
Realizing this, auto manufacturers, sick of high waranty claims, and now with electronic controls for a/c, have made the system default to fresh air for a/c whenever the vehicle is restarted.
The recommended usage is to use max a/c to quickly get the cabin to a comfortable temp and from that, then the regular setting (a/c with fresh air) should be used.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
If I want fresh air I take the tops off and kick out the back window. I've noticed I have to drive in the winter with the windows cracked anyway since the defrost does such a crappy job. I breath hot and heavy and my window gets fogged fast...
Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
Originally Posted by Durango_boy
If I want fresh air I take the tops off and kick out the back window. I've noticed I have to drive in the winter with the windows cracked anyway since the defrost does such a crappy job. I breath hot and heavy and my window gets fogged fast...
ESU
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by ESU
The defroster needs outside air to help clear the windows. If you've sealed up or otherwise negated the ability of the system to induct outside air you will experience fogged windows. And it wont be from staring at your old avatar! I sealed the flapper door inside the pass side fender well behind the screen with good old american duct tape. Took 10 minutes to do and will take 10 mins to undo if I so desire. I wanted the best possible cooling for the summer, not so worried about winter.
ESU
ESU
Heh, good call about the avatar. But the fogging happened with the door working properly, so outside air was allowed into the system. Maybe my vents suck...or blow, or whatever they do.
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Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
Originally Posted by Durango_boy
Heh, good call about the avatar. But the fogging happened with the door working properly, so outside air was allowed into the system. Maybe my vents suck...or blow, or whatever they do.
ESU
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Originally Posted by ESU
That explains the fogging.
So how did non-A/C cars battle the fog? I'd like to get the problem solved before my next winter of driving, which could be in a few weeks...
Racer
Joined: Aug 2000
Posts: 364
Likes: 3
From: Van Wert Ohio
Along these same thoughts...........I disconnect my heater hoses in the summer to help the AC. My Sanden conversion is almost too cold sometimes but the temperature control lever semmes to make no diffrence. Does the heater have too be working and the vacuum water valve working to adjust the temp??
Pro
Joined: May 2002
Posts: 518
Likes: 17
Yes, and the Blend Door Cable needs to be adjusted correctly...
Doug
Doug
Originally Posted by vett79
Along these same thoughts...........I disconnect my heater hoses in the summer to help the AC. My Sanden conversion is almost too cold sometimes but the temperature control lever semmes to make no diffrence. Does the heater have too be working and the vacuum water valve working to adjust the temp??
Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
Originally Posted by Durango_boy
So how did non-A/C cars battle the fog? I'd like to get the problem solved before my next winter of driving, which could be in a few weeks...
ESU
Melting Slicks
Joined: Nov 2003
Posts: 2,362
Likes: 1
From: San Antonio TX
For fogged windows get Rain X FOG and put it on the inside of the windows works well. Not to mention Rain X on the windsheild for rain and they also now have window washer fluid with Rain X in it. Does a great job. 
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
Originally Posted by Durango_boy
So how did non-A/C cars battle the fog? I'd like to get the problem solved before my next winter of driving, which could be in a few weeks...
As mentioned prior by ESU and doug_dayson, the blend door adjusts the temperature inside the cabin with both the a/c and heater working.
For winter driving, you can put a switch to manually turn off the a/c compressor for gas mileage, so it does not run in the cold weather. It is adviseable to run the a/c once in a while all year long to keep the compressor shaft seals in better shape.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Well...I took my AC out. Probably won't bother hooking it back up unless I do it with the new motor's serp system. I'll have to re-install a few parts. I don't think I will ever put it back in. I liek the tops off and windows down approach to summer driving. If I want AC I'll drive my Durango.
Now, as far as the heater, I plan on using that and a combo of a cracked window to regulate the air temp in the cabin. Would have worked well last few winters but the blower motor and duct system sucked.
Now, as far as the heater, I plan on using that and a combo of a cracked window to regulate the air temp in the cabin. Would have worked well last few winters but the blower motor and duct system sucked.