 Part Question, Impeller Flapper ?? |
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| jim_hoyland |
 Sep 1 2008, 07:52 PM
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#1
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Get that VIN ?  Group: Members Posts: 9,283 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California 
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How important is this part ? I noticed it's missing from my new fan housing and the current one lacks it too.
There's a nice pic of it on page 178 AA Catalog... |
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| r_towle |
Sep 1 2008, 08:19 PM
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#2
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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keeps the mice out.
Rich |
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| Bartlett 914 |
Sep 1 2008, 09:28 PM
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#3
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Advanced Member Group: Members Posts: 2,215 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
When the engine is idling, there is less air available for the cabin. The electric fan is used to boost the airfllow. The flappers act as check valves so the electric fan can provide more air.
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| jim_hoyland |
Sep 1 2008, 10:02 PM
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#4
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Get that VIN ? Group: Members Posts: 9,283 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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QUOTE(Bartlett 914 @ Sep 1 2008, 08:28 PM)  When the engine is idling, there is less air available for the cabin. The electric fan is used to boost the airfllow. The flappers act as check valves so the electric fan can provide more air. So they are closed at idle, or does the flow from the fan close them ? |
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| davesprinkle |
Sep 1 2008, 10:55 PM
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#5
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Senior Member Group: Members Posts: 720 Joined: 13-October 04 From: Berkeley, CA Member No.: 2,943 Region Association: None
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QUOTE(jim_hoyland @ Sep 1 2008, 09:02 PM) QUOTE(Bartlett 914 @ Sep 1 2008, 08:28 PM) When the engine is idling, there is less air available for the cabin. The electric fan is used to boost the airfllow. The flappers act as check valves so the electric fan can provide more air. So they are closed at idle, or does the flow from the fan close them ? Jim, The flappers close off the fan housing when engine speed is low. This prevents air from the electric fan from escaping into the fan housing. As engine speed climbs, the higher pressure in the fan housing forces the flaps open. |
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| rhodyguy |
Sep 2 2008, 08:15 AM
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#6
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,076 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
jim, which side do you need? l or r? is the pin it hangs on absent too?
k |
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| jim_hoyland |
Sep 2 2008, 08:51 AM
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#7
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Get that VIN ? Group: Members Posts: 9,283 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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Thanks for the info; now I know why the electric fan does't seem to push warm air into the cabin at idle. I assume. these can be put on when the SS HE are fitted. (IMG:style_emoticons/default/smile.gif)
PM sent- KP Here's a pic of the set up... Attached image(s) 
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