 Rebuilt Engine Assembly and Test, About to fire up the engine |
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| LotusJoe |
 Apr 11 2012, 08:03 PM
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#1
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Europa Twink Driver  Group: Members Posts: 406 Joined: 30-November 09 From: Southern California Member No.: 11,085 Region Association: Southern California  |
I'm in the process of testing my engine on a test stand before installing back into the car. There are 2 outlets on the bottom of the blower that originally had flappers. In my case they are long gone. How critical, if at all are these flappers?
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| dlee6204 |
Apr 11 2012, 08:12 PM
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#2
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Howdy Group: Members Posts: 2,162 Joined: 30-April 06 From: Burnsville, NC Member No.: 5,956 |
They help with the heating system. If you want heat, add them.
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| Black22 |
Apr 11 2012, 08:31 PM
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#3
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Senior Member Group: Members Posts: 886 Joined: 1-November 07 From: Creswell, OR Member No.: 8,290 Region Association: Pacific Northwest |
Slight Hi-jack...
If you only have heat on the Drivers side should you cap the Passenger side or leave it? |
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| timothy_nd28 |
Apr 11 2012, 08:42 PM
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#4
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest 
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I thought I read somewhere that the flaps close at idle speed, which helped circulate air directly to the engine. At the lower idle RPM range, the engine needs all available air to help cool the engine, as the car rev'd up in RPM, the flaps would open, directing air to the heat exhangers? (IMG:style_emoticons/default/confused24.gif)
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| McMark |
Apr 11 2012, 11:30 PM
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#5
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
The flaps only close when the aux fan goes on to keep more air in the heat exchanger system. If you leave them off, your aux fan may not blow as hard into the cabin, but otherwise they're irrelevant.
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