Fresh Air Blower, Sound, but no fury |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Fresh Air Blower, Sound, but no fury |
rwilner |
Oct 4 2010, 08:35 AM
Post
#1
|
No Ghosts in the Machine Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
When I put both black levers to the right, I can hear the fresh air fan blowing but the airflow out the defrost and dash vents is quite minimal. The fan does work on all 3 speeds.
Similarly -- I just reattached all my heat, and even with the booster fan going in the engine compartment, there is just not much airflow. The engine compartment hose and the flapper --> firewall hose are new, the HX's are SSIs in good shape as is the rest of the engine compartment plumbing. What level of airflow should I expect? What should i check or refurbish to get better CFMs? |
McMark |
Oct 4 2010, 06:48 PM
Post
#2
|
914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Red lever has nothing to do with the fresh air blower.
I looked at the air flow system again to refresh myself. Here's the important points: 1. The dash vents are a 'branch' off the defrost vents. So anytime you're on 'defrost' you're also blowing out the side vents. This is something I had never considered. You'll get better windshield defrosting if you shut the side vents closed with the little lever. 2. The fresh air location lever (middle) and the hot air location lever (bottom, red) both work the same way. All the way to the left directs the air out the bottom. All the way to the right directs air out the defrost vent (see #1). 3. Pressing the floor lever down is supposed to shut off hot air completely. Moving the top dash lever all the way left is supposed to shut off fresh air completely. 4. If you're getting unequal flow between the left and right vents, you need to check the hoses and boxes for obstructions. You also need to confirm that your flapper boxes are opening fully at the exhaust system. And that your fresh air box valves are opening correctly (pull the paper tubes and look inside). |
Lo-Fi Version | Time is now: 7th June 2024 - 04:56 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |