 Splitting Impeller housing, Update: tins and flaps with headers? |
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| rfinegan |
 Jul 26 2021, 02:51 PM
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#1
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Senior Member  Group: Members Posts: 1,042 Joined: 8-February 13 From: NC Member No.: 15,499 Region Association: MidAtlantic Region 
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I have my impeller house apart for cleaning and it appears there were alignment pins for the front and back halves . How many are there? I have 2 pins around the impeller itself. There seems to be holes in the perimeter for pins too? Please review and advise so I can dig up some more as needed
Best Robert Diagram does not show the housing in 2 pieces  |
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| Nogoodwithusernames |
Jul 28 2021, 01:55 PM
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#2
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Member Group: Members Posts: 277 Joined: 31-May 16 From: Sutter, CA Member No.: 20,051 Region Association: None |
I've been told that Jake Raby does not block off the little heater outlets. His testing showed that it caused turbulent air in the fan housing decreasing cooling ability.
I've not seen the original thread where he says that so take it second or third hand but I am running with no block off. |
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| worn |
Jul 28 2021, 05:44 PM
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#3
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can't remember Group: Members Posts: 3,378 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest
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QUOTE(Nogoodwithusernames @ Jul 28 2021, 11:55 AM)  I've been told that Jake Raby does not block off the little heater outlets. His testing showed that it caused turbulent air in the fan housing decreasing cooling ability. I've not seen the original thread where he says that so take it second or third hand but I am running with no block off. I would like to see the data supporting that. The discussion reminds me of people with water cooled engines putting flow restrictors in so that the water has “more time to cool off in the radiator. Thermodynamics says it ain’t so, and in my life the laws of physics aren’t just opinions. Opening the flaps will certainly reduce the air pressure driving cooling air past the nice cooling fins. I could certainly believe in some weird standing wave or other turbulent idea though. When I installed the 3.2 with headers I certainly made a block off plate rather than simply leaving the plastic heater feeder sitting there open. But that isn’t a four. |
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| Dave_Darling |
Jul 29 2021, 02:10 PM
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#4
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914 Idiot Group: Members Posts: 15,067 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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QUOTE(worn @ Jul 28 2021, 04:44 PM) ... in my life the laws of physics aren’t just opinions. As I said earlier, fluid dynamics is the least-intuitive and most empirical of all of the engineering disciplines. There's a lot of "well, we have fiddled the equations to fit the observations" because a lot of it just doesn't make intuitive sense from underlying principles. --DD |
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Posts in this topic
rfinegan Splitting Impeller housing Jul 26 2021, 02:51 PM
rfinegan I pulled another housing apart and it looks to hav... Jul 26 2021, 03:48 PM bkrantz My fuzzy memory agrees with 2 pins. Jul 26 2021, 07:54 PM rfinegan AWESOME..>That matches what I have too
Thanks ... Jul 27 2021, 04:17 AM rfinegan What are people in the "914 Word" doing ... Jul 27 2021, 04:20 AM
Shivers
What are people in the "914 Word" doing... Jul 27 2021, 08:06 AM Dave_Darling I have heard arguments that the cooling setup was ... Jul 27 2021, 05:27 PM worn
I have my impeller house apart for cleaning and i... Jul 27 2021, 08:28 PM Mark Henry
I've been told that Jake Raby does not block... Jul 29 2021, 09:04 AM 930cabman I was considering blocking off the small rectangul... Jul 28 2021, 02:59 PM mate914 Looking at the snail shaped fan or fractal. The ai... Jul 29 2021, 08:05 AM davep The heating system does offer a fair amount of res... Jul 29 2021, 10:28 AM |
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