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Discussion Starter · #1 · (Edited)
I'm wanting to add some cooling to my motor (ES-31B @ 120v) before Houston summer arrives.

As I understand it, either a bilge or centrifugal (squirrel cage) blower is required (similar to those pictured below).

Is there a significant difference noise-wise? bilge's seem much cheaper ($20-30 vs $60+) but I'd like to keep noise down also.



 

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You'll get more flow and higher pressure from a centrifugal blower. They are also quieter. If you want some serious flow, you might stop at a junk yard and find a blower used for AC/Heater. They are generally quite large, and capable of some serious air flow.
 

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Thanks for the input, I assumed centrifugals were better but just wondering if it's enough to justify 3x cost.

Any numerical guess at the noise difference, say in dB?

I don't think I need a whole lot of flow, I've been running since Oct and it always runs hot to the touch, but only a couple times was I concerned at all (while running in 4th, usually I'm in 2nd).
 

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The noise is going to depend on size/speed/CFM...

You can look up cutsheets on Digikey.
http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=1179730&k=fan




Thanks for the input, I assumed centrifugals were better but just wondering if it's enough to justify 3x cost.

Any numerical guess at the noise difference, say in dB?

I don't think I need a whole lot of flow, I've been running since Oct and it always runs hot to the touch, but only a couple times was I concerned at all (while running in 4th, usually I'm in 2nd).
 
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