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*20 - 50% CFM increase and add more static pressure to your fans - Magnet Super Charging - Page 2

post #11 of 71
Thread Starter 
If you were wondering, Im making tweaks and waiting for the epoxy to dry tongue.gif

Found out if you don't glue down the magnet it doesn't stay in if you tilt the fan & will make some noise.
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post #12 of 71
It's worth noting that not all fans have magnets that are easy to remove tongue.gif
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post #13 of 71
Thread Starter 
Quote:
Originally Posted by superericla View Post

It's worth noting that not all fans have magnets that are easy to remove tongue.gif

RPM's

Initial RPM 1800 ~ 1850 - with original Scythe Fan blades

After RPM 1950 - 2100 with Coolmax fan blades.... (( the only ones I had peeps D: , wish I could super charged a noctua or something ))

http://www.newegg.com/Product/Product.aspx?Item=N82E16835130018 - coolmax

http://www.newegg.com/Product/Product.aspx?Item=N82E16835185060 - Scythe victim

note: reason I didn't use scythe's fan blades because .... well... they broke tongue.gif

I started this experiment just changing the fanblade, but, i noticed the magnet inside the fan, and tested this out.

But to note: The fan right now is gunked with leaking epoxy and lacking oil tongue.gif because I had to tweak it, and wanted some RPM's to shoot out.


I would definately say that these shoot out more static pressure/CFM than the original 110 CFM from the scythe.

Almost comparable to my Delta, but not quite.

I will definately update my results with better fan blades / build quality next time. tongue.gif I really screwed up a lot of things hahaha. tongue.gif

such as running the fan with wet epoxy... wet paint... wet clear coat...

Well I suppose they call it an experiment for a reason!

smile.gif well then, until I get new fans, please await round 2!

edit:

Im gonna take a wild guess at this on why the CFM/pressure increases while DB stays low:

1. There is an electromagnetic motor inside the fan (( duh ))
2. When the fan is turned on, the polarity causes the magnet attatched to the fan to spin. (( the stronger the opposing magnet, the harder the rotation (( possibly higher RPM's ))
3. So when doubling the Magnet's magnetic output, essentially you get, more work. or in this case CFM/ Pressure
4. However Though the fan spins at a harder rate, the initial centripetal expanding forces are increased as well, increasing the vibration a bit too, So if you suffer fan vibration noises already, this probably won't help you cure that problem.

I believe that instead of ~ 110 CFM, im getting about 130CFM, I probably could have gotten more If I did not add more Mass to the fan blades (( originally I tested this with the original clear fan blades, but tested the RPM's when it was painted ))

and if I glued the magnet down early, since... the magnet causes friction if you don't.


Also: This runs much faster on a fan controller than on the board.
Edited by kyismaster - 4/11/12 at 7:25pm
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post #14 of 71
Thread Starter 
Another update: It has been 8 hours, epoxy has dried.

Any noise? Maybe this slight vibration hum, Probably ~ increases it by 1-2 DB (( If you have rubber fan mounts, you won't hear this at all ))

Has it blew up and flown apart? nah, its pretty solid.

Anyways, It dropped my PC a whole 2-3 celcius than previously when I had the unmodded fan in, if that sheds any light non the proof of increased performance.

Ambient is : 28c
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post #15 of 71
Why not just get a fan that spins faster?
 
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post #16 of 71
Quote:
Originally Posted by ramicio View Post

Why not just get a fan that spins faster?

Why not get a fan that spins faster, then apply this mod to get even more cfm? tongue.gif
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post #17 of 71
cause this is more fun... i may try this on some yateloons got em cheap anyways
post #18 of 71
Stronger magnets will not increase the fan speed. This mod is snake oil. The coils are fired at a fixed speed. The only way to increase the speed is to change resistor and capacitor values in the driving circuit, or buy a different fan. Your readings are skewed because you have more magnets inside the fan triggering hall-effect sensor. The only thing this will do faster is spin up the fan from a standstill to full speed. And on top of this, you're not giving any measurements. You're just claiming some huge arbitrary CFM and inHg gain.
 
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post #19 of 71
Let me know how it goes, this would be a great way to improve some cheap Yate Loons, and I have quite a few lying around.

Also I could see this improving pressure because the increased magnetic resistance would increase the current necessary to spin the fan.(more force could = more pressure) Although I do agree the speed difference does not make sense. The fan controller running it faster than the motherboard would go nicely with an assumption of increased current draw due to the higher magnetic resistance.(the motherboard fan headers have a maximum current they can supply, and a fan controller frequently can supply more)
Edited by Subcutaneous - 4/12/12 at 9:05am
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post #20 of 71
Tried it on some antec fans I had laying around but the magnets were superglued to a bit of metal on the inside of the fan so I was unable to do the mod.
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