Fan shroud or spacer for Mugen 2...good or bad idea?

[shaolin95]

Hi!
I remember some tests Ive seen a long time ago where using a spacer between the fan and then heatsink actually helped cooling better by minimizing a dead spot or something like that.
Ive been thinking on getting something like that for the Mugen2 and while mounting could get tricky...I am wondering if its worth trying.
In fact I saw a fan spacer/shroud for radiators which has cool LED lights so it would solve my "bling" needs while allowing me to use Scythe Fans.
http://www.frozencpu.com/products/77..._Blue_LED.html
What do you guys think?

Regards

[Oli]

Tried what you propose w/o success months ago. I also thought that minimizing the dead spot could improve cooling but it didn't - at least not measurable.

I removed motor and blades from an old fan and used the empty frame to get 25mm additional distance. Perhaps there is any success with more than 25mm but this will also mean ro run the fan with much more rpm as the static pressure gets worse the more distance you add.

[Floh]

imho those shrouds are mostly obsolete nowadays.
when they were introduced at that time there were a lot industrial fans. these fans had/have the sole purpose to move as much air as possible. speed, noise level or power consumption did (and do) not matter.
todays fans for computers have better designed fan blades to minimize the dead spot below the hub. additionally current heatsinks utilize heatpipes so there is no hot spot right below the hub. the heat is distributed across the whole heatsink surface.

[shaolin95]

Good points indeed.

[sumo]

Hi shaolin95,

nowadays heatsinks and fans for computer "only" use are designed to minimize the negative effect of such Hot spots. In the begining of CPU coolers, made out of a aluminum block, there were more troubles about this isue - because this spot was right over the CPU "Hot Spot". But with the development of heatpipes and such other inovations hot spots are not a isue today.

Kind Regards
Chris