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What can I use to space my fans off a 2 X 120mm radiator? - Page 2

post #11 of 13
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There is actually a difference and that review shows it. Also he's not using a 240mm radiator like me, he's using a 120mm. He's also not using a fan that excels with radiators like a Delta FFB, which I'll probably be using. If he was, he might have seen more of a difference. They create more static pressure than typical tubeaxial frames, because of the stationary reversed fins on the back, similar to contra-rotating propellers. It comes at the cost of slightly more noise, but with the benefit of needing less RPMs and less energy. You can get contra-rotating fans from Delta, but they're big and expensive, and overkill. If he was using a 240mm or larger radiator and a fan model with higher static pressure, I think he probably would have noticed a larger difference in performance. If you get a a degree or two difference with the setup he was using, imagine how good it would be with a 360mm radiator and triple 120x38 FFB Delta's. I'd like to see someone do that.
Edited by Drahadis - 9/21/13 at 11:50am
post #12 of 13
IIRC it helped the RS radiator in pull, but it was still behind pushd + no shroud.

It'd be helpful if you could share your experience.
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post #13 of 13
Quote:
Originally Posted by Drahadis View Post

There is actually a difference and that review shows it. Also he's not using a 240mm radiator like me, he's using a 120mm. He's also not using a fan that excels with radiators like a Delta FFB, which I'll probably be using. If he was, he might have seen more of a difference. They create more static pressure than typical tubeaxial frames, because of the stationary reversed fins on the back, similar to contra-rotating propellers. It comes at the cost of slightly more noise, but with the benefit of needing less RPMs and less energy. You can get contra-rotating fans from Delta, but they're big and expensive, and overkill. If he was using a 240mm or larger radiator and a fan model with higher static pressure, I think he probably would have noticed a larger difference in performance. If you get a a degree or two difference with the setup he was using, imagine how good it would be with a 360mm radiator and triple 120x38 FFB Delta's. I'd like to see someone do that.

Because he does the testing for delta temperatures it does not matter what size radiator he uses 1x120 2x120 3x120 4x120 etc it would scale the same. His tests don't show that shrouds are useless though... they show that it is very much up in the air. In another test though he did show that the shroud was less important to not important with high speed fans yet quite important on low speed fans. So there really is no answer. You can be certain it doesn't hurt to seal things up and some shrouds make it easier to seal things.
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