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Modding Corsair H80i: increase flow area

post #1 of 8
Thread Starter 
Hello
I am thinking of modding my Corsair H80i to increase the effective flow area.

The H80i cooler has a cooler entry area of 114mm x 120mm. That is 13680mm2.

A 120mm fan has an outside diameter of 115mm and an internal hub diameter of 46mm. That gives a flow area of 8725mm2.

Since the fan is placed close to the cooler inlet, the air flow from the fan cannot really fill up the complete cooler inlet. Only the portion 8725/13680 = 64% is used. On top of that, the 120mm fan is a bit small and there is leakage between the fan and the cooler.

So I would make a shroud between the fan and the cooler to exposes the full cooler inlet area -> 100% and which seals of the sides..

Using a gutted 120mm fan (without the hub) as a shroud would only expose 76% of the cooler inlet area (and still have leakage).

A shroud which exposes the full cooler inlet area of 13680mm2 would be ideally matched with a 140mm fan which has a flow area of 12650mm2.

By making such a system, theoretically the cooler flow area would increase by 56% which could then be used for either stronger cooling or slower quieter fans in a silent system.
Theoretically, such a system would have a larger flow area than a H100i cooler (2x120mm fans, 27mm thick compared to H80i 38mm).

I have not made it yet. Just a plan. I would welcome any comments or suggestions. Anyone who has tried it out already (on any water cooler)?
post #2 of 8
interesting mathematics there.

I'll sub to this.
post #3 of 8
I have shrouds on mine. Not a new idea. Temps dropped around 2-3C. W/ my fans at max, I have 5-7C cooler temps than stock fans w/ shrouds.
 
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Gsvlip Dudyrm
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post #4 of 8
Thread Starter 
Quote:
Originally Posted by Lord Xeb View Post

I have shrouds on mine. Not a new idea. Temps dropped around 2-3C. W/ my fans at max, I have 5-7C cooler temps than stock fans w/ shrouds.

hello Lord
Thanks for the reply.
What kind of shroud did you use? Did it open up the full cooler inlet area, or only a portion? With stock fans close to the cooler, what percentage of the cooler inlet area is used?
post #5 of 8
Quote:
Originally Posted by turboman View Post

Quote:
Originally Posted by Lord Xeb View Post

I have shrouds on mine. Not a new idea. Temps dropped around 2-3C. W/ my fans at max, I have 5-7C cooler temps than stock fans w/ shrouds.

hello Lord
Thanks for the reply.
What kind of shroud did you use? Did it open up the full cooler inlet area, or only a portion? With stock fans close to the cooler, what percentage of the cooler inlet area is used?

Call me Xeb like everyone else. I am not a topic of worship wink.gif

Anyways, I just took plain Jane 120mm fans (120x25mm) and gutted them. It definitely helps in getting rid of the deadspot behind the fan, but I feel you need at least 50mm shroud to full depreciate dead spot. Simply not worth doing.

Also, I am not doing any kind of math for this. Right now with how things are, I have about 7C drop compared to stock.
Edited by Lord Xeb - 12/6/12 at 9:22pm
 
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Gsvlip Dudyrm
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Oda'maksv
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post #6 of 8

I also ran 2 gutted fans as shrouds on my H100 with 2 Gentle Typhoon AP-15's and wrapped black hockey tape around it all to cover all air holes:

 

LL

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CHILZ - Lan Rig
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CANARY - Main Rig
(16 items)
 
CADILLAC - HTPC
(14 items)
 
CPUMotherboardGraphicsRAM
Intel i5-4570s Asus H97M-Plus AMD R9 280 G.Skill RipjawsX 16 GB (2x8) 
Hard DriveHard DriveHard DriveCooling
250 GB Samsung 840 240 GB Kingston 3 TB USB 3.0 Drive Custom Loop 
OSMonitorKeyboardPower
Windows 10 Preview BenQ GL2450 Filco MajesTouch2 Ninja PC P&C Silencer Mk III 600 W 
CaseMouseMouse PadAudio
Fractal Design Core 1000 Mionix Castor Monoprice XXL JL Amps + Custom Morel Bookshelf speakers 
Other
Scythe Kama-Panel 3 
CPUMotherboardGraphicsRAM
FX-8150 @ 4.6 GHz Fatal1ty 990FX Pro 9800 GTX+ 512 MB G.Skill Ripjaws X 1866 CL9 
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post #7 of 8
Thread Starter 
I am new here and I just saw that there is a thread for Corsair Hydro Series Club. If possible can an admin move these posts to that thread.
Thanks.
post #8 of 8
Too much work to do that. Just post a link in the thread. ^_~
 
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Gsvlip Dudyrm
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Oda'maksv
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CPUMotherboardGraphicsRAM
3770k @ 4.5 1.312 load Zotac Z77 ITX Wifi GTX 1070 Gaming 2126/2249 w/ Hybrid cooler TridentX 16GB 2400MHz 
Hard DriveHard DriveCoolingCooling
Samsung 850 Pro 1TB Seagate 2TB H105 EVGA Hybrid GPU cooler 
OSMonitorKeyboardPower
Windows 10 Asus MG279Q - 24" 144Hz 1080p Filco Majestic II w/ Cherry Reds Seasonic X 760W 
CaseMouseMouse PadAudio
Bitfelix Prodigy Logitech G400 Razer Goliath AKG A701 
AudioAudio
JDS Labs Objective 2 JDS Labs ODAC 
CPUMotherboardGraphicsRAM
Core i5 750 3.99 (190x21) 1.376v Load ASUS P7P55d-E Pro GTX 670 FTW <- Poor overclocker :( 8GB (4x2GB) G.Skill DDR3 1600 
Hard DriveHard DriveOptical DriveOS
Samsung 830 Evo 128GB 2x 2TB  Some DVD drive OSX 10.10.4 
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Asus 1080P Crap TX 750 HAF 922 G400s 
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Apple Keyboard Xbox One controler 
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