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push or pull for radiators?

post #1 of 14
Thread Starter 
i have my two swiftech 220 qp's at the top of my case
and i bought 4x SCYTHE S-FLEX SFF21F (as all the reviews
i read through, slientpc wise, for their price they were down,
not 25 bucks like the noctua's, 12$) for these 240mm rads.

question is, i've seen people only using pull methods for their rads, that being
(airflow is <=== way)
FAN|RAD

why not a push pull system?
FAN|RAD|FAN

or simply a push system?
RAD|FAN

which would be better, push, pull or pushpull.
and i heard that for these rads you get better temps
for higher cfm fans, (no worries about high rpm, i got a nice controller)

thanks!
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post #2 of 14
IMHO doesn't matter. What matters is the flow restriction on the pump. Your pump is designed to push water up a column. Not suck water up a column.

In other words, however you arrange things, try to have gravity feed back into the pump inlet. That's why I place the pump at the bottom of the case and the outlet pumps into the radiator first. The rad being the highest component in the loop.

Learned that from building a saltwater tank. There is no quicker way to burn out a pump then to restrict it's intake.
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post #3 of 14
Well you figure push/pull at the same time would be the best. Second would probably be pull, then push. IMO
post #4 of 14
Quote:
Originally Posted by Hailscott View Post
Well you figure push/pull at the same time would be the best. Second would probably be pull, then push. IMO

Same thing as a car, while you drive, the wind blows throught the rad and the fan PULLS the air towards the engine bay.

I would PUSH because it would be going against the oncomming wind.

sorry typo here

I meant that IF IT would push,it would be going against the oncomming wind.

So pull is better
post #5 of 14
Pulling air, is way better. I get a 2c drop when pulling air.
    
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post #6 of 14
Quote:
Originally Posted by HellyHans View Post
Same thing as a car, while you drive, the wind blows throught the rad and the fan PULLS the air towards the engine bay.

I would PUSH because it would be going against the oncomming wind.
But when a car is stopped the radiator fan pulls. At least on my car it does.
post #7 of 14
Whichever you decide, try this: Take two el-cheapo 120mm fans and gut them. Cut out the fan and support struts leaving just the shroud. Then cut or hacksaw one side of each shroud. Place the shrouds on the rad first with the open sides facing each other. Then bolt the fans to the empty shrouds.

The biggest problem with fans are the dead spots when placed up against the rad. These empty shroud spacers will allow the air to flow completely through the rad.
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post #8 of 14
I will make me some shrouds for my triple panflows 114cfm

Sounds like they would push more air through them...

What is the optimal thicknes of that the shrouds should be if I made them out of som,eting other than elcheepo fans...max and min please and does shroud size change do to the cfm output of a fan
    
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post #9 of 14
I always pull... On thin rads like a BIP I don't think it matters as much...Transonic did this test...


.....http://www.overclock.net/water-cooli...diators-2.html
Poll: Push or pull configuration for Radiators - Page 2 -
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post #10 of 14
Quote:
Originally Posted by FrankenPC View Post
Whichever you decide, try this: Take two el-cheapo 120mm fans and gut them. Cut out the fan and support struts leaving just the shroud. Then cut or hacksaw one side of each shroud. Place the shrouds on the rad first with the open sides facing each other. Then bolt the fans to the empty shrouds.

The biggest problem with fans are the dead spots when placed up against the rad. These empty shroud spacers will allow the air to flow completely through the rad.
thats similar to what i did i gut the 120mm fan and used a rotar tool and cut the sides out and just left enought plastic to keep it all 1 peice but i have all 4 sides open on the moded fan
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