which is better... push or pull? - [H]ard|Forum

**.:Burn:.** · #1 10-10-2009, 02:33 PM

i have a mcr320 and 220 and was just curious. is it better to have fans pushing air through the radiators or pulling? or does it matter at all?

**E.E.L. Ambiense** · #2 10-10-2009, 02:42 PM

Whatever's more convenient for the setup.

Everyone who's been around a while in w/c is going to chime in with their thoughts, but I prefer pull myself.

Could split the difference and use both though, assuming you have the room.

**Fafeifa** · #3 10-10-2009, 02:53 PM

Push for fast fans of over +1800rpm, -1300rpm pull works better and doesn't matter if it lies in between.

**.:Burn:.** · #4 10-10-2009, 02:54 PM

ive been wanting to do push/pull on my mcr320, just need to get some 45* fitting and some more fans

**TehQuick** · #5 10-10-2009, 03:24 PM

push is a little better

**.:Burn:.** · #6 10-10-2009, 03:31 PM

ok. thanks for that link

**punkrockpolak** · #7 10-10-2009, 04:08 PM

Quote:

Originally Posted by TehQuick

push is a little better

Like Fafeifa said, push is only better at higher rpm. Pull is better at lower rpm. It even shows that in your linked review

**TehQuick** · #8 10-10-2009, 04:12 PM

Quote:

Originally Posted by punkrockpolak

Like Fafeifa said, push is only better at higher rpm. Pull is better at lower rpm. It even shows that in your linked review

That's why I linked it

**.:Burn:.** · #9 10-10-2009, 11:28 PM

why is it that adding shrouds increase performance?

**Main** · #10 10-11-2009, 12:27 AM

Quote:

Originally Posted by .:Burn:.

why is it that adding shrouds increase performance?

To decrease the deadspot that the fan's motor represents - theoretical stuff mostly - I do not see any difference

A pity that they stopped producing them fans that had the motor in the outer ring, I heard that it was a marine thruster producer that bought the patent. Those fans were hypereffective (speed vs. output) since the impeller was a full face with no motor in the middle. I had one... maybe I still have it somewhere in my "messy" computerworkshop

**bmaverick** · #11 10-11-2009, 11:25 PM

Push if you have a 1 or 2 inch shroud between the fan and rad. Pull if you need to fit in a tight space.

Push needs the shroud gap to overcome the resistance pressure build up of the fan air flow.

**Fafeifa** · #12 10-12-2009, 12:04 AM

with the cost of the shroud and the space utilized you are better off using another set for push/pull.

**rjolin01** · #13 10-12-2009, 08:34 AM

when oyu guys ssay push/pull are you saying have one fan blowing on one side and one pulling on the otherside in the same spot, which would be 4 fans for a 2x120 rad? Or just 2 fans total, on pushing on one spot and the other pulling on the other spot? Sorry if I am just missing the obvious here its early.

**Delemon** · #14 10-12-2009, 12:59 PM

Push/pull on an MCR220 would have two fans pushing and two fans pulling. 3 and 3 for an MCR320.

**DiMeLo** · #15 10-15-2009, 10:05 AM

I always wondered myself which one was better. Thanks for the info.

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