450gph vs. 317gph?

O

OcX

Member

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Joined

Sep 10, 2005

• Jun 19, 2007

• #1

Old Pump: Hydor Seltz L35 I
-AC Powered
-450gph
-80in Pump Head

New Pump: Swiftech MCP655
-12v DC Powered
-317gph
-120in Pump Head

Do you expect I will see a temperature difference +/-? I've got all the temperature data on the Hydor pump recorded so I'll have some results to post before Friday.

Do you think the Swiftech has more pressure with would improve the Storm's ability to cool? Ceterius Paribus.

 

Otter

Senior Member

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Joined

Jun 11, 2004

• Jun 19, 2007

• #2

It depends on the shape of the PQ curves and how many watts each pump dumps into the loop, but yes, the higher head pump will probably give you slightly better temps.

 

billb

Member

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Joined

Mar 31, 2005

• Jun 19, 2007

• #3

Otter said:

It depends on the shape of the PQ curves and how many watts each pump dumps into the loop, but yes, the higher head pump will probably give you slightly better temps.

Click to expand...

Yes, you need PQ curves andhgeat dump info. Not your pumps, but you can get an idea...

And here's an interesting thread on pump selection.
http://forums.procooling.com/vbb/showthread.php?t=10825&highlight=how+to+choose

 

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samuknow

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Joined

Feb 19, 2001

Location

Indianapolis, IN

• Jun 19, 2007

• #4

But there comes a point when flow rate makes no difference.

You can have a 1000 LPH and it may not change temps at all from a 50 LPH system.

 

Otter

Senior Member

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Joined

Jun 11, 2004

• Jun 21, 2007

• #5

I wouldn't expect any major improvement from the 655, but it's hard to say without knowing more about the Hydor. If it has a really steep PQ curve, you might have an abysmally low flow rate with the Storm. I wouldn't bet on gains of more than one or two C, though. As long as you've got both pumps, the best way to find out is to try it.

 

OP

O

OcX

Member

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Joined

Sep 10, 2005

• Aug 2, 2007

• Thread Starter
• #6

Update:

There was no noticeable gain or loss with switching from Hydor L35 to a Swiftech 655. The noise levels with the 655 are inaudible compared to my Fans, cant say the same for HydorL35.

The temps all remained the same for this single block loop, regardless of Pump head or GPH.

 

Otter

Senior Member

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Joined

Jun 11, 2004

• Aug 3, 2007

• #7

That's not surprising. Flow rate doesn't affect either modern blocks or rads very dramatically, and a stronger pump usually means more heat in the loop. Hence, performance is about the same with a wide range of pumps.

Thanks for posting your results.