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Pumps in Series

post #1 of 15
Thread Starter 
I'm about to throw in a bay res into my loop, which means I'm running 2 reservoirs.

I currently have my loop going like this; cylinder res, pump 1, pump 2, rad, gpu, gpu, CPU , res.

Now as mentioned I'm adding a bay res to the loop and wanted to run the loop this way; bay res, pump 1, gpu, gpu, CPU, cylinder res, pump 2, rad, back to bay res

Now would that still be considered series? Would running them like that hurt performance? Cause having them 1 after another is kick ass currently...
post #2 of 15
Have you got the pump, for a loop that size you really don't need 2 pumps.

If you have 2 rads then maybe look at a dual loop?
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post #3 of 15
Thread Starter 
Quote:
Originally Posted by andrewmchugh View Post
Have you got the pump, for a loop that size you really don't need 2 pumps.
I have a highly restrictive loop, when running 1 mcp35x my flowrate was 3.1 lpm, which is under the desired 1 gallon per minute. So after adding the second pump, my flowrate has jumped up to 5.1 lpm.

Temps have reduced by 5-6 degrees.

Now adding the bay res is purely aesthetics! Lol. I have a TJ 11 and the bay drives are looking bare.

http://ocau.com/pix/v5e5w ( I have removed the 120.1 rad on top of res )
http://ocau.com/pix/ficbq
http://ocau.com/pix/knvxh
Edited by badjz - 10/14/11 at 11:19am
post #4 of 15
Running them like that will be OK and might even help reduce the resonance/harmonics with 2 pumps in the loop.

What do you have in the loop that's causing so much restriction* as I'm running 3 quad rads, CPU block, 2 FC GPU Blocks, Mosfet Blocks and a chipset block with about 9' of tubing and can run it from a single 35X (at full speed) without a performance hit? I only run 2 pumps for redundancy.

3.1 lpm is pretty close to the 3.85 lpm you need so I'm surprised you have such a difference in temps with the additional pump.



Edit: *Let me have a guess, Swiftech Apogee and a pair of MCW82s?
Edited by Big Elf - 10/14/11 at 12:04pm
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post #5 of 15
Thread Starter 
Edit: *Let me have a guess, Swiftech Apogee and a pair of MCW82s?[/QUOTE]

Lol actually not.

HW labs Gtx 560 rad
2 x NX580 Koolance Blocks ( no parallel )
CPU 370 Koolance block
Aqua Computers flow rate sensor
Frozenq t virus res
I set of QDC, and 15 bitspower comps. 6 45s, 2 90s.
Primoflex 1/2" 3/4"

Yeah I know, I'm stumped as to why it's so restrictive. Well to be completely honest I was running an aquastram xt ultra and my flow rate was 2.4lpm. So I got myself a 35x. I measured flow, it was 3.1lpm. So I ran another 35x. The diff in temps is comparing 2.4lpm vs 5.1lpm

So it's ok to run the pumps as mentioned?
Edited by badjz - 10/14/11 at 3:14pm
post #6 of 15
I've run them with one feeding directly into the other and at the moment I use pump>rad>pump>rads>blocks>res. Either way works but there's slightly less noise with the pumps separated.

Using Martin's Rad Optimiser spreadsheet http://martinsliquidlab.org/pump-and...r-spreadsheet/ and choosing the parts that are closest to the ones you use suggests that a single 35X at full speed should be enough although on the limit.
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post #7 of 15
Thread Starter 
Quote:
Originally Posted by Big Elf View Post
I've run them with one feeding directly into the other and at the moment I use pump>rad>pump>rads>blocks>res. Either way works but there's slightly less noise with the pumps separated.

Using Martin's Rad Optimiser spreadsheet http://martinsliquidlab.org/pump-and...r-spreadsheet/ and choosing the parts that are closest to the ones you use suggests that a single 35X at full speed should be enough although on the limit.
Agree. But the restriction is def there. I have re done my loop with subtle changes 20 odd times. No change in flow when using the aquastream. Ah well 2 pumps it is, atleast this way if I decide to add moar rad, moat block, etc, I have the headroom flow rate wise.
post #8 of 15
Quote:
Originally Posted by badjz View Post
Agree. But the restriction is def there. I have re done my loop with subtle changes 20 odd times. No change in flow when using the aquastream. Ah well 2 pumps it is, atleast this way if I decide to add moar rad, moat block, etc, I have the headroom flow rate wise.
There's something else going on cuz 3 blocks does not make a serious restriction.
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post #9 of 15
I can never figure how to get that rad optmiser to work
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post #10 of 15
Thread Starter 
Quote:
Originally Posted by tsm106 View Post
There's something else going on cuz 3 blocks does not make a serious restriction.
Like what though? I def can't work it out. There are no kinked tubes, no blockages, and I'm using straight dis water....
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