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duel pumps - Page 7

post #61 of 67
Martin we have got to get you a pressure gauge Man...You got it done anyway...Nice job....


Yeah that doesn't seemed to of hurt head at all...You didn't drastically change the volute flow anyway, or at least in the pic's it didn't look like it...


If I were you I would put all this in a thread of its own when you get it done and show how you ported and polished the pump...A lot of guys aren't going to know what you mean when you are talking about the mods you've done to it...Be sure to reserve about the first 4 or 5 replies so that you will have a place to put pic's or they will get all scattered through the thread and it will be hard for anyone to keep up with...We've just stolen this guys thread, he must not mind I guess...


Its looking good....
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post #62 of 67
This thread has been up forever, and the spelling is killing me... it is 'dual pumps', not 'duel pumps' - unless of course, they are fighting pumps
post #63 of 67
Yeah, sorry about the thread hijack, I'll start a new one when I get my results rounded up. Maybe I'll start a couple of thread based on what I'm testing.
    
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post #64 of 67
Yeah that would be good then you can just link from one to another as you need to...Its all looking good....
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post #65 of 67
Any update or a link to your results? Did you do any tests to see if there was a performance difference if you spread the pumps out in a loop instead of just putting them side by side in the loop?
    
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post #66 of 67
These were some of the tests I ran:

Test D is one pump and test C is with two. Note that this is with a D5 vario and basic, so they are not perfectly equal, but a good rule of thumb for running the same pump in series is a 15-30% flow rate gain. This depends on how flat the curve is for the pump and how steep the systems pressure drop curve is.

Running a pump in series essentially stacks the two pump curves in the Y or pressure direction giving you twice the pressure, parallel stacks them in the X or flow rate direction.

You do get twice the pressure in the Y direction, but because friction loss increases and pumping pressure decreases along the curves, the net result is much much less than double.

Series is still always going to be the better setup for real world watercooling, only in extremely free flowing conditions would you get better results in parallel which won't happen in our hobby.

    
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post #67 of 67
sick! nice comp. of results.. 2thumbs
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