2 Pumps in one loop?

BlackZ06 · Jun 22, 2004

That 2X MCP600 thread got me seriously thinking about this. I haven't installed my watercooling stuff yet so it wouldnt be too much of a hassle to throw in another one. I was thniking of doing it this way

Pump>Y fitting>heatercore>TDX>Bay Reservoir>pumps
Pump>

Bascially have the pumps go into a Y fitting and merge into one and have that one through the rest of the way until it hits the reservoir where it'll seperate again into both pumps/

Would this be like having one super pump or would nothing really happen because of the Y?

Would it be better to keep it all in one line say Pump>HC>TDX>Pump>Res?

fafnir · Jun 23, 2004

Parallel = 80% more flow (assuming free flow)

Series = 60% more head (measured pressure)

see the csx pumps on dtekcustoms for what i'm talking about

fafnir · Jun 23, 2004

i've just recently set up a prescott system with what is two eheim 1046's running in a series and its some pretty good stuff, much higher flow that what i was otherwise getting

prescott, 3/8 tubing, twin lexus IS200/IS300 heatercores, toyota red antifreeze

dropped 30 degrees load off the temps vs the stock intel when oc'ed (3.92ghz, AI7, max vcore; 1.7v?)

was using a eheim 1048 and and the 1046's in the series is better stuff, slight rattle in one of the pumps and i don't know why

p.s. if you don't know what a lexus IS200 is, its alright because i live in sweden

nikhsub1 · Jun 23, 2004

fafnir said:
Parallel = 80% more flow (assuming free flow)

Series = 60% more head (measured pressure)

see the csx pumps on dtekcustoms for what i'm talking about

Wondering where you got those numbers fafnir... they seem quite wrong.

situman · Jun 23, 2004

well if ur gonna use two tiny pumps from dtek (the CS watevers) might as well just get 1 mcp600 with the same performance as those two pumps..

BlackZ06 · Jun 23, 2004

I already have one MCC600. I was thinking anbout adding another one but will most likely just stick with the one. I think it was your post that got me intrigued about it though

situman · Jun 23, 2004

yeah it was my post. if u do decide to go two pumps, make sure ur case is big enough. Now im thinkn about getting a bigger case cause its stupid cramped in there.

squeakygeek · Jun 23, 2004

It definately makes more sense to have one bigger pump than two smaller ones.

fafnir · Jun 24, 2004

nikhsub1, not all pumps apparently; doesn't work with a screw pump, etc

http://www.dtekcustoms.com/index.asp?PageAction=VIEWPROD&ProdID=140&HS=1

near the bottom of the page

csp750 = 2.7 psi
csp-x2 = 5.3 psi

i don't believe those numbers and i'm pretty sure you don't either, but i'm still trying pretty hard right now to get my dual eheim set-up to not rattle, so i don't yet have the *hard* evidence now to support what i've said, but i'm pretty sure i'll have it soon

the eheim in the series *is* giving me better flow, and from what the a crude estimate of the pump head when filling/bleeding the system, i'm getting just a bit over half more head, so i called it 60%

and one of the other things i've tried is a 1/2 y-adapter with two 3/8 inlets, and its also pretty good looking when looking at the free flow

coolroyboy2 · Jun 24, 2004

I will have a second CSP-750 when Dtek gets there stock in . I would be happy to test them if you guys are interested , although I might need a few pointers on how to test the PSI.

fafnir · Jun 25, 2004

hey, coolroyboy2, once you do, could you also test or see if your first pump rattles?

e.g. when attached in a series, does the first pump in the series *always* rattle?

fafnir · Jun 25, 2004

thanks nikhsub1,

nikhsub1 said:
Yes head does theoretically double with 2 like pumps in SERIES. In PARALLEL the max flowrate would double but head would remail that of one pump.

nikhsub1 said:
YES
YES
YES

though, i don't know why;

1. the first pump in my series rattles -->BAD<--, i think its getting worse, and if i swap pumps, its again, the first pump in the series, and i don't think it matters which pump it is, or a defective pump, just the first pump in the series

2. i also don't know why i'm not getting double head either, just a bit over half more water height for the head measurement

though, both them pumps are mounted sideways, am i not supposed to mount them pumps sideways facing each other?

coolroyboy2 · Jun 26, 2004

I'll post here when I get it.
Also if the water is restricted in the loop or the water returning can not keep up with the demand of the 2 pumps pulling ,could that cause the rattle ?

pauldenton · Jun 26, 2004

fafnir said:
thanks nikhsub1,

1. the first pump in my series rattles -->BAD<--, i think its getting worse, and if i swap pumps, its again, the first pump in the series, and i don't think it matters which pump it is, or a defective pump, just the first pump in the series

2. i also don't know why i'm not getting double head either, just a bit over half more water height for the head measurement

though, both them pumps are mounted sideways, am i not supposed to mount them pumps sideways facing each other?

are there other components between the pumps? i seem to recall that 2 pumps one straight after the other can cause problems ...

2 Pumps in one loop?

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