Yep it's not a true volumetric pump (too weak) with a constant flowrate in any situations (according to its mechanical specs).

Thanx so much for sharing your knowledge with a water noob like me :p I'm hardly trying to setup my first WC setup...

Adriano

Great information, what makes it even better is that I bought the AquaXtreme 50Z-DC12 before reading it and it confirms my choice.

Thanks

This has been a slightly exhausting thread to read, mostly because a lot of the technical stuff goes over my head. I'd like to ask one question . Is it ok to put 13.8 volts through a D4 or is this a bad idea

Fine. That pump can tolerate more voltage, I'd say up to 16v or so, but as always, YMMV when overvolting/overclocking.

If I remember right, the original atleast was good up to 20~24v because of its original use in solar.

jeez, read the pump specs, 24V is a different motor

Ok Bill, I'll ask you, will it be a problem if I shoot 13.8 volts through a D4/650. If it's not a problem will it help performance?

Edit: sp

more volts = more power/rpm = more noise = shorter life (taken to extremes)
13.8V is fine, not too much ripple eh ?

I have an AIM 6 amp precision regulated low ripple power supply laying around. Thought I'd put it to good use if it'd be ok. Volt meter says it's putting out 13.57v

sorry for digging up a thread, but Cathar, i know you have an iwaki RD-30 now, how much heat (w) does that dump into the loop?

-Justin

It dumps around 80% of its power draw into the loop as heat. At 18v in achieves something like 7.5mH2O of peak pressure, around 20LPM of peak flow, and draws around 30W of power when installed in a system. Those figures are from memory. Am not at my desk in Australia where I wrote them all down.

why is this not a sticky already?? =)

This is confusing me a little bit.
At 60Hz the head and flow is larger, yet according to Iwaki's PDF the amount of heat dumped into the water stays the same.
So the 60Hz version should definately perform better, right? :shrug:

I'll be testing a few pumps myself soon, and I don't want to make mistakes.


EDIT:
Unless of course by output they mean the amount of heat transferred to the air? :confused:
If that is the case then the amount of heat dumped into a loop by the 30RZ is very low; that's very unlikely.
I guess their numbers are just way off...

afaik motor input is the power draw (higher at 60hz due to the higher motor speed) - if you look back on page 1 cathar has a 30RZ at 50hz dumping 50W into the loop (this was obtained from experiment iirc as that's the pump cathar used to have, on his 50hz aussie mains.)

so assuming the same % of input transmitted to the water that'd give about 64W at 60hz...

not sure what output is in the PDF?

MaxxxRacer has posted some numbers about the input of his MD-20R; they're way lower than Iwaki's numbers. :shrug:

In a few months I should have my own numbers on the MD-20R (at 50Hz).

Cathar, can you tell us how you measured the heat dumped by the Iwaki pumps?

I have to say that this thread is chock full of EXTREMELY good info. It does deserve sticky status (unless some good objection comes up).

Not sure if this is the right place for this query please move if inappropriate
I have this pump and I wondered if anyone had done a scientific comparison in relation to the pumps that normally make the shortlist?.
http://www.alphacool.de/perl/shop.pl...1&art_id=13106
and

If the specs are believable, around D4 performance, but that 8W sounds too optimistic given the stated performance.

I know this may sound silly, but I'm in the process of making my own wc system. Wondering if a magnum 350 Here http://www.marineland.com/products/c...con_magnum.asp
will work. A lot of this forum seems to be over my head, but would be grateful for any ideas. Also wanted to use the evaporator from an air conditioner with fans to exchange heat.... Thanks, and great forum!

magnetic field affects the hard drives
 

http://www.aqua-computer.de/download...040425engl.pdf

In this Aqua manual, they said on page 25 of the manual that "since the pump includes a synchronous motor, it generates a magnetic field as any electromagnetic motor. Also there is a rather powerful permanent magnet inside the pum. This magnet rotates and creates a changing magnetic field too.

"For this reason keep a safety distance of at least 0.5m to all sensible devices such as hard drive, screens and so on."

Now, eventhough Aqua is talking their own pump, surely the above applies to all pumps. But I notice w/ so many pic. posted from various users, that their pumps are quite close to other sensible devices, i.e., their hard drive.

Does anyone cares about loss of data?

Indiana: you are looking at a canister filter. That won't be of much use to you in building a water cooling system. Sorry. Read through some more posts on this forum to get some general knowledge about water cooling.

Yes, I agree... I will have to locate something with high positive pressure.

most pumps are shielded i believe ..... eheim 1048+ are (but 1046 isn't....)

Warnings exist to protect the company from lawsuits, and thus err on the side of caution.
DansData did some testing with a HDD and a "powerful" magnet, and couldn't get the HDD to fail.
Your results may differ, always read the label, the authors comments above are not a binding statement and merely an opinion. Consult your doctor if pain persists and read the license before opening the software.

I finally got my Storm G4 system setup in the beginning of June (well, I guess it's been a while :p), anyhow, I was looking at the performance curves to approximate the flow rate of my system. I noticed, however, that the curves are based on a system that consists of a Thermochill HE120.2, where I have a 120.3. How much more resistance is there with an HE120.3 vs. a HE120.2?

Jump down to Graph 17.

Thanks a lot! That helps out :D.

Cather i'm a newbie so just wanna check with u about the MCP600 and MCP650? it spec said both are a 12V pump but the conclusion u written 13.8v right? how u change it to 13.8v? and right now there are a MCP655 pump and does it perform better than MCP600? Thanks alot and sorry for the noob question.

Re: How much pump is enough? How much is too much?
 

hello, i have an mcp350 running a swiftech 120mm rad,asetek antarctica cpu block,
asetek gpu block,with a swiftech 5.25" bay res.
my chip is a 64 3000+@2430mhz.my temps are usually around 25-30c for the cpu(depending on ambient temp)and 36-40c gpu.
is this pump good enough?.
thanks guys.
p.s. how can i get my pics in here?