Starting A Bunch of DDC pump testing, What would you want to see?

[Froggy]

I have a DDC-1 I could send you so that you could do dual testing of those pumps to accomodate all the requests that you have received. Now you will want to check the RPM's though.

I have two others in my loop both DDC-1s & one spins at 3400RPM & the other spins at 3800 RPM. They are about a year apart in age, but they have always been at these RPM's since I bought them new.

The one I would send you was bought used & I have zero experience with it. I would check it to make sure it is not dead though.

p.s. I would have posted this back when this thread started, but it has taken this long for my acct. to be activated.

[Martinm210]

I have a DDC-1 I could send you so that you could do dual testing of those pumps to accomodate all the requests that you have received. Now you will want to check the RPM's though.

I have two others in my loop both DDC-1s & one spins at 3400RPM & the other spins at 3800 RPM. They are about a year apart in age, but they have always been at these RPM's since I bought them new.

The one I would send you was bought used & I have zero experience with it. I would check it to make sure it is not dead though.

p.s. I would have posted this back when this thread started, but it has taken this long for my acct. to be activated.

I've got one DDC1, but it's on it's last leg, one of the IC is burnt and it's performance is dismal.

I've have a DDC1, a DDC2, and a DDC 3.2.


I didn't seem to generate much interest in the older DDC1 and DDC2 pumps, so I'm focusing on the current manufactured pumps.

I have most of the DDC3.2 testing done. I just have some G3/8 barbs on their way now to finish up with the EKG3/8 X-top, and I may also be recieving an OClabs top. Then I think I'm going to test the three side inlet tops to get that comparison, and finally the DDC 3.1's.

As many DDC pumps there are, I could be testing a long time. I figured I'd just make sure every test I ran was on the same DDC 3.2 pump to keep it all relative. RPMs is something I should have also picked up while testing, I just didn't think about it at the time.

I might still do the RPM thing for the couple of sample tops I have and see if there is any sort of correlation I can make to flow rate. It might vary with a decent relationship to restriction and if it does, I could probably figure that out and be able to provide some charts on estimating actual flow rate to RPM with a specific top.

Any thoughts on how many DDC1's and DDC2 are still out there? Think it would be worthwhile to test the current tops on them?

Here is the thread I started later with all the results I have so far...
http://www.xtremesystems.org/forums/...hlight=ddc+3.2

[Froggy]

Looking at that pic makes me wonder if the blue impellor of the 3.2 series pump could have that inlet drilled out to increase the flow into that pump.

I would assume there are thousands of DDC-1 & 2's out there. These pumps should last at least 3 years at performance if not 4.5 years.

I am a service tech. for a spa company. We have been using Laing pumps in our spas for 25 years. I have seen older AC D5 style pumps run for 9 years in 24/7 use at 102F+ while in a harsh chemical enviroment. They were the 303 series.

[Froggy]

Speaking of my spa job, we just got a new pump for use as replacement in our spas. It is really light, which tells me it is a rare earth magnetic driven pump. It also has a audible high pitch whine(similar to a D5 but louder) to it when running. It weighs about the same as a DDC but is physically slightly larger than a D5.

For our spa enviroment it is sucking through a 30 sq. ft. paper filter, pumping thru a heater, a mazzei injector, a 1.5" return screen w/ 3/32 holes throughout & about 16-18' of 3/4" PVC vinyl tubing. In that enviroment, it is pushing between 4-5GPM. Now we are after flow & pressure & spas are more about flow but still this pump intrigues me considerably. Let me show some pics to see if it sparks any interest. The comparison pump is my spare DDC-1 for reference. The inlet/outlet is 3/4" FYI. The open impellor design dashes my hopes somewhat for serious pressure capacity, but then again the vanes are twice as tall as what I saw in my D5 & DDC-1's. Maybe the volute top achieves a similar effect.

[Froggy]

One more pic to show the impellor differences while they are not stuck together.

[zLynk]

Sweet! I want an E5.

Martin, the charts look fantastic! I have only one suggestion; correct the Swiftech name on the DDC 3.2 charts to read "MCP355." I haven't gotten my W/C setup built yet, but I have a DDC (10W) setting in the drawer next to me. I'd love to see some charts with tops on the DDC, though understand if it's too much of a bother.

[Xilikon]

Why correct the DDC3.2 to MCP355 ? Swiftech just get the DDC3.2 and relabel them as their own so it's pointless. The DDC3.2 is the universal name.

[alo]

Why correct the DDC3.2 to MCP355 ? Swiftech just get the DDC3.2 and relabel them as their own so it's pointless. The DDC3.2 is the universal name.

I agree. Not only Swiftech sells the Laing pumps!

[eXa]

@ Froggy

50W on that pump, and not to much head pressure for thoose 50W either. Its probably a more flow than pressure pump... wouldnt use it to WC a comp.

[Froggy]

If you go Laing's website, they quote 28W@115VAC for actual usage power consumption. I believe the 50W is startup only. Plus if they make a DC version like the D5, I would guess that the power draw would be lower using DC current.

Take a look at this .pdf to see what I mean- E-5SpecSheet2NOV07.pdf

[Martinm210]

Yeah, that would be a good pump. In the 2 GPM range with 115V, it's only consuming around 22 watts and producing 13 ft of head.

It's still a flow heavy curve, but that would be a good ac pump to use. I'd be curious to see what the volute looks like. Looks like a more efficient exit than the D5.

I just ordered a new manometer good to 20.00 PSI, so before long I'll have the ability to test higher pressure pumps and dual pump setups. My current manometer is a bit limiting at only 200 inches of water (7.22PSI).

[Froggy]

I will take another pic of the volute for you tonight & post up. If you want, I could send you one to test once you get that new manometer.

[Martinm210]

I will take another pic of the volute for you tonight & post up. If you want, I could send you one to test once you get that new manometer.

Sure, but let me get caught up on the rest of my DDC testing first. Just curious, what's the going rate on these AC pumps. Comparable to the D5?

I've got a few pressure drop samples to test, a different pump to test, and some additional DDC top samples coming to test. OClabs is supposed to be sending me a samples and Bitspower told me today that would be sending me one to include. I also have some G3/8" barbs on the way from the good folks at http://www.watercoolingshop.com/ so I can test the EK G3/8" X-Top. Then I'll have them all I think...

As many DDC users as there are, I figured it would be worth the time to get everything tested. I'm also going to do the side inlet tests on the tops that offer that.

I hope someday we'll have the same number of options for the D5...that would be nice!

[Froggy]

Ok here are the pics I promised.

We sell this pump for $165.02 retail.

Now This has at least 1 if not 2 extra layers of distribution, so I would expect the cost to be very similar to D5 pricing if done thru "normal" watercooling industry channels.

[Pedalmonkey]

outlet looks much smaller, could be great if you could give it a bit more presure.

[Martinm210]

Thanks!!! That's a much cleaner exit than the D5. The volute shape appears to be a simple cirular curve...I was hoping to see a spiral.

Interesting and thanks for posting...nice looking pump!

[Froggy]

outlet looks much smaller, could be great if you could give it a bit more presure.

The camera's perspective is throwing you off. The inlet & outlet are both 3/4" i.d.

[zLynk]

Why correct the DDC3.2 to MCP355 ? Swiftech just get the DDC3.2 and relabel them as their own so it's pointless. The DDC3.2 is the universal name.

I agree. Not only Swiftech sells the Laing pumps!

... because a DDC 3.2 is not an MCP655.

[alo]

zLynk, sorry
I think everyone understood that you are talking about first post pics and propose to change "DDC 3.2" to "MCP355"...

But here you are right of course.

[Xilikon]

zLynk, sorry
I think everyone understood that you are talking about first post pics and propose to change "DDC 3.2" to "MCP355"...

But here you are right of course.

Agreed, I missed that typo

[sparks]

Will you be showing and/or testing all the different tops you can put on them?

I am confused,
I have seen some great pics in the past of reservoirs extenders and other tops and before I could decide what to do most have been discontinued.
Bad design, leaks, cracks or ???

Why do so many people bad mouth this pump?
Just because of its small size?
Everyone I see saying its not good have a pump that could be used for lawn irrigation LOL

[Martinm210]

... because a DDC 3.2 is not an MCP655.

Good catch!

I deleted those graphs in the thread. I had somehow subliminally noticed it and fixed it on the website, but those had still remained.

Thanks!

[Martinm210]

Will you be showing and/or testing all the different tops you can put on them?

I am confused,
I have seen some great pics in the past of reservoirs extenders and other tops and before I could decide what to do most have been discontinued.
Bad design, leaks, cracks or ???

Why do so many people bad mouth this pump?
Just because of its small size?
Everyone I see saying its not good have a pump that could be used for lawn irrigation LOL

It is a good pump, it seems most of the past failure problems with the DDC2 has been fixed in the latest revision of the DDC3.2. It's a completely redesigned pump internally.

I'm planning to continue and test everything I can to make this complete. Only missing a few now

[Isriam]

i don't really get the "overvolting" thing. aren't 99% of the people here using 12v leads off their PSU thats powering the mobo? are they 13.0v or 12.0v? i don't see a point in testing over 12.5v unless people are running dedicated power supplies for their pumps, and i doubt that is very many.

[Xilikon]

i don't really get the "overvolting" thing. aren't 99% of the people here using 12v leads off their PSU thats powering the mobo? are they 13.0v or 12.0v? i don't see a point in testing over 12.5v unless people are running dedicated power supplies for their pumps, and i doubt that is very many.

Yes, overvolting is only done on a dedicated power supply or a pump controller. For the bunch who run them off a molex, it's useless. However, it's interesting to see how much gain is present when overvolting and so far, it's not that much.