Cooling Modding a Laing DDC Pump to Increase Flow

Gainward 6800Ultra GS with an NV-68 currently running at 43 degrees and very nearly silent

It was worth it for sure

 

Has anyone here had any issues with their DDC 12v pump not starting?

I had one and it had this issue where it didn't always start spinning when given power, it would need to be tapped/jiggled before it started.

I believe they're shipping newer version now with a third wire.
I'm not sure if these revisions have the non-starting issue resolved though.

Anyone on here got any other info regarding this?
I'm keen to get another one as it was soo quiet but I don't wanna fry everything because it didn't start...

One thing I did notice was that modding the intake to remove the right-angle seemed to improve it.

 

Removing the right angle does improve it. Centrifugal pumps do not like their inlet restricted at all, and it seems that Laing really pushed the boat on feasibility when they incorporated that elbow in their design (for practical reasons, obviously, but it is hardly ideal). Removing it has been found to increases pump performance quite nicely.

 

How would this modded pump compare to say my MAG5?

 

Nah, you don't need a CNC machine to do that (would be overkill actually, unless you got some crazy funky curves going on), just need a regular ole' Bridgeport.

-L6

 

Volunteering?

 

Sure, if you send me a pump. Otherwise I have no real reason to... so, will you send me a pump?

-L6

 

Good job, I bet it's quiet and doing the job real good paul

- S

 

Whats happening with these little pumps, I really liked the look of them and was thinking about getting 2 to mod but when I dropped over to the Coolercases forum it seems like everyone is RMAing them because of start issues. Has this been sorted or are these pumps a no no

 

Well, glad it worked out well for you CM

 

All i can do is return these pumps to Laing for testing as i don't have the facilities to test them myself.

To date, it looks like this could be the 3rd DDC pump with a reported fault out of two batches of 12 and 24 units.

I'm confident with these pumps to the extent i'm now using them in all three Wavemasters and all seem to be working good.

NOTE: Anyone that does have one that they want me to return to Laing, e-mail me at enquiries@coolercases.co.uk and i'll arrange to have them returned to Laing for testing and let them have the final decision.

Obviously i will stand by whatever decision that Laing come to, however the satisfaction of Coolercases customers is paramount in any item purchased from our store and i personally will endeavour to make customer satisfaction a priority whether that involves a refund or exchange.

 

As usual your customer service is excellent, if it's only 3 in 36 units then I might take my chances

 

I realise that I may be way off base here, as I have yet to begin my training in the mystical art of Watercooling-Fu , but as Nexxo said that centrifugal pumps improve their performance from having their inlet restriction reduced... what if you were to widen the inlet to 3/4" like Nexxo did on his Metaversa? Or is that not possible on that pump?

 

Nexxo didn't modify the pump, iirc, just used a large line to connect it to the modded res.

There are issues on modifying pumps - have a read here. The poster is an engineer working on the CSP-Mag pump.

 

LOL.......not really what i wanted to hear considering i'm running 2 modded DDC's

Having said that, not much would get modded if people kept saying don't do this........don't do that.

Sometimes you just got to suck it and see!

 

anyone want to send me the critical dimensions on the plate needed for one of these pumps and ill sort out some CAD drawings for a fully 1/2" barb replacement top, might even be able to get one made. I don't have a watercooling setup but haven't had a play with CAD in a while and fancy firing up unigraphics again.

Oh and the dims for the thread etc on standard 1/2" barbs.

 

That's right. The pump comes with a 3/4" ID inlet and outlet barb. Although you can restrict the outlet barb safely (which I did, screwing in a 10mm ID barb), you want to respect the original ID of the inlet barb to prevent cavitation and performance issues.

 

Take a look and see the same mod done with performance data based on calibrated equipment ...

http://www.systemcooling.com/mcp350_mod-01.html

Lee did this to one of our pumps.



Here's the before and after modded pump curves.




Peace!

Stev

 

Just a quick note to mention that others have had this same problem with the Laing DDC. We had a guy post on the [H] from Singapore with the same problem. So I think this problem is pretty widespread.

 

The problem isn't as wide spread as mentioned above. Laing had a bad batch of pump IC's and have replaced, at their cost, the pumps for users.

If you have one of the few pumps that have start-up issues and are in North America, you can contact Laing directly for a replacement. You'll need to send them the original pump back.

Mike Solso
Industrial Division Manager
Laing Thermotech, Inc.
830 Bay Blvd., Suite 101
Chula Vista, CA 91911
Direct Ph: (619) 591-2460
Direct Fax: (619) 591-2461
Mobile: (951) 515-9044
http://www.lainginc.com

And thank-you Coolmiester for the extened offer to help out on the UK side.