Swiftech MCP35X vs MCP355 / Laing DDC2 (DIYINHK Modded) - Flow Rate Test

[[AK]Zip]

First of all I want to say this is not a scientific test I just did it for fun since it is a very good visual test. Once I gather a few other configurations I will do an actual test with a spl meter, flow meter, and manometer.

A stock Swiftech MCP35X with a revision 2 reservoir vs an early Swiftech MCP355 (DDC2) with an OCLabs top and a modified DIYINHK upgrade controller board. This test is not scientific, but quite obvious.

If someone has a dead (or functional) MCP350/355/35X or Laing DDC pump which they are willing to send in I would be able to create a full instructional video of how to install the upgrade board into your pump.

The DIYINHK board is available on eBay.

[CedricFP]

So that PCB board replacement can handle how much voltage for long periods of on time? At 17v the sound it makes is pretty audible, but the flow does look insanely fast. It would be great to see how head pressure reacts to increased loop restriction versus the MCP35x.

PS: Nice vid. Thanks for that. I had heard the legends that were the DDC2's, but never owned a DDC until the 3.2 waltzed along... now sort of wishing I had so I could mod it.

[Martinm210]

Thanks for the Vid...the DDC2 must have more windings than the DDC1. It appears to act similar to how it ran on the DDC3 series.

It's a bit loud compared to the Laing controller, but it's pretty intense on power.

[lowfat]

Ordered another two DIYINHK PCB's w/ the Toshiba controller to try to fix all of my DDC3.1/DDC3.2's. Hopefully I am able to get it to work this time around.

[[AK]Zip]

The max of what the board can do will be significantly higher than what the pump itself would be able to withstand. I probably wouldn't suggest anything above 20-25v even with a heatsink. I just got my hands on all of this so I still have a lot of testing to do to see how far this can be taken reliably.

I would really love to get my hand on a DDC1 and a DDC3 so I can run tests on all 3 and see how much difference there is between the actual pumps as well as how important an upgrade top becomes with such a high flow rate and pressure. I would also be able to make a video for the full installation of the board. I had already made one video doing just that, but my hard drive failed before I finished editing so I lost all of it.

[lowfat]

With the DDC3 you really don't want to use more than 12V w/ the Toshiba controller. It alright runs insanely fast at that speed. I'd be willing to send you a pair of DDC3.2's if you wanted to install the PCB's and take videos or whatever, but chances are shipping to Texas from here would be outrageous.

[Martinm210]

FYI, here is the Toshiba technical doc. Current max is 2.5 amps, but it appears you were able to draw a bit more than that in your video. It also has a 150C Tjmax protection of sorts that you may run into if ran for a longer duration.

http://www.toshiba-components.com/mo...20_080424_.pdf

[[AK]Zip]

Yes I have no idea what shipping to Texas would be like so may not be worth while.

Martin I have seen the data sheet for the controller, but not read through all of it yet. Output current is 2.5A max. The reason I was above that is probably because the chip itself draws power so where I was should be around the max, but my other power supply is currently in use on another project so I was not able to test above 3A. I haven't read over the full data sheet yet, but there should be overcurrent protection built in. 150C Tjmax is quite high so I don't think that could be reached without very high voltage/current involved.

[bmaverick]

Somebody must have a hoard of MCP350 DDC-1 pumps out there.... Finding the pump maverick would be my first guess.

And shipping to Texas isn't that hard either.

Any clues Martin?

[[AK]Zip]

Somebody must have a hoard of MCP350 DDC-1 pumps out there.... Finding the pump maverick would be my first guess.

And shipping to Texas isn't that hard either.

Any clues Martin?

I must be missing something here. Are you the pump maverick? What good does it do me?

[bmaverick]

I must be missing something here. Are you the pump maverick? What good does it do me?

Well, I have a few hundred DDC-1 & DDC-1T OEM style of the MCP350 pumps. All are new with the 50,000 run hour life fully intact. On another forum FS thread people are grabbing a few up.

Prior to shipping a pump out, I place each pump into a PCB diagnostics tester. It will let me know if the pump is good or not. Once in a while a bad one will arise. I have been saving these bad ones just in case a person needs a replacement black impeller, o-ring, mounting screws or a spare top to modify into a 1/2-inch inlet.

As of the past two months, the DIY PCB's have arrived. This makes my bad PCB pumps a little jem for the DIYINHK mods. Martin has already done one or two already with some testing. http://martinsliquidlab.org/2011/03/...g-ddc-1-ddc-1t

So, if you are interested to take the plunge, PM me and we can work out some details.

BMaverick, meeting your DDC-1 pump needs

[CedricFP]

What readily buyable pump on the market is comparable the DDC1 / Sanyo PCB?

[[AK]Zip]

I wanted to just make a quick note regarding this board and how far to take it. Using the stock capacitors do NOT go above 16v. If you change the capacitors you can go higher, but at some point the current will be too high for the IC and it will fail. Based on the current information I would suggest maxing out at 16v or just below that unless you know what your doing.

What readily buyable pump on the market is comparable the DDC1 / Sanyo PCB?

The DDC3.2 probably comes closest for production pumps now. If you want the DDC1 with Sanyo PCB then buy a DDC1 and the Sanyo PCB. I will PM you with some additional information regarding acquiring the DDC1 pump.