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MCP 355 Pump is LOUD! - Page 2

post #11 of 21
I was in the same boat as you recently. Used to get headaches from the high pitched pump whine. I modified my MCP355 (converted it to 3pin) and connected it to a fan controller to be able to control the pump speed. IIRC that pump runs full bore at around 4200-4400RPM, I was running it at ~3000RPM. That helped a little, but the best advice has already been given earlier in this thread. You must decouple it from your case before you can make it silent.
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post #12 of 21
Quote:
Originally Posted by tsm106 View Post

You do not want to use foam or velcro, as either method has serious downsides. Get a pump stand or mount it off the tubing.

Totally disagree. Before I had my PMP-400 suspended by the tubing, I had adhesive backed velcro strips on the reservoir. I mounted a wooden block (3" piece of 2X4 actually) to the case. I then glued a dense foam to the block. I put the other side of the velcro strip on the foam.

Noise practically gone, yet it was easy to remove or adjust the pump. Very little vibration was transmitted to the case, and, vibrations are the issue, as that is what causes the noise.
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post #13 of 21
Quote:
Originally Posted by Capt Proton View Post

Totally disagree. Before I had my PMP-400 suspended by the tubing, I had adhesive backed velcro strips on the reservoir. I mounted a wooden block (3" piece of 2X4 actually) to the case. I then glued a dense foam to the block. I put the other side of the velcro strip on the foam.
Noise practically gone, yet it was easy to remove or adjust the pump. Very little vibration was transmitted to the case, and, vibrations are the issue, as that is what causes the noise.


That's not the same thing. Go try velcroing the actual pump to your case.
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post #14 of 21
True enough. Using foam is seen on several videos Martin made to show the effectiveness of decoupling, so I can't say the use of foam of itself has serious downsides. You have to ensure that you don't end up insulating it and, therefore, trapping the heat in, but the concept remains valid.
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post #15 of 21
Quote:
Originally Posted by Capt Proton View Post

True enough. Using foam is seen on several videos Martin made to show the effectiveness of decoupling, so I can't say the use of foam of itself has serious downsides. You have to ensure that you don't end up insulating it and, therefore, trapping the heat in, but the concept remains valid.


Foam works but you will fry your pump from the heat. This is why I said there are serious downsides to velcro and foam.
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post #16 of 21
Quote:
Originally Posted by tsm106 View Post

Foam works but you will fry your pump from the heat. This is why I said there are serious downsides to velcro and foam.
Install pump heat-sink or use long posts/screws with spacers/bushing to pump then set it on whatever you want, as it can still breath and be decoupled. A decent example of this is the Swiftech MCP35X heat sink kits for single and dual pumps, which can then be partnered with a decoupling material -- which then can be attached via Velcro/adhesive/fasteners.
    
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post #17 of 21
Quote:
Originally Posted by Falknir View Post

Install pump heat-sink or use long posts/screws with spacers/bushing to pump then set it on whatever you want, as it can still breath and be decoupled. A decent example of this is the Swiftech MCP35X heat sink kits for single and dual pumps, which can then be partnered with a decoupling material -- which then can be attached via Velcro/adhesive/fasteners.


That's actually not a very good mount. Look at the space it takes up and it's not flexible at all. Not many builds can afford to give up that much horizontal real estate. Not even going to get into the height the mount imposes. If we're talking what we personally use, I prefer xspc's pump stand, it's a lil piece of shaped acrylic. It comes with rubber spacers, but the acrylic itself flexes and is one giant decoupler in itself.





LL
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post #18 of 21
It is a good mount and probably one of the best you will get in terms of actually decoupling and not cooking your pump at the same time. But, a physical space limitation would just mean approaching it's construction, mounting, and overall decoupling composition and thickness to meet those limitations. Not everyone is going to able to achieve the best result and will have to compromise and-or be little creative. wink.gif
    
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post #19 of 21
What pump RES did you mate to the MCP355? Was it the MCP35X RES?

The reason for asking, that type of RES tends to amplify the noise. Basically, you turned the pump into a kitchen blender. The fluid weight feeds to inlet impeller on the pump. As the impeller spins in a swirl, a vortex is made, thus the kitchen blender effect. The RES should have come with an open cell foam pad thingy. Place that in the RES. Doing so will prevent the swirl and vortex eliminating the noise.

thumb.gif
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post #20 of 21
Thread Starter 
Quote:
Originally Posted by bmaverick View Post

What pump RES did you mate to the MCP355? Was it the MCP35X RES?
The reason for asking, that type of RES tends to amplify the noise. Basically, you turned the pump into a kitchen blender. The fluid weight feeds to inlet impeller on the pump. As the impeller spins in a swirl, a vortex is made, thus the kitchen blender effect. The RES should have come with an open cell foam pad thingy. Place that in the RES. Doing so will prevent the swirl and vortex eliminating the noise.
thumb.gif

 

Damn, the res came with a plastic thing and i think thats what it was for. I threw it out :S

 

Thanks anyways!

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