FITS: 2010 MegaRig

[Fitseries3]

Hey fit I've just been on a google spree.

Seems pump placement really doesn't make much of a difference.

If it did.


My household water supplies wouldn't work, my pumps are in the actic, and so are the reservoir heh.

Its on a bigger scale but if it works in houses it will work on a small scale too.

all of my searching for pc based water cooling was only people saying, yet it seems no one bothers to even try.


It could be one of these myths that stem from nowhere.



Elaboration!

After all its not as if the water will just stop is it?

Its got a constant pressure behind it!

no... it doesnt. the res is a break in pressure. there is almost no pressure pushing water into the pump. the pump relies entirely on gravity to push water into it.

 

[pantherx12]

Pumps draw in water /air also.

You have a vacuum in the pipes it should still get to the pump, once it does then it will be drawing water and thus work.

Have you ever tried fitting a pump higher?

The combination of water being pushed and a vacuum will make it work.

In theory at least.

Why not make a mock loop outside the rig now and see?

 

[erocker]

the pump relies entirely on gravity to push water into it.

It shouldn't. Is there something wrong with the pump? You should be able to put the pump at the top of the loop and it should have more than enough power to move water. Maybe a bigger pump?

 

[Fitseries3]

this pump is 2x a D5(mcp655)

there is not enough room at the top of the case for the pump. i just tried.

 

[pantherx12]

Perhaps a multiple pump set up would be easier?

2 smaller ones .

 

[erocker]

this pump is 2x a D5(mcp655)

there is not enough room at the top of the case for the pump. i just tried.

Crap! I was just looking back in the thread and saw how big your loop is and was about to recommend adding a 2nd pump.

Just some ideas I guess would be having the pumps at opposite ends of the loop (if that makes sense), or possibly going with two loops?

 

[pantherx12]

I'll send Velvet wafer this way later.

He is very good with water cooling.

( should see his set up, even puts this to shame in terms of radiator surface area)

 

[Fitseries3]

geeez...

nah... the pump i have is more than powerful enough for this loop.

its a 24v DC pump with 26ft of head and it does 240gph

 

[pantherx12]

I was only thinking two pumps in terms of, it will be much easier to mount them ha ha.

 

[Whilhelm]

No I would say for sure that the RD30 is the pump you need for this build. Two 655s at full tilt will not provide the same head pressure as the RD30. Considering the size and amount of radiators you have and knowing that the black ice series of rads are fairly restrictive then this pump is ideal. Having the pump at the bottom of the loop is better because it increases the head pressure at the pump outlet due to the weight of the water in the reservoir above it. Yes the pump can go at the top but it is not ideal because it makes bleeding the loop very difficult. And if a big enough air bubble gets in the pump it will stall it.

As for pump position, perhaps mounting it with the inlet facing upwards mounted off the back of the motherboard tray. That way the res could be positioned above it, but then I suppose at really high settings the reservoir will cyclone really bad.

I dunno I think you need a bigger case haha. Even though this one is gigantic you still seem to be running out of room.

 

[Fitseries3]

No I would say for sure that the RD30 is the pump you need for this build. Two 655s at full tilt will not provide the same head pressure as the RD30. Considering the size and amount of radiators you have and knowing that the black ice series of rads are fairly restrictive then this pump is ideal. Having the pump at the bottom of the loop is better because it increases the head pressure at the pump outlet due to the weight of the water in the reservoir above it. Yes the pump can go at the top but it is not ideal because it makes bleeding the loop very difficult. And if a big enough air bubble gets in the pump it will stall it.

As for pump position, perhaps mounting it with the inlet facing upwards mounted off the back of the motherboard tray. That way the res could be positioned above it, but then I suppose at really high settings the reservoir will cyclone really bad.

I dunno I think you need a bigger case haha. Even though this one is gigantic you still seem to be running out of room.

the pump i have is a hair slower than an RD30.

 

[Whilhelm]

Oh, it is an RD30 though? I was just going by your parts list on the first page.

 

[Fitseries3]

i will have the RD30 back soon yes.

 

[pantherx12]

No I would say for sure that the RD30 is the pump you need for this build. Two 655s at full tilt will not provide the same head pressure as the RD30. Considering the size and amount of radiators you have and knowing that the black ice series of rads are fairly restrictive then this pump is ideal. Having the pump at the bottom of the loop is better because it increases the head pressure at the pump outlet due to the weight of the water in the reservoir above it. Yes the pump can go at the top but it is not ideal because it makes bleeding the loop very difficult. And if a big enough air bubble gets in the pump it will stall it.

As for pump position, perhaps mounting it with the inlet facing upwards mounted off the back of the motherboard tray. That way the res could be positioned above it, but then I suppose at really high settings the reservoir will cyclone really bad.

I dunno I think you need a bigger case haha. Even though this one is gigantic you still seem to be running out of room.

It does not increase pressure at the outlet, it can only let through so much water due to the mechanic parts getting in the way.

It won't make a difference where you place the pump, once you've fully flooded the system you also no longer need to worry about air bubbles.


: ]

To see this for yourself.

Get a pump, a a pipe and a res, switch on pump and watch it spray into the bath.

change the position of the res, watch the it make shit all difference to how far the water sprays.




*edit* did no one else piss about with their loop before they installed it? XD

 

[Whilhelm]

That is not a very accurate way of measuring pump flow rates. I was just going by what I learned in fluid dynamics. From everything I have learned it is always ideal to have the pump below the reservoir.

 

[pantherx12]

Fluid dynamics is very complex though, to many variables.

Practical testing is always better! : ]

 

[Whilhelm]

I am not going to hijack fits thread with a fluid dynamics discussion.

Yes practical testing is better but only if you have an accurate means of measuring the results.

 

[pantherx12]

I am not going to hijack fits thread with a fluid dynamics discussion.

Yes practical testing is better but only if you have an accurate means of measuring the results.

Of course, but it was the only accessible way I could suggest of seeing that it doesn't make much difference.


Another way that could be done quite easily done would be to install the loop externally and see if pump/res position makes a difference in temperatures, if it doesn't then there is no need to worry regardless

 

[Fitseries3]

ok...

after much thought i figured it out.

pics in a min

 

[Fitseries3]

its not kinked...

 

[pantherx12]

Nicely done fit, nicely done .

 

[Fitseries3]

yeah i gave the tubing hell...

stretched good ol 7/16" tube over 3/4" barbs on the pump.

only problem is i'll have to move the res once i get the new mobo as the new mobo will go all the way out to about half way through the rad.

 

[t_ski]

What about putting a BP 45 on the rad?

 

[Fitseries3]

was thinking about it.

i need a few 45's for the 2 front rads it seems.

i'll sell you that block now PM me.

 

[t_ski]

I have a couple 45's, but they leaked. If you know how to fix them, I'll give you a deal on them.