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Best waterpump
- Thread starter situman
- Start date
Iwaki MD20RZT cannot be beat if price isnt an issue. They are around $180 unless someone knows where to get one for cheaper than that. Custom Aquatic has them.
- Joined
- Nov 30, 2002
- Location
- California
if ur luckly u can get that iwaki on ebay for less..
if thats way too expensive, the mag 3(~$50), IMO, is really good quality, good flow, amazing head (which matters the most) and no noise, but there is some vibration which isn't to hard to get rid off. may people here on the forum have invented some neat ways to get rid of it. there is also the mag 5, mag 7, ect. for more flow/head, but mag 3 has the best ratio and puts out less heat into ur water.
if thats way too expensive, the mag 3(~$50), IMO, is really good quality, good flow, amazing head (which matters the most) and no noise, but there is some vibration which isn't to hard to get rid off. may people here on the forum have invented some neat ways to get rid of it. there is also the mag 5, mag 7, ect. for more flow/head, but mag 3 has the best ratio and puts out less heat into ur water.
might have a look see
- Joined
- Nov 25, 2003
You also might want to check the noise thread about that one. The difference between most watercooling pumps is about 0.6C (That's the difference between the Mag 3 and the MCP 600, and also between the Mag 3 and the Eheim 1250 [The Mag 3 got the higher temps in both of the calculations, due to increased heat]) The MD20RZ has more heat than the Mag 3, but increased flow. I'll do the calculations in a minute.
The MD20RZ will acheive a thermal resistance of 0.17C/W with the WW, at a flow rate of 2.6GPM. However, it puts 30 watts of heat into the water, and, with a procore setup, that will acheive a water temperature of 0.3C above the Mag 3. The Mag 3 gets a thermal resistance of 0.175, with a flow rate of 2.2GPM. So, there is a thermal resistance difference of 0.005C/W, and that, multiplied by 125W, equals 0.625 degrees cooler with the MD20RZ, but, the water temperature is 0.3C warmer, so, the processor is 0.325 degrees cooler. If you want to spend $140 to get 0.325C cooler, go ahead...
Edit: This is with a WW and Procore setup.
The MD20RZ will acheive a thermal resistance of 0.17C/W with the WW, at a flow rate of 2.6GPM. However, it puts 30 watts of heat into the water, and, with a procore setup, that will acheive a water temperature of 0.3C above the Mag 3. The Mag 3 gets a thermal resistance of 0.175, with a flow rate of 2.2GPM. So, there is a thermal resistance difference of 0.005C/W, and that, multiplied by 125W, equals 0.625 degrees cooler with the MD20RZ, but, the water temperature is 0.3C warmer, so, the processor is 0.325 degrees cooler. If you want to spend $140 to get 0.325C cooler, go ahead...
Edit: This is with a WW and Procore setup.
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- Joined
- Dec 20, 2003
- Location
- London, England
AngryAlpaca said:
out of curiosity where are you sourcing the flow resistance figures for these calculations?
just for interest run the same ones with an RBX (less flow resistant and more responsive to higher flow...)
- Joined
- Nov 25, 2003
http://www.ocforums.com/showthread.php?s=&threadid=263209&highlight=cathar+pump+comparison I use this, and BillA's WW testing for the C/W. I assume a radiator thermal resistance of 0.03, which would happen with a Procore with a high powered fan. An RBX has around 2" less resistance, so I doubt that would make much of a difference. With the way I use the graphs, I wouldn't be able to make out a difference between 16.3" and 18" drop. BillA didn't do a curve on the RBX, and pHaestus', while still accurate, isn't comparable. I suppose I could do them both using pHaestus', but he doesn't assign a C/W rating. I supposed I could look that up his wattage, though, and then figure it out.
Bah. There is no wattage figure. It can't be used for calculations, just comparison.
Bah. There is no wattage figure. It can't be used for calculations, just comparison.
- Joined
- Dec 20, 2003
- Location
- London, England
AngryAlpaca said:
i thought the flows seemed a bit high...those are of a whitewater alone - no tubing/rad etc...
- Joined
- Nov 25, 2003
Oh crap you're right. I thought he used a typical setup in that comparison. Damnit. Back to looking up stuff, then.
- Joined
- Dec 27, 2003
- Location
- Fort Wayne , In
I was gonna say that sounds a little weird
- Joined
- Nov 25, 2003
Using Excel, with a WW (18") a Procore (3") and tubing with turns and such (10", rather arbitrary) the Mag 3 gets 7LPM, and the MD20RZ gets 9.2LPM. That's 1.4 lower for the Mag 3, and 0.7 lower for the MD20RZ. I like Excel. Now, switching my waterblock value to 16.3" for the RBX, we get 7.3LPM (1.9GPM) and 9.25LPM (2.4). Not a big difference.
My pump figures aren't too great. I was using Cathar's graph. What number do you think I should use for my random other restrictions? I think 10 might be too high.
My pump figures aren't too great. I was using Cathar's graph. What number do you think I should use for my random other restrictions? I think 10 might be too high.
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- Joined
- Dec 20, 2003
- Location
- London, England
can get tubing resistance from here......AngryAlpaca said:
http://www.ocforums.com/showthread.php?s=&threadid=266553
- Joined
- Nov 25, 2003
Straight tubing. It's rather irrelevant. But, it does highlight the huge difference between 3/8" and 1/2". Screw this 1/2" wuss stuff, I'm switching to 1" next week.
I really enjoy my mcp600. It is really quiet and stable. It gives out very little heat or noise such as rattling. It is rated for 160gph which is average and 10.5 feet of head which is great. This pump is best used in a system with multiple blocks or when using a really flow restricted block such as a danger den rbx or whitewater.
Keep clocking
Keep clocking
- Joined
- Dec 20, 2003
- Location
- London, England
