Hydor Koralia Super-Mod
- Thread starter kroe
- Start date
<a href=showthread.php?s=&postid=9843555#post9843555 target=_blank>Originally posted</a> by gpodio
...You'll likely find that as soon as you modify a single item such as the prop, it will change current drawn, slip and volume pushed, I am not convinced that formula would remain accurate if any one of these things changed. If you could measure watts AND RPM, perhaps one could guess the flow based on prop specs. It isn't easy to measure volume pushed in a such a large cone, perhaps if you "hang" a cork from a string tied to a rock you could compare the angle the string and cork tilt to when placed in front of the pump at a certain distance. At least you'd know which prop pushes more water, the actual flow rate would still be difficult to guess though.
One of these days I'll find the time to play with these things again, I have many props to play with from the old RC boat racing days..
The K4 pumps are difficult to test for flow, but the Tunze nanostream pumps can be easily tested. It also seems to agree with your DC pump description, when I modded my Tunze 6055 pump, the flow rates (bag tested) more closely followed my 100X watts rule.
gpodio
Premium Member
I know nothing about the Tunze nanostream, do they use brushless DC motors where the impeller is directly connected to the core or do they use a magnetic coupling from the DC shaft to the impeller/propeller? If they are using brushless DC motors then they work much in the same way as AC induction motors, the biggest difference is in the controller itself which simulates the AC sinewave by switching DC current between the coils...
I think it is the latter since they share the same propeller units with their similarly rated AC pumps.
I forgot to mention while I was talking to Bruce at Hydor he also showed me a prototype of their upcoming nano K pump the size of an AAA egg, rated 3.5W and 265gph if I remember correctly.
I forgot to mention while I was talking to Bruce at Hydor he also showed me a prototype of their upcoming nano K pump the size of an AAA egg, rated 3.5W and 265gph if I remember correctly.
Horace
New member
The K4 motor will not turn an unmodded 3004. I tried it several times and i had to cut the prop down several times to get it to work. You have to cut in the neighborhood of 1/8" off the prop to get it to spin.
If there is anyone out there that has been able to get the 3004 to spin unmodded I would love to hear about it. If you do get the 3004 to spin unmodded, I would bet money you have the prop on backwards....... Medic found this out already
If there is anyone out there that has been able to get the 3004 to spin unmodded I would love to hear about it. If you do get the 3004 to spin unmodded, I would bet money you have the prop on backwards....... Medic found this out already
Did you check the other un-modded prop and K4 how much watts they were drawing? I bet more than usual. Could be Hydor sent you a K4 with larger motor in it.
They did say they will release a bigger K pump, same size of K4 but more flow, so it is possible they sent you a prototype of the bigger motor by mistake? Of course I can be way off.
They did say they will release a bigger K pump, same size of K4 but more flow, so it is possible they sent you a prototype of the bigger motor by mistake? Of course I can be way off.
ramullinax
In Memoriam
Where would you get an MJ 1200 magnet if you didn't own a MaxiJet?
<a href=showthread.php?s=&postid=9027076#post9027076 target=_blank>Originally posted</a> by kroe
It doesn't get any easier since I have MJ 1200s with octura props lying around...
If you were to do it from scratch, it would require a MJ 1200 magnet, a piece of carbon fiber tube (or rigid airline tubing), and an octura 1440 (I bet a dumas 3004 would work too). If you have ever modded a maxi-jet before you could either use your existing MJ impeller or make a new one from these parts in your sleep. The one thing left is getting it to start the right direction every time. I imagine this would just require a stopper like everyone uses for maxi-jet mods.
I am not going to find out though because I have four of these in a 92 corner... I don't need or want a single pump to put out more than 1200 gph. If I did I am sure I would have a final version of this souped up koralia running in my tank in less than 30 minutes. I just messed with this one for fun. It has already been restored to stock and put back where it belongs in my tank.
<a href=showthread.php?s=&postid=9869240#post9869240 target=_blank>Originally posted</a> by Horace
I have no idea how you got it to work, but I will have to bring over one of my impellers some time and see what the difference is. I havent even had luck getting an MJ900 to turn that prop and that is a bigger motor than the K4.
Not all MJ900 motors and magnets are exactly the same strength I have found. This depends on age of the motors/magnets as well as manufacturing inconsistencies. I have been able to get a MJ900 to spin a 3004 Dumas and another MJ900 wouldn't, go figure. If you trim the Dumas prop down just a hair this will help.
D.
ramullinax
In Memoriam
Why would I spend $18 on a new maxijet when I could spend $10 on an impeller? What does the extra $8 get me?
ramullinax
In Memoriam
Would I get the carbon fiber tube from mjmods.com as well? If not, does anyone have a link to where I could get one?
medic29
Premium Member
ramullinax
In Memoriam
Does anyone know what the outer diameter would be for the carbon fiber tube?
This is what I found when I did a search at towerhobbies.com
http://www2.towerhobbies.com/cgi-bin/WTI0095P?FVSEARCH=carbon+fiber+tube&FVPROFIL=++
This is what I found when I did a search at towerhobbies.com
http://www2.towerhobbies.com/cgi-bin/WTI0095P?FVSEARCH=carbon+fiber+tube&FVPROFIL=++
This one.
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXKAF0&P=ML
Alternatively you can use 3/16" rigid airline tubing instead. Can be picked up from the local LFS or PetSmart
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