Tunze nano mod

I didnt take any pics, but I pulled out the dremmel and cut off the tube as pink described. Absolutely huge difference. Thanks.

I had the 2 streams in my 65 w/ another mj900 cause I wasn't getting as much flow and surface agitation as i wanted...Yeah I had to pull the mj out after this. I have a mixed reef and the extra mj was too much flow. I had to play around w/ the streams just to get them right. 1100 gph definitely feels about right. That is if what it was before was around 700.

I am now very happy I did this.

Also my pump would almost always, even before the mod, start the wrong direction. The correct themselves in under 2 seconds, but placing your hand in front of them helps. Still love the pumps regardless.
 
Wow i just did the mod and i am impressed. I see another thing i may try. I am thinking about slotting the underside to allow more water movement. With the shroud off i ran the motor and it had even more flow. I obviously will not run it uncovered however, I wonder if it is worthwhile to try and make a new shroud for the nanostream. I would make it so that there is less flow restrictions.
 
<a href=showthread.php?s=&postid=9293951#post9293951 target=_blank>Originally posted</a> by jdoenumber2
Wow i just did the mod and i am impressed. I see another thing i may try. I am thinking about slotting the underside to allow more water movement. With the shroud off i ran the motor and it had even more flow. I obviously will not run it uncovered however, I wonder if it is worthwhile to try and make a new shroud for the nanostream. I would make it so that there is less flow restrictions.
Click to expand...

And cut back the front nozzle as close to the sphere as possible then glue the screened cap on, that should make for a much wider flow pattern.
 
I just did the cutback of the front nozzle, the flow has increased by the feel of my hand but I did not try to quantify, I will not be surprised if the flow is above 1200gph. The true benefit of this mod is a wider flow pattern. The fish screen is very tight no way the prop can get out, but I had to be very careful to put the screen on. The plastics on the pump are not heavy duty.

The downside of this mod is the pump can not self correct anymore because the prop could not shoot out all the way, it would be blocked by the fish screen, but since I never relied on self-correct so no big deal.
 
Here is a photo of my modification. I cut the "tunnel" back to the housing on the outlet piece of the Nano using a Dremel tool.

tunze%20nano%20mod%20003.JPG
 
Come to think of, if we manage to cut the front back even more the flow may increase more. I noticed when the shroud was taken off the flow was much larger than even after the mod.

The appearance did not change much:

16865TunzeNanoMod3.jpg
 
joeychitwood, you can post the picture directly in your post like we do, just use the tool. Oops, guess you did.

With a dremel you should be able to buff out the rough edges at the cut to help the flow.
 
yea, whe nthe shroud is off there is an amazing ammount of flow

this is most likely becasue there is no resistance at all

think of it this way, it still has to be forced out through a tunnel, even if both the inside and outside tubes are cut off. Im still tryign to design a way to make no resistance, yet keep the front covered

i haev a few ideas and will post once i have something i like, after i get that done and get a few responses, some critisism on hwo to improve it then ill buy another shroud off tunze and make it work
 
mr pink floyd


A really easy mod to increase the flow is to cut every other slot off on the shroud, essentially allowing for more inlet area hence increasing the flow. I saw the nano stream in person the other day and felt that the shroud is way too restrictive.


D.
 
yea, that is true dh.

so far the idea i have is cutting a hole in the front, the whole tube off, then using something like eggcrate to cover the hole.

im not sure exactly how to go about doing this, but ill keep thinking. If you have any ideas, feel free to post
 
Why would you need to cover the hole back up with eggcrate or anything? Is it to keep your fish out? While the pump is on, I doubt any fish will be strong enough or stupid enough to try to swim into the shroud.

Now I can see where this could be a problem when the pump is off. But then if you have any smaller fish that can fit through the eggcrate this could still be a problem potentially.
 
<a href=showthread.php?s=&postid=9343478#post9343478 target=_blank>Originally posted</a> by mr pink floyd
i was thinking to cover it so if the prop spun backwards, it wouldnt shoot out of the pump housing
Click to expand...

I have tried many times unsuccessfully to get the prop to shoot out. It always got pulled back before completely separated from the housing. That said the possibility is there. But even that can be resolved, all you need to do is switch it on and off quickly until it spins correctly, not allowing the prop the chance to shoot out too much.

My main concern of further mod is aesthetic than anything else. If we cut the shroud too much to expose the prop it wouldn't look good.
 
<a href=showthread.php?s=&postid=9343465#post9343465 target=_blank>Originally posted</a> by dhnguyen
Why would you need to cover the hole back up with eggcrate or anything? Is it to keep your fish out? While the pump is on, I doubt any fish will be strong enough or stupid enough to try to swim into the shroud.

Now I can see where this could be a problem when the pump is off. But then if you have any smaller fish that can fit through the eggcrate this could still be a problem potentially.
Click to expand...

No, but I'll bet that my sea-hare is that stupid. ;)
 
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