The "Hitchhiker's Guide" to the Maxi-Stream mod

[dhnguyen]

Where's your cross brace to hold the impeller centered and the stopper prevent the reverse spinning?

D.

 

[crypto]

all the mods are great, but....

how about some mounting diy mods for these things?

the flow is so strong that the maxijet wants to take off.
i hate using suction cups because they get stiff after time.

 

[brandon0350]

im in the process of setting up a 60 sps bb cube. i was looking for i deas on flow. i was thining the seio 2600s and getting two. but then i decided i want them to be on a timer and seios cant go on a timer and i cant afford the controllable tunze. then i found this mod
now to my questions.
1. how much flow does the 1200 put out ? and ideas?
2. has anyone had these on a wavetimer over a long period of time?
3. has anyone compared the flow to a tunze or seio? is it comparable?

thanks brandon

 

[dhnguyen]

<a href=showthread.php?s=&postid=6777467#post6777467 target=_blank>Originally posted</a> by crypto
all the mods are great, but....

how about some mounting diy mods for these things?

the flow is so strong that the maxijet wants to take off.
i hate using suction cups because they get stiff after time.

You have several options here.

1. Glue the existing MJ suction cup bracket onto the MJ. You can renew your old suction cup by boiling them in hot water for about 15 minutes or so.
2. Glue the existing MJ hanger onto the MJ
3. Glue a magnet cleaner onto the MJ
4. Buy an after market hanger for it or make one yourself (should be fairly easy to do) Here's a good tip
http://www.advancedaquarist.com/issues/may2002/tips.htm or check out nick's reef for the acrylic hangers.
http://www.nicksacrylicreef.com

D.

 

[newty]

<a href=showthread.php?s=&postid=6777542#post6777542 target=_blank>Originally posted</a> by brandon0350
im in the process of setting up a 60 sps bb cube. i was looking for i deas on flow. i was thining the seio 2600s and getting two. but then i decided i want them to be on a timer and seios cant go on a timer and i cant afford the controllable tunze. then i found this mod
now to my questions.


1. how much flow does the 1200 put out ? and ideas?

Estimates vary, especially with the number and types of propellers. Lets say aroung 1800 gph.

2. has anyone had these on a wavetimer over a long period of time?

Some people have them on wavetimers. I believe someone said they had theirs on for about half a year. It is more dependent on the maxijets motor units wearing out over time rather than the modifications. Of course, the pieces used for the mod can wear eventually, but it is cheap to do...


3. has anyone compared the flow to a tunze or seio? is it comparable?

People have hand-tested the flow and report it being just about the same flow as these units, depending on the models. It may be safe to estimate that they are relatively comparable in terms of flow.



thanks brandon

 

[dhnguyen]

<a href=showthread.php?s=&postid=6777542#post6777542 target=_blank>Originally posted</a> by brandon0350
im in the process of setting up a 60 sps bb cube. i was looking for i deas on flow. i was thining the seio 2600s and getting two. but then i decided i want them to be on a timer and seios cant go on a timer and i cant afford the controllable tunze. then i found this mod
now to my questions.
1. how much flow does the 1200 put out ? and ideas?
2. has anyone had these on a wavetimer over a long period of time?
3. has anyone compared the flow to a tunze or seio? is it comparable?

thanks brandon

1. One MJ900 with double 1.25" nitro propeller will generate approx. 1800gph. I'm sure the MJ1200 will be similar of not better. One MJ1200 with single 1.75" Dumas propeller will generate a tremendous amount of flow. I haven't tested the 1.75" mod but it feels easily double the flow of the double nitro mod.

2. I'll let others chime in on this as I don't run mine on a wave timer.

3. More than a SEIO 820, 1100, or even 1500. I don't have a Tunze to compare against.

 

[brandon0350]

when you say half a year does it mean they failed in 6 months or 6 months and still going?

 

[brandon0350]

so do you think a 1200 with a dumas 1.75" prop will put out as much as a seio 2600? thats what im looking for.

 

[newty]

<a href=showthread.php?s=&postid=6777654#post6777654 target=_blank>Originally posted</a> by brandon0350
when you say half a year does it mean they failed in 6 months or 6 months and still going?

Still going...

 

[Isayso]

<a href=showthread.php?s=&postid=6777258#post6777258 target=_blank>Originally posted</a> by dhnguyen
Where's your cross brace to hold the impeller centered and the stopper prevent the reverse spinning?

D.

Hi
the pics were taken before that I installed the stopper..
when the propeller stops it doesnt go right away to the other side..
and when it does ot doesnt put too much flow..

 

[newty]

<a href=showthread.php?s=&postid=6764737#post6764737 target=_blank>Originally posted</a> by crypto
the .098 fits in the 0.157 quite well. make sure the end of the .098 is clean (no burrs or bits hanging off). once it is in the tube, the graphite of the tube and rod make it spin quite well.

i had to drill the props out (from 0.125 to .157) but that was only about 3 or 4 drill sizes, then a little steel wool on the tube. I found a fairly easy way to drill the prop.

1. use the smallest drill size first on the prop, this is pretty easy.
2. then drill with the same bit into a piece of wood (all the way through is best).
3. take the drill bit, push it into the block of wood so that only a few mm's stick out.
4. put the prop on this, to keep it aligned with the drill press.

now step up in drill bit sizes but just dont drill all the way through. the first bit will keep the prop aligned. once you get to the final size and drill partways through, you can remove the small drill bit that was aligning the prop.

all of this was done on a drill press, with the block of wood clamped down, so the center never moved.

(note, you could try sanding the tube down to 0.125. an easy way is to put the tube in the drill and then use sandpaper or a file. but becareful because the chuck will squish the tube easily.)

Do you have the cat no. for the larger carbon rod? I did a brief search on Towerhobby and didnt find a hollos carbon fibre rod. Perhaps I am missing something here?

Newty

 

[dhnguyen]

<a href=showthread.php?s=&postid=6777672#post6777672 target=_blank>Originally posted</a> by brandon0350
so do you think a 1200 with a dumas 1.75" prop will put out as much as a seio 2600? thats what im looking for.

I haven't seen the SEIO 2600 in action in person nor tested it against the Maxi-mod a la 1.75"

But if the 2600 is indicative of the gph of the SEIO, then I think you stand a very good chance the the Maxi-mod 1.75" Dumas will be on par if not better.

From what I have seen though the SEIO 2600 is a HUGE beast and could be quite unsightly in a tank.


D.

 

[brandon0350]

cool thanks for all the help guys. is there one place on line where i can order the 1.75 dumas props and the cf rod together and save on shipping?

 

[brandon0350]

ya they are pretty big for a 24" cube thats why im looking into the maxi mod. by the way. thanks for your help and posting all this info

 

[dhnguyen]

<a href=showthread.php?s=&postid=6777715#post6777715 target=_blank>Originally posted</a> by brandon0350
cool thanks for all the help guys. is there one place on line where i can order the 1.75 dumas props and the cf rod together and save on shipping?

almost everything besides the PVC parts can be ordered from http://towerhobbies.com

 

[dhnguyen]

<a href=showthread.php?s=&postid=6777684#post6777684 target=_blank>Originally posted</a> by Isayso
Hi
the pics were taken before that I installed the stopper..
when the propeller stops it doesnt go right away to the other side..
and when it does ot doesnt put too much flow..

Make the inlet holes bigger.

D.

 

[brandon0350]

do i use 1/8 or 3/16 shaft size?

 

[crypto]

0.157 tube from towerhobby:
LXJDP8 Midwest Carbon Fiber Tube .157 24"
make sure to search "tube" not "rod"

note: i find that putting the .098 rod in the drill press and lightly sanding helps make it turn a lot smoother in the .157 tubes.



Those acrylic hangers on Nick's site look nice, i'll have to try making one of those.

 

[dhnguyen]

<a href=showthread.php?s=&postid=6777747#post6777747 target=_blank>Originally posted</a> by brandon0350
do i use 1/8 or 3/16 shaft size?

I assume you're referring to the 1.75" Dumas prop. Use the 3/16" ones because that would fit perfectly over a 3/16" rigid airline tube.

Keep in mind though, if you're doing the 1.75" Dumas prop mod then you're going to have to be a little more creative with the housing. The 1.75" prop won't fit inside a 1.5" PVC pipe and the 2" PVC pipe or 1.5 slip coupling will be too big for the MJ alone.



D.

 

[Horace]

Well I just finished the mod, I will say it does give quite a bit of flow. I started with the dual nitro and it made quite a bit of noise/vibration. Perhaps one of my props was a bit off ballance, Im really not sure. As soon as I dropped it to one prop it made it damn near silent. The one prop also seems to produce plenty of flow anyway so I think I am just going to stick with one for now. Anyway, thx for all the info guys. Great DIY!

On a side note, Im not sure how much it was worth it after all the work I put into it. Your probably better off just buying a Seio and being done with it. You can do the Tunze type mounting mod and make them look pretty decent as well.