otterpop510
New member
great thread, i have been thinking of modding my seios too, just tagging along..
The "Hitchhiker's Guide" to the Maxi-Stream mod
- Thread starter dhnguyen
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<a href=showthread.php?s=&postid=6820507#post6820507 target=_blank>Originally posted</a> by TA
I have two sieos 1100's and also noticed how small those inlet slots are. Do you think opening up some of those slots will increase the flow of the sieo? I'd bet they're very constrictive. (sorry for being a bit off-topic)
btw...working on a maxi-stream 1200 and 900 mod as wee speak...so I've been following for a while...great thread.
Oh definitely open up those inlet slots more. I'm thinking they (the slots) can run a bit longer lengthwise to give the SEIO impeller more water drawing power.
The more I look at this thing (SEIO) the more I think it's a very poorly designed pump. Could have been so much better IMO.
D.
shelburn61
New member
This did seem to help. It ran for 15 minutes or so before going back to sliding up and down the shaft as it spins. There is still room to get it closer to the end of the housing so I'll try again.
I am thinking it would help to to have the housing enclosed from the propeller outward when using the bigger 1.75 dumas. Maybe the smaller props aren't affected by the turbulence as much?
shelburn61
New member
<a href=showthread.php?s=&postid=6809745#post6809745 target=_blank>Originally posted</a> by jrcastro
What size prop is this?
I'm confused as to why this housing works, but mine doesn't. It does look like your prop is almost touching the crossbrace, but I don't really understand why that would compensate for having too many slots after the prop?
hahnmeister
In Memoriam
Just wondering what you guys think...
What if I used a MJ1200, but used a 1.5"- 2.0" Slip adapter to go up to 2"...then used a couple 1.8" props for water flow? Too much resistance...or might it work and make a 'mega-stream'?
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGBH0&P=7
Also, where does one get those PVC caps?
And, is someone making these? I saw some in another thread that had to have been CNC.
What if I used a MJ1200, but used a 1.5"- 2.0" Slip adapter to go up to 2"...then used a couple 1.8" props for water flow? Too much resistance...or might it work and make a 'mega-stream'?
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGBH0&P=7
Also, where does one get those PVC caps?
And, is someone making these? I saw some in another thread that had to have been CNC.
It will probably be ok with a single propeller that size. I don't think you'll have much luck spinning two of those at once. Also you will need to drill out the steel threaded inserts on those propellers. I used Traxxas once and while they put out pretty decent flow, they are a PITA to work with.
Better to use a Dumas 1.75" prop.
PVC test caps can be bought from Home Depot, Lowes, Ace, etc...
D.
That is a 1.75" Dumas propeller. It's not the slots behind the propeller that is causing your problem, it's the ones that go past it and that's why my propeller is extended out to near the cross brace. As someone mentioned previously, the larger 1.75" Dumas prop is much more susceptible to back pressure which could in turn affect how the propeller spins.
D.
Deuce67
New member
Well, I got some nitro props and modded another maxi. Got 4 pairs and ended up with 1 pair. I kept breaking them trying to drill them out. I found a post here saying to put the drill in reverse. That worked. Anyways, I compared it to my "Bionicle" prop and the Bionicle is definitely has a stronger flow. The bionicle prop ends up to be $3.50 a prop though. I will tinker with the nitro prop some more add another prop.
jobob
New member
i have a 29gal with the 400 mod. and it puts out just as much if not more than my seio 620. thats rated at i think 600gph. but since its a 1 1\2in output its not as intense as say a mj1200 with only the 1\2in output. the flow is more spread out. i ended up useing the 1.25adapter and test cap, with dummas prop. works great.
hahnmeister
In Memoriam
Any suggestions where I could order stainless steel or aluminum rods of the proper diameter? The shroud and all is easy...just carved up 1.5" and 2" PVC...but the prop is a little more detailed.
got a question for you all...hows the noise with these things. regular MJs are pretty silent, but how about with these props attached? ANy buzzing or humming?
got a question for you all...hows the noise with these things. regular MJs are pretty silent, but how about with these props attached? ANy buzzing or humming?
Do not use aluminum rods as they will corrode in saltwater. You can use stainless steel welding rods if you can find some in a welding supply shop or something. Otherwise do what I do and use the 0.098" OD carbon fiber rod which you can pick up from a hobby shop or towerhobbies.com
carbon fiber rods are easy to work with and are just as strong as stainless steel.
D.
carbon fiber rods are easy to work with and are just as strong as stainless steel.
D.
shelburn61
New member
hdyoung,
It depends on what you are keeping. I think the mj1200 with 1.75 Dumas will be perfcet along with a seio 820 in my 40 breeder (36" long)... if I can ever get mine to work consistently.
It depends on what you are keeping. I think the mj1200 with 1.75 Dumas will be perfcet along with a seio 820 in my 40 breeder (36" long)... if I can ever get mine to work consistently.
By the way guys. I noticed something today while testing out a couple mods.
The MJ900 runs MUCH smoother and quieter than MJ1200. I tested this using the same exact prop assembly (well except the MJ impeller magnet itself) and housing tested on both MJ900 and MJ1200. The MJ900 is really very quiet whereas there is a slight whirl/hum from MJ1200.
D.
The MJ900 runs MUCH smoother and quieter than MJ1200. I tested this using the same exact prop assembly (well except the MJ impeller magnet itself) and housing tested on both MJ900 and MJ1200. The MJ900 is really very quiet whereas there is a slight whirl/hum from MJ1200.
D.
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