impur Posted April 16, 2006 Share Posted April 16, 2006 Ok so i've been following the maxijet mod over at RC and decided to take a crack at it. The idea is to take a maxijet and turn it into a Seio/Tunze type stream. I have a couple MJ1200 but from what i read they will be to much flow for my 55 i'm setting up. So...i'll be picking up a few MJ600-900 pumps from Sean for that. But for now, i have a crappy old Regent powerhead i thought i'd give it a try on. It actually works, how much flow, well its much more than the PH was. I still need to finish the shroud that covers the propeller. Well here is how I faired: Walmart special Impeller taken apart. This powerhead uses a floating magnet. Meaning it is not fixed to the stainless (and beginning to rust) shaft. The shaft stays put, the magnet and impeller spin around it. Quote Link to comment Share on other sites More sharing options...
impur Posted April 16, 2006 Author Share Posted April 16, 2006 So i headed over to Eugene Toy and Hobby. Lack of inventory, so i made do with what was available and picked up an assortment of RC boat props. I also found these awesome wheels that will work great for securing the end of the shaft. Dumas boat prop try #1 Impeller put back together DIY style Attempt #1 in water. It works great, moves decent amount of water. I used a scrap piece of 1.5" ABS as a shroud/nozzle and the flow really increased. It must direct it much better. Quote Link to comment Share on other sites More sharing options...
impur Posted April 16, 2006 Author Share Posted April 16, 2006 One thing i noticed. There is no set direction for the prop to spin on this pump. Half the time it spins backward, the other half the proper way. If it spins backward, i have to make it stop and spin the other way with my fingers. A stop is going to need to be put in place to prevent the reverse spinning in the event of a power outage. Anyway, on to the shroud. Scrap piece of 1.5" ABS fits almost perfect over the hole on the power head. So i used the dremel and made sure it would fit. Might as well use the parts available. This will be how i connect the shroud to the pump Quote Link to comment Share on other sites More sharing options...
impur Posted April 16, 2006 Author Share Posted April 16, 2006 Just need to get the flange off this intake Perfect fit Some grinding and some superglue Quote Link to comment Share on other sites More sharing options...
impur Posted April 16, 2006 Author Share Posted April 16, 2006 I'm gonna let the superglue dry for tonight. Tomorrow i hope i'll get a chance to drill a bunch of holes in the shroud for the intake of water. Then we'll see what this puppy can do. Miles Quote Link to comment Share on other sites More sharing options...
Guest Ahbrit Posted April 16, 2006 Share Posted April 16, 2006 Now that's DIY!!!! i got a question though.....Why don't the manufacturers of these pumps do the same modifications and up their prices? (99% of people wouldn't know the simplicity of the change) Quote Link to comment Share on other sites More sharing options...
impur Posted April 16, 2006 Author Share Posted April 16, 2006 Good question. I think its the reason that TAAM came out with the Seios. I've got the prop cover glued up. I just need to drill it for the intake of water. I'll be doing that and posting the conclusion tonight. Quote Link to comment Share on other sites More sharing options...
Michael7979 Posted April 17, 2006 Share Posted April 17, 2006 I'll be waiting to see how that turns out!! Might be a future project........ Quote Link to comment Share on other sites More sharing options...
impur Posted April 17, 2006 Author Share Posted April 17, 2006 Ok got the cover done. Quote Link to comment Share on other sites More sharing options...
impur Posted April 17, 2006 Author Share Posted April 17, 2006 It doesn't work as well with the cover on. I think the prop needs to be farther out from the body of the pump. This should allow much more water to be taken in. I'm going to try making just a sort of basket to cover the prop. It moves a good amount of water for this tiny thing without the cover. I need to figure out some sort of stopper that the prop will hit if it starts spinning the wrong way. When it start the wrong way it almost pulls out of the pump. Then when i let it hit my finger it goes the right way. I want to get the MJs from Sean for a little more reliable pump. This thing only runs half the time anyway. Quote Link to comment Share on other sites More sharing options...
R-3 Posted April 17, 2006 Share Posted April 17, 2006 Looks good Miles! Sweet Job. How much flow do you think your getting out of them? Later Ryan Quote Link to comment Share on other sites More sharing options...
rmhuntley Posted April 17, 2006 Share Posted April 17, 2006 the prop should also be as close in size to the inner Diameter of the shroud as you can get.... the less gap between the prop tips and the shroud wall, the more water you will move. Quote Link to comment Share on other sites More sharing options...
Michael7979 Posted April 17, 2006 Share Posted April 17, 2006 I think if you had a longer prop shaft you would be OK. From the picture it looks like propeller dosen't stick out any farther than normal. Can you get a longer shaft at the Toy Shop? That should help. Quote Link to comment Share on other sites More sharing options...
impur Posted April 17, 2006 Author Share Posted April 17, 2006 I'm going to order some .98" carbon fiber shafts today to extend it a bit. I'm also gonna work on finding a different cover, as this is the only prop i bought that fits inside this shroud. I think the other props are gonna move some serious water. Quote Link to comment Share on other sites More sharing options...
impur Posted April 17, 2006 Author Share Posted April 17, 2006 Looks good Miles! Sweet Job. How much flow do you think your getting out of them? Later Ryan With the shroud it doesn't do much. When removed its moving a much wider stream of water so its hard to say. I'd guesstimate about double the gph just using that small prop. This powerhead was rated at 150gph i believe. Quote Link to comment Share on other sites More sharing options...
impur Posted April 17, 2006 Author Share Posted April 17, 2006 Ok got some stuff ordered, 48" of carbon fiber rod, and 4 more props just in case i mess up on a couple. Carbon Fiber Rod, 24", .098 (2) [MID5707] Plastic Prop,1/8":.19-.35 [DUM3003] Plastic Prop,3/16":.19-.35 [DUM3004] I'll be picking up a couple pumps from Sean this week too. So i'll have 2 or so days till these arrive. Then its back to work! Quote Link to comment Share on other sites More sharing options...
R-3 Posted April 18, 2006 Share Posted April 18, 2006 Keep up the good work Miles, keep us posted. Later Ryan Quote Link to comment Share on other sites More sharing options...
parvo99 Posted April 18, 2006 Share Posted April 18, 2006 I've done the maxijet mod. It works awesome. If you've been following the thread on RC, using 1.5 inch schedule80 works perfectly for the maxijets. I bought some and have like 20 extra shrouds. These are very nicely made, and fit perfectly on the maxijets. If you're interested in buying them, or trading them, pm me. THanks. Quote Link to comment Share on other sites More sharing options...
impur Posted April 18, 2006 Author Share Posted April 18, 2006 Nice! I didn't have any of the 1.5 PVC laying around so I went with the ABS and a smaller prop. Well heck its not even a maxijet!! LOL DId you use the test cap or just cut the groove to mount to the MJ yourself? Did you use a miter saw for that? I'm going to have to use my dremel. Can you show me a pic of your impeller/propeller on yours? Quote Link to comment Share on other sites More sharing options...
parvo99 Posted April 19, 2006 Share Posted April 19, 2006 My great uncle is a machinist and he has a lathe. So, he cut the groove. The 1.5 inch pvc actually is too big on the outside, and too small on the inside. My great uncle actually trimmed the outside, and inside slightly so it fits perfectly. Then I made the slots on a table saw. There's also a notch at the top for the 1/4 inch acrylic end mount. I used a 1435 octura prop. I'll try to get pictures tonight. Quote Link to comment Share on other sites More sharing options...
impur Posted April 19, 2006 Author Share Posted April 19, 2006 Ahh lucky you! I think i'll go the easy route and use a test cap. I'll make a few shrouds, some with holes some with slots like yours. I have 4 more props coming, all Dumas. I do have a couple of the octura props too, i guess those are the ones that put out the major flow. Which prop gave you the most flow and easiest restarting? Quote Link to comment Share on other sites More sharing options...
impur Posted April 27, 2006 Author Share Posted April 27, 2006 Got home last night to find a package on my doorstep. Luckily it wasn't corals, stupid UPS delivery. Goodies!!! 4 props and 48" of carbon fiber rods! I'll be doing some more work tonight!! Still need to pickup the maxijets from Sean. Quote Link to comment Share on other sites More sharing options...
impur Posted April 27, 2006 Author Share Posted April 27, 2006 Sweet!! Got a miter saw. Now i can make some sweet looking shrouds. Quote Link to comment Share on other sites More sharing options...
R-3 Posted April 28, 2006 Share Posted April 28, 2006 Did you guys see this thread. Really nice job. Magnets are a sweet addition. http://www.reeffrontiers.com/forums/showthread.php?t=14607 Later Ryan Quote Link to comment Share on other sites More sharing options...
impur Posted April 28, 2006 Author Share Posted April 28, 2006 Yah i checked that one out before. Real nice work by that guy. Quote Link to comment Share on other sites More sharing options...
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