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#976
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ball, can i get a pic or two of the prop assm.
Tim |
#977
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Ball, what size is the "Octura 1440" these pumps are so much stronger than mj it seems that they should be able to triple 3000gph. your housing look great nice and compact. did you try the prop a little futher out away from the pump? could your prop be to close to the housing may not be getting enough water coming in from behind the prop.
can you they us more about this "I had to dremel just a little bit off the bottom of the prop in order to make the pump start up 100% of the time on its own."
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Roland Last edited by Roland Jacques; 04/12/2006 at 11:21 PM. |
#978
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Can you get more pictures of the actual impeller and magnet without the housing on? or removed from the case?
will |
#979
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Inexpensive Maxi-Jet Sale till 6/30/06
I have a Dr.Foster & Smith Sale Catalog which has the Maxi-Jets Discounted a little more from what they have them advertised on their website.
goto- http://www.drsfostersmith.com Search for these item numbers (item #'s only)- UG-517501 MJ400 $11.39 UG-517514 MJ600 $11.99 UG-517527 MJ900 $14.99 UG-517540 MJ1200 $16.99 to get it to show the cheaper pricing. You must do a search for those "UG-######" item numbers to bring up those cheaper prices. If you go directly to the Max-Jet pumps from their home page, will have them at a higher price w/ CD-###### item numbers. Note: You can swap the UG- "letters" with the current websites CD- item numbers with a lot of products throughout their website to save on other items too. Like Instant Ocean & Reef Crystals 160gal buckets of salt UG-16881 $33.99 & UG-16882 $37.79 (no-extra shipping charges either). Brent Last edited by Brent Thomann; 04/13/2006 at 01:06 AM. |
#980
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Thanks for the heads up on the MJ prices.
Note: That the item # for the MJ900 is UG-517527
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Malama 'aina |
#981
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Quote:
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#982
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I am guessing and this is just a guess. but most likely 3600 rpm syncrhonous speed (rpm) = current X Frequency / number of poles in the motor Srpm = 120 x F / P Srpm = 120 X 60hz / 2 = 3600 Of course there is also slippage so that number would most likely be a bit lower as well. D. |
#983
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Ball- That is sweet what you did with the housing. Almost a clone of the Tunze shroud. What did you use to cut the slots? D. |
#984
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That shroud is sweet. Looks very pro. I have made a shroud/housing for the Hi-Spec Aquaclears, tested it on the AC 10/1000 (the mini one), and the results are great. I am awaiting my Hi-Spec 4000 and 3000s, and also have a couple 802s on the way, and plenty of octuras waiting to be put to use... Should be cool...
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"If at first, the idea is not absurd, then there is no hope for it" -Al Einstein |
#985
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Quote:
Tyler |
#986
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I've got an aquaclear 301 (174 GPH) kicking around. I took off the impeller housing and I notice that it chatters around quite a bit while running under water. I presume that once the prop is on there that the force of it pushing the water will hold the magnet into the pump and prevent the chattering.
I'll have to order some props from that CDN distributor to try the mod out on this particular pump. If it works out well I'll pick up a 402 or 802 and try with those. Tyler |
#987
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ball thats awesome.. arnt the 802s an awesome pump...
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#988
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Quote:
Quote:
I glued the prop to a 3/16" rigid airline tube. Then, glued the tube into part of a air valve that came with a maxijet pump (black part in pic). I trimed that down and glued that to the impellor shaft. I them used a dremel to sand it all down to a low profile. Quote:
I didnt find the 802 that strong. I did get it to spin a 1.75" Octura and the flow was crazy. Propbably pushing 4000 GPH. However, it wont start it up on its own. It had a hard time starting the 1.5" on its own becasue the pitch on these props are so much. To get it to start up 100% of the time, I had to trim the prop. The ouline in red is where the prop used to be. Quote:
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#989
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The Octura props are numbered as follows:
The first two digits are the pitch in inches The last two digits are the diameter in millimeters So the 1440 has 1.4" pitch and a diameter of 40 mm which is 1.575".
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Holding it down on the engineering tip y'all |
#990
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My voltage suply is 220/240volts @ 50hz Would be nice to see how they compare & thats some nice work there Ball
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If theres a bright spark to the center of the universe, were on the planet it's farthest from - Environmentally speaking,DO SOMETHING NOW, not tomorrow! |
#991
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i found the start up power on these AC 402 to be very week also but once runing its hard to stop. not sure but it seems that the mjs have more start up power. im going to play with the 802 today i was hoping to turn a 2 " prop with the 802.
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Roland |
#992
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I think an 802 can start up a bigger prop, as long as the prop doesnt have a big pitch.
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#993
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Quote:
__________________
If theres a bright spark to the center of the universe, were on the planet it's farthest from - Environmentally speaking,DO SOMETHING NOW, not tomorrow! |
#994
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RE: Ball's Shroud
Is there a limit to how short the shroud can be? (As long as it covers the prop ) I have the lutz mods - I've become disenchanted with their performance and size. |
#995
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When I had the housing only a 1/2" longer, the flow coming out of it was not even. It was still as strong, but a little to erratic. With the housing shorter, the flow was less disturbed and more wide.
Since these props put out wide flow, if you have to much of a "tunnel" for the flow to go through, the wide flow will bounce all around that path until the flow exits. When the flow finally exits, it wont be as wide and "smooth". If you take a naked prop with no housing and run it in water, you can feel the true power of the prop and the true spread of flow. I wanted to mimic that same feel with a housing on. |
#996
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Thanks Ball - great post.
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#997
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Nice job Ball! I've got an 802. Here we go again.....
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#998
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#999
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The shorter the wider and more dispursed the flow, the longer, the more focused and concentrated. This is why I make mine shorter. |
#1000
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This thread was automatically split due to performance issues. You can find the rest of the thread here: http://archive.reefcentral.com/forum...hreadid=823609
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