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

JohnL · 03/03/2006, 12:30 AM

This thread was automatically split due to performance issues. You can find the rest of the thread here: http://reefcentral.com/forums/showth...55#post6869555

dhnguyen · 03/03/2006, 12:30 AM

You might try shorten whole rigid tube/propeller assembly as bit and see if it would help.

I have no problems turning a 1.75" Dumas prop with the MJ1200 even a MJ900. How old is that MJ1200? Possibly the motor has worn out a bit and doesn't have as much horse power? Not sure...

D.

mupham · 03/03/2006, 09:47 AM

The Maxijet is about 3 years old I think. I have another one the same age in my tank right now that I will give a try. It looks like the magnet is centered and not touching the inside of the housing. I'm wondering if the carbon fiber rod is flexing more than the steel one did and causing the magnet to rub against the side. It just sounds funny, like something is rubbing/rattling, when I run it for brief periods out of the water. When I run it about 3/4 submerged it really runs well, but fully submerged stalls out.

Thanks again for the well documented Mod. I hope I can get this issue worked out.

Regards,
Mike

dhnguyen · 03/03/2006, 10:25 AM

Quote:

Originally posted by mupham
The Maxijet is about 3 years old I think. I have another one the same age in my tank right now that I will give a try. It looks like the magnet is centered and not touching the inside of the housing. I'm wondering if the carbon fiber rod is flexing more than the steel one did and causing the magnet to rub against the side. It just sounds funny, like something is rubbing/rattling, when I run it for brief periods out of the water. When I run it about 3/4 submerged it really runs well, but fully submerged stalls out.

Thanks again for the well documented Mod. I hope I can get this issue worked out.

Regards,
Mike

AH... If it's rattling and sounds like it's rubbing, chances are your impeller is off centered. Try re-centering the cross brace while the powerhead is plugged in outside the tank. Listen and see where is quietest, mark the spot and glue it down. It would take a tremendous amount of force and be very difficult to bend the carbon fiber so I don't think that's the issue here.
Do try putting in a couple more inlet slots as well.

thefuture · 03/03/2006, 09:41 PM

is the version of the mod found in this thread the latest? http://www.reefcentral.com/forums/sh...hreadid=717034

dhnguyen · 03/03/2006, 10:28 PM

well I can't speak for others but mine is on page 26 of that thread

thefuture · 03/04/2006, 02:41 AM

how many of the maxijets and at what size (gph) do u think i should need for my tank which i plan to keep sps in. http://www.reefcentral.com/forums/sh...hreadid=787452
that is a link to the tank with pics and dimensions

thefuture · 03/04/2006, 10:58 AM

is any one up to making me one/2 of the mods? for a price. i am kind of DIY illiterate and dont really have the equipment necesary

dvanacker · 03/04/2006, 11:55 AM

email this guy.... Lutz439@zoominternet.net

he is making them....nice from the pics I have seen.

thefuture · 03/04/2006, 12:12 PM

is he on reefcentral? if so whats his name or can u give me a link to where u saw the pics?

dhnguyen · 03/04/2006, 12:52 PM

You hvae a 24 g flat back hex, I don't think you're going to need much more in terms of flow than that SEIO 620 to be honest. If you still wanted a maxi-mod, I would recommend a MJ400 or MJ600 at most.

D.

Brent Thomann · 03/04/2006, 01:29 PM

Quote:

Originally posted by dvanacker
email this guy.... Lutz439@zoominternet.net

he is making them....nice from the pics I have seen.

I just received two from Matt, he said they would work great on a wavemaker but half the time they start up they go backwards, and loud. I had to remove them, my fish were going to be chopped up if I didn't. I emailed him a few days ago but no response back and he shut down his PM. Hate to have to do a charge back.

anyone else have this problem? using a MJ900.

dhnguyen · 03/04/2006, 01:34 PM

He wouldn't have this problem of reverse spinning if he had made a stopper in the first place. Mine starts up the the right way every time and is quiet. There will always be some humming because of the propeller but nothing you would notice IMO.

IF you post a photo of this I can probably tell you how to make a stopper to prevent the reverse spinning.

D.

zapata41 · 03/04/2006, 02:21 PM

i thought his design has a built in stopper.

also he got kicked off of RC for selling these things, doesnt mean he is a dead beat or anything like that. i emailed him the other day regarding prices and received a responce the next day.

Tim

dhnguyen · 03/04/2006, 04:27 PM

Quote:

Originally posted by zapata41
i thought his design has a built in stopper.

also he got kicked off of RC for selling these things, doesnt mean he is a dead beat or anything like that. i emailed him the other day regarding prices and received a responce the next day.

Tim

Yes I heard he had a stopper built in into the impeller/propeller but from what people have been saying is that it doesn't work.

Not sure how you can even have a stopper built in onto the impeller to stop the reverse spinning.

D.

dhnguyen · 03/04/2006, 05:07 PM

Also... The way I heard it was that he got booted from RC not because he was selling them but that he was doing on the forum by posting on the threads which is strictly prohibited. RC is pretty strict about stuff like that.

D.

thefuture · 03/04/2006, 05:19 PM

Quote:

Originally posted by dhnguyen
You hvae a 24 g flat back hex, I don't think you're going to need much more in terms of flow than that SEIO 620 to be honest. If you still wanted a maxi-mod, I would recommend a MJ400 or MJ600 at most.

D.

i was thinking of gettin the MJ in place of the sieo. i havnt bought most of my equipment yet. still planing. lol

dhnguyen · 03/04/2006, 06:32 PM

OK if you haven't bought the SEIO 620 then I would suggest a MJ400 or MJ600 for this mod instead. They work much better than SEIO's Others here can vouche for that

D.

diver0z2 · 03/05/2006, 03:57 PM

Ive never had a Seio but Ive had the same 2 MJ900's for the past 4 years.
The prop Mod by dhnguyen is awesome. With just 1 NITRO prop...size??) within the first week Iam seeing some amazing results. Its turning over 17 gal of water in a 29gal with 50lbs of LR @ 1100 -1300gph. In the REAL world, this chunk of reef would get 10-15k an hour of flow. Consider that.
Ive read other posts in here where 1 guy was saying with 2 NITRO props @ 1.75 on one MJ900 and what ever the pitch was, I dont remember, he says he is getting around 1800 gph with a MJ900.
Iam considering having the 2nd one done, but put them on timers...Eh dhnguyen????

Figure your actual REAL gallon amount here>>
in left side menu go to 'Claculators', then 'Tank Water Volume' scroll down

http://www.garf.org/

Just get a couple MJ's of what ever size and get them...or just 1....modified by dhnguyen ;-) His are already tested before he sends them back.

in the muff

jman77 · 03/05/2006, 04:12 PM

This mod is great ...i'm going to order the stuff to do it soon. I just wish i could DIY a better bracket to attach that MJ to the tank

dhnguyen · 03/05/2006, 06:27 PM

Quote:

Originally posted by jman77
This mod is great ...i'm going to order the stuff to do it soon. I just wish i could DIY a better bracket to attach that MJ to the tank

You can probably make a bracket for it out of a strip of acrylic easily. Just heat it with a heat gun and bend it to shape.

ChemE · 03/05/2006, 06:30 PM

Alternatively (if you're like me and don't have a heat gun), you can pop it in a 325F oven so that it is hanging over a glass dish turned upside down. When heat and gravity kick in it, you'll have your bend.

jman77 · 03/06/2006, 06:40 PM

Well Guys ..I ordered the props,glue, and carbon fiber rod from the hobby sore

.....

It should come in by next week ...hehheehhe

itstheantitang · 03/06/2006, 07:07 PM

Or use a long handled lighter to bend it, careful!
No fires!

Candles work too, I've tried it.

Safe reefing!!

jman77 · 03/06/2006, 07:20 PM

Yea .... I use a blow torch and runing it back in forth over the plastic to bend it ....

03/03/2006, 09:41 PM	#5
thefuture Registered Member Join Date: Nov 2005 Posts: 327	is the version of the mod found in this thread the latest? http://www.reefcentral.com/forums/sh...hreadid=717034 __________________ PS3 20GB 4 sale - 570$ Highland, Ca 92346! (909) 725-6055.

03/04/2006, 02:41 AM	#7
thefuture Registered Member Join Date: Nov 2005 Posts: 327	how many of the maxijets and at what size (gph) do u think i should need for my tank which i plan to keep sps in. http://www.reefcentral.com/forums/sh...hreadid=787452 that is a link to the tank with pics and dimensions __________________ PS3 20GB 4 sale - 570$ Highland, Ca 92346! (909) 725-6055.

03/04/2006, 10:58 AM	#8
thefuture Registered Member Join Date: Nov 2005 Posts: 327	is any one up to making me one/2 of the mods? for a price. i am kind of DIY illiterate and dont really have the equipment necesary __________________ PS3 20GB 4 sale - 570$ Highland, Ca 92346! (909) 725-6055.

03/04/2006, 11:55 AM	#9
dvanacker DID I SOUNDS SMRT?? Join Date: Aug 2005 Location: Woodstock, Ontario Posts: 2,024	email this guy.... Lutz439@zoominternet.net he is making them....nice from the pics I have seen. __________________ --DARRYL-- Current Tank Info: 200g SPS dominant Mixed Reef

03/04/2006, 12:12 PM	#10
thefuture Registered Member Join Date: Nov 2005 Posts: 327	is he on reefcentral? if so whats his name or can u give me a link to where u saw the pics? __________________ PS3 20GB 4 sale - 570$ Highland, Ca 92346! (909) 725-6055.

03/03/2006, 12:30 AM	#1
JohnL RC Staff Join Date: Oct 1999 Location: Long Island, NY Posts: 14,293	This thread was automatically split due to performance issues. You can find the rest of the thread here: http://reefcentral.com/forums/showth...55#post6869555

03/03/2006, 12:30 AM	#2
dhnguyen Moved On Join Date: May 2004 Location: Kingston, WA Posts: 4,788	You might try shorten whole rigid tube/propeller assembly as bit and see if it would help. I have no problems turning a 1.75" Dumas prop with the MJ1200 even a MJ900. How old is that MJ1200? Possibly the motor has worn out a bit and doesn't have as much horse power? Not sure... D.

03/03/2006, 09:47 AM	#3
mupham Registered Member Join Date: Nov 2004 Location: West Chicago Posts: 30	The Maxijet is about 3 years old I think. I have another one the same age in my tank right now that I will give a try. It looks like the magnet is centered and not touching the inside of the housing. I'm wondering if the carbon fiber rod is flexing more than the steel one did and causing the magnet to rub against the side. It just sounds funny, like something is rubbing/rattling, when I run it for brief periods out of the water. When I run it about 3/4 submerged it really runs well, but fully submerged stalls out. Thanks again for the well documented Mod. I hope I can get this issue worked out. Regards, Mike

03/03/2006, 10:28 PM	#6
dhnguyen Moved On Join Date: May 2004 Location: Kingston, WA Posts: 4,788	well I can't speak for others but mine is on page 26 of that thread

03/04/2006, 12:52 PM	#11
dhnguyen Moved On Join Date: May 2004 Location: Kingston, WA Posts: 4,788	You hvae a 24 g flat back hex, I don't think you're going to need much more in terms of flow than that SEIO 620 to be honest. If you still wanted a maxi-mod, I would recommend a MJ400 or MJ600 at most. D.

03/04/2006, 01:34 PM	#13
dhnguyen Moved On Join Date: May 2004 Location: Kingston, WA Posts: 4,788	He wouldn't have this problem of reverse spinning if he had made a stopper in the first place. Mine starts up the the right way every time and is quiet. There will always be some humming because of the propeller but nothing you would notice IMO. IF you post a photo of this I can probably tell you how to make a stopper to prevent the reverse spinning. D.

03/04/2006, 02:21 PM	#14
zapata41 Moved On Join Date: Aug 2004 Location: Humboldt County, CA Posts: 2,059	i thought his design has a built in stopper. also he got kicked off of RC for selling these things, doesnt mean he is a dead beat or anything like that. i emailed him the other day regarding prices and received a responce the next day. Tim

03/04/2006, 05:07 PM	#16
dhnguyen Moved On Join Date: May 2004 Location: Kingston, WA Posts: 4,788	Also... The way I heard it was that he got booted from RC not because he was selling them but that he was doing on the forum by posting on the threads which is strictly prohibited. RC is pretty strict about stuff like that. D.

03/04/2006, 06:32 PM	#18
dhnguyen Moved On Join Date: May 2004 Location: Kingston, WA Posts: 4,788	OK if you haven't bought the SEIO 620 then I would suggest a MJ400 or MJ600 for this mod instead. They work much better than SEIO's Others here can vouche for that D.

03/05/2006, 03:57 PM	#19
diver0z2 Registered Member Join Date: Feb 2006 Posts: 18	Ive never had a Seio but Ive had the same 2 MJ900's for the past 4 years. The prop Mod by dhnguyen is awesome. With just 1 NITRO prop...size??) within the first week Iam seeing some amazing results. Its turning over 17 gal of water in a 29gal with 50lbs of LR @ 1100 -1300gph. In the REAL world, this chunk of reef would get 10-15k an hour of flow. Consider that. Ive read other posts in here where 1 guy was saying with 2 NITRO props @ 1.75 on one MJ900 and what ever the pitch was, I dont remember, he says he is getting around 1800 gph with a MJ900. Iam considering having the 2nd one done, but put them on timers...Eh dhnguyen???? Figure your actual REAL gallon amount here>> in left side menu go to 'Claculators', then 'Tank Water Volume' scroll down http://www.garf.org/ Just get a couple MJ's of what ever size and get them...or just 1....modified by dhnguyen ;-) His are already tested before he sends them back. in the muff

03/05/2006, 04:12 PM	#20
jman77 Registered Member Join Date: Apr 2005 Location: West Palm Beach, Florida Posts: 2,536	This mod is great ...i'm going to order the stuff to do it soon. I just wish i could DIY a better bracket to attach that MJ to the tank

03/05/2006, 06:30 PM	#22
ChemE Registered Member Join Date: Aug 2005 Location: Urbana, Illinois Posts: 1,631	Alternatively (if you're like me and don't have a heat gun), you can pop it in a 325F oven so that it is hanging over a glass dish turned upside down. When heat and gravity kick in it, you'll have your bend. __________________ Holding it down on the engineering tip y'all Current Tank Info: 190G

03/06/2006, 06:40 PM	#23
jman77 Registered Member Join Date: Apr 2005 Location: West Palm Beach, Florida Posts: 2,536	Well Guys ..I ordered the props,glue, and carbon fiber rod from the hobby sore ..... It should come in by next week ...hehheehhe

03/06/2006, 07:07 PM	#24
itstheantitang Registered Member Join Date: Dec 2005 Posts: 481	Or use a long handled lighter to bend it, careful! No fires! Candles work too, I've tried it. Safe reefing!! __________________ Ignore the smoke and smile...

03/06/2006, 07:20 PM	#25
jman77 Registered Member Join Date: Apr 2005 Location: West Palm Beach, Florida Posts: 2,536	Yea .... I use a blow torch and runing it back in forth over the plastic to bend it ....