danner mag drive question

hellacooldude · 08-30-2001, 06:48 PM

hi

i am new to these forums, in the form of posting that is, now i have been water cooling for about a year and i have always used a el cheapo rio 180, until it recently failed on me (i knew it would happen). so to replace it i ordered a danner mag drive rated at 500 gph, a would be huge increase for me even with adding 3/8 barbs, but it seems to have a problem. everytime i start the pump it rattles around for a few seconds, sometimes minutes, before it actually kicks in and starts flowing at its normal rate, i have done the impeller quieter thingy, and i am wondering maybe it is just me with my bad job on connecting those but it seems odd because it can take a full 5 minutes to get started sometimes, any help with this would be much appreciated

BrianW · 08-30-2001, 08:54 PM

I think I know what is happening.

The mod you did to your impeller was the one where you superglue the impeller to the shaft so it does'nt have 180 degrees of movement. If so, thats the reason.

You see the reason that play is allowed on the impeller, is due to the low amount of torque the magdrive has. So the shaft/motor is allowed to speed up a bit before it meets the resistance of the ipeller/water.

Now that you have glued it together you have negated some engineers brilliant solution to a design problem.

Buy a replacement impeller/shaft and ur problem should go away.

hellacooldude · 08-31-2001, 12:45 AM

very interesting, hmm, so why is it that people do the mod sometimes? and by the way thanks for the help im gonna get a replacement ASAP

soja · 09-03-2001, 01:39 AM

i was thinking of doing this right now until this thread. so what is bad about it? does it quiet the pump?

08-30-2001, 06:48 PM	#1
hellacooldude Cooling Neophyte Join Date: Aug 2001 Posts: 2	danner mag drive question hi i am new to these forums, in the form of posting that is, now i have been water cooling for about a year and i have always used a el cheapo rio 180, until it recently failed on me (i knew it would happen). so to replace it i ordered a danner mag drive rated at 500 gph, a would be huge increase for me even with adding 3/8 barbs, but it seems to have a problem. everytime i start the pump it rattles around for a few seconds, sometimes minutes, before it actually kicks in and starts flowing at its normal rate, i have done the impeller quieter thingy, and i am wondering maybe it is just me with my bad job on connecting those but it seems odd because it can take a full 5 minutes to get started sometimes, any help with this would be much appreciated

08-30-2001, 08:54 PM	#2
BrianW Cooling Savant Join Date: Jun 2001 Location: Desert City in California Posts: 631	I think I know what is happening. The mod you did to your impeller was the one where you superglue the impeller to the shaft so it does'nt have 180 degrees of movement. If so, thats the reason. You see the reason that play is allowed on the impeller, is due to the low amount of torque the magdrive has. So the shaft/motor is allowed to speed up a bit before it meets the resistance of the ipeller/water. Now that you have glued it together you have negated some engineers brilliant solution to a design problem. Buy a replacement impeller/shaft and ur problem should go away. __________________ Water Cooled Inwin Q500 (Dual Rads: Rad1 = DTEK Pro Core \| Rad2 = Blick Ice Estreme, Hydor L30, Dangerden Maze2, Bay Res Typhoon Reservoir, 1/2 " DD Tygon Thick Wall Hose). Flow: Res, Pump, CPU watervlock, Y into both rads, both rads into res independently. Athlon XP 1800+ (@ 1731 - 150mhz fsb.), on a Asus A7N266-c, and a Radeon 9000 *waiting for RMA'd Saphire 9800 ultra from Newegg)

09-03-2001, 01:39 AM	#4
soja Cooling Neophyte Join Date: Sep 2001 Location: OC, CA Posts: 22	i was thinking of doing this right now until this thread. so what is bad about it? does it quiet the pump? __________________ JIUHB 0319WPMW 1466 @ 2500 (185x13.5) 2.0v BBA 9700pro

08-31-2001, 12:45 AM	#3
hellacooldude Cooling Neophyte Join Date: Aug 2001 Posts: 2	very interesting, hmm, so why is it that people do the mod sometimes? and by the way thanks for the help im gonna get a replacement ASAP

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