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Old 02-25-2004, 09:09 PM   #1
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Default Magnet maintenance

I know that a zapper is the best way to keep your magnets in good shape but are there any other ways. I've heard of putting them in the freezer and also tapping the magnets to align the particals inside. Do you guys freeze your motors each week? This is for a johnson 540, stock motor(mvp) and a stock hybrid(orion rush stock motor can) I'll use if I run 19t, so every little bit helps. I only want LEGAL ways to make the mags stronger though.

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Old 02-26-2004, 07:30 AM   #2
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from what i learnt i science in high school hitting the magnet with another peice of hard metal strengthens the magnetic powers. so yeah HIT IT! the strength will disapear after a while.
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Old 02-26-2004, 07:41 AM   #3
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Chilling the motor before a run works well. Electricity flows better at lower temperatures...the colder the better.

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Old 02-26-2004, 08:03 AM   #4
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if you could only keep them that way........... hhmmmm
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Old 02-26-2004, 08:18 AM   #5
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Maybe we could fit one of the computer cooling systems to the motor?
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Old 02-26-2004, 10:49 AM   #6
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Get some Liquid Nitrogen, pour it in a styrofoam cooler, dunk the motor in it untill it stops boiling rapidly, pull it out with tongs, and hit it with a hammer.

On second thought, DONT DO IT.

I am sure the magnets will turn into hundreds of peices.
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Old 02-26-2004, 10:54 AM   #7
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My motors powered by Bud Light at 2004 Snowbirds



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Old 02-26-2004, 11:12 AM   #8
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What I have done racing outdoors when it was really hot was get some dry ice in a cooler, and place the motors on the block of dry ice in a plastic bag. Seemed to work pretty good.

Also, i did the fan trick on my TC3. That worked even better. On 90 degree days when the track was 120-140, my motors hardly hit 150. Before, they were getting so hot as to melt the brushes off the hoods. (mod)
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Old 02-26-2004, 01:43 PM   #9
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What you guys think on the reedy heatsink w/ fan? is it worth $22 Or should i purchase a different heatsink w/ fan?
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Old 02-26-2004, 03:58 PM   #10
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Make your own for the TC3. Get a small fan (5-12 volt) at radio shack, and mount it so it blows directly onto the endbell. You'll have to use a quantum speedo, or be creative with the mounting of the electronics.

I also dremeled out some of the brace material there to accomodate increased airflow.

Even though I am using a 12 volt fan, it still runs on 7, and the motors never come off over 150 degrees. The brushes and comm seem to last longer too.
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Old 03-02-2004, 02:30 AM   #11
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Quote:
Originally posted by PitCrew
Make your own for the TC3. Get a small fan (5-12 volt) at radio shack, and mount it so it blows directly onto the endbell. You'll have to use a quantum speedo, or be creative with the mounting of the electronics.

I also dremeled out some of the brace material there to accomodate increased airflow.

Even though I am using a 12 volt fan, it still runs on 7, and the motors never come off over 150 degrees. The brushes and comm seem to last longer too.

Hi PitCrew,

How do you use with the Quantum speedo??? With the FET servo lead?? Can you post the pic of the fan in your car attached with the speedo.

Thanks Heaps.....PitCrew
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Old 03-02-2004, 03:18 AM   #12
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anything you do to a magnet that is not in a zapper will weaken the magnet (except cooling). If you hit a magnet while it is being zapped then the zapping will be more affective but don't hit it any other time as it will have the opposite affect.

I have tried different fans to cool motors and find they are only good for cooling the com/brushes when pointing straight at the endbell as close as possible. don't wast time putting them at angles as they do very little (like reedy one). the lower the voltage the better it will work. if you want to keep magnets cool, put heatsink compound on your heatsinks as they do very little without it.
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