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Old 03-18-2007, 12:57 AM   #511
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To answer the question regarding magnet zappers effecting a motor.....yes, that can happen.

Anyone that ran a Reedy MVP knew it was a horrid stock motor. The reason is really sucked bad, was because the magnets in it were the really good FB-9 series magnets, which is used in most of the modifieds. The problem with them though was they were SO powerful that the light weight arm Reedy had designed simply didn't spool up worth a crap......so, to reduce the magnetic field, we did things like using a torch the can past the magnet's temp range, thus reducing their power....which allowed the arm to spin up better. I used this trick on some motors at paved nats in 2004 in portland, though I hid it from everyone there by doing it up in my room.....

How this applies to your motor is a little smaller in scale. Sometimes, the magnet just has a sweet spot with the arm and the rest of the motor. So, everything is working together.....and then you zap the can, the magnets get stronger, which limits the spool.....and the motor feels like it lost something. This is not always the case, but it can happen......run the motor a couple more times and often you will see the magnets lose some power and the motor is suddenly fast again.

Now, it could be a bunch of other things that did it....but, it can happen.

Later EddieO
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Old 03-18-2007, 05:14 PM   #512
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Default CP19 gearing

Voodooph,

we run CP19T here in the UK (a finals) also in a BD with Infinity brushes.
outdoors the ratio is 5.53 and indoors it is 6.15.
We always run a complete days racing (3 quals and 2 finals without touching the motor.
All with WC SMC 4200 cells.

rehards

Don
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Old 03-18-2007, 06:54 PM   #513
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Quote:
Originally Posted by donwhit
Voodooph,

we run CP19T here in the UK (a finals) also in a BD with Infinity brushes.
outdoors the ratio is 5.53 and indoors it is 6.15.
We always run a complete days racing (3 quals and 2 finals without touching the motor.
All with WC SMC 4200 cells.

rehards

Don
does the comm turn puple on you guys with those gear ratios?
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Old 03-18-2007, 06:59 PM   #514
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Default CP19 gearing

VooDooPH,

no, they are a little darker than yours.
Do you run a fan? We run a twin fan (endbell and case) from Coolcan.

In general we found that the motor seems to like to be geared up.

regards

Don
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Old 03-19-2007, 04:04 AM   #515
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run with 1 fan on the endbell. the pic posted was from a previous practice day. it was on the succeeding practice day, noticed the comm turning purple and red but the brushes were fine and the can came in at about 152deg.
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Old 03-19-2007, 10:21 AM   #516
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I was wondering what is faster a brushless"equivalent"19turn or a brushed 19turn for off-raod.thanx for your time
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Old 03-19-2007, 11:06 AM   #517
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also in the motors are their 19 turns around the arm? Or do they do it some other way because I know they are called like by weird numbers and pionts!
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Old 03-19-2007, 01:39 PM   #518
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Thanks for the ideas Eddie O
Acutually that (from a tech pov) answers a lot of questions/suppositions from a track-based, gut instinct pov.
I wonder if there is anyway to pinpoint the sweet spot to which you refer with a given motor...and then duplicate, accentuate it....?
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Old 03-19-2007, 08:54 PM   #519
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Please help with the posts above!
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Old 03-20-2007, 08:06 PM   #520
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Whats the difference from kd to the hemi kd?
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Old 03-20-2007, 08:53 PM   #521
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Quote:
Originally Posted by AE 14year-old
also in the motors are their 19 turns around the arm? Or do they do it some other way because I know they are called like by weird numbers and pionts!

19 turns of wire around every segment on the armature
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Old 03-20-2007, 10:05 PM   #522
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Quote:
Originally Posted by AE 14year-old
I was wondering what is faster a brushless"equivalent"19turn or a brushed 19turn for off-raod.thanx for your time
I dont know if there even is a "brushless 19t" your best bet would be to go to the local track where you plan to race and talk to the people who race there, and you will find out what people are running for the 19t class. Faster isnt alway better, on a tight technical track you will want more torque what good is a high rpm motor is you dont have enough room to open it up
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Old 03-20-2007, 10:13 PM   #523
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Quote:
Originally Posted by 247
Whats the difference from kd to the hemi kd?
If I'm not mistaken it is has to do with the wire gauge, but I could be wrong
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Old 03-20-2007, 10:27 PM   #524
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If u go to the EA thread and do a search on Ďhemií, uíll find a brief explanation.
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Old 03-24-2007, 11:51 PM   #525
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tryed ea theaded nothing.
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