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Old 02-05-2002, 12:50 AM   #1
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Default Silver can stock motor, battery choice?

I'm going to run regular stock johnson/mabuchi silver can motors, what type of battery would give me the best performance? Run time isn't really a factor, since these motors take so little power. I just have to make 5 minutes.. would 1400s be best if I can still find some new ones matched? How about 2000s, or the new 3000HVs? How do these batteries compare? Thanks in advance for any info.
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Old 02-05-2002, 02:26 AM   #2
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2400 is best ... but some say 3000hv ...
i haven tried 3000hv so i dare not say
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Old 02-05-2002, 09:28 PM   #3
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ok.. but don't 1400s have lower internal resistance? How do the voltages compare? Also, 1400s are lighter.. but are these advantages significant? And if I were to get the newer batteries, should I just go for 3000s, since the 2400s have less capacity, same voltage, and cost almost as much?
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Old 02-06-2002, 07:39 AM   #4
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Use SMH 3000. although I have not tried HV's I can get this motor to go pretty good with these batteries. Are you planning on racing TCS?
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Old 02-06-2002, 07:47 AM   #5
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Potato: I think most of these people are missing your point. Their so used to telling people to buy big time batteries that they cant even hear what your asking.

I say go with a low cost 1700 pack. It will give you plenty of boost and runtime, and it wont add unneccesary weight.

If you must go for stronger heavier batteries, I say go for 3000HV/SMH batteries. I don't think regular 3000 low voltage batteries combined with the already weak 540 motor would make a very appealling combo.

Honestly though, I think the RC1700 cells are your best choice if you don't need high capacity and are trying to save weight. Thats what I run in my F1 car.
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Old 02-06-2002, 08:58 AM   #6
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Rc1700 are probably the best batteris to get for a Silver can motor, just as DarkSeid stated. You get more punch out of those batteries then you would with 2400 or 3000. Get the 1700's you wont be disappointed.
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Old 02-06-2002, 09:20 AM   #7
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We've used Trinity 1400 scr cells when racing our Tamiya mini -- lightweight and lots of punch, more so than 1500s or even 1700s (and there is a 1500 mah limit anyway per class rules).

Regarding the silver cans, we stick to Johnsons and use the water dip method to break in the brushes.
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Old 02-06-2002, 09:52 AM   #8
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coolrcdad - is your son still running in mini?

on that 1500 limitation is that a local track rule or Tamiya TCS rule?

That water dipping works to break in the motor brushes but doesn't add any HP.
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Old 02-06-2002, 11:49 AM   #9
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Thanks for the suggestions guys. Know of anywhere to find 1400 cells nowadays?
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Old 02-06-2002, 12:01 PM   #10
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Potato -- Trinity makes 1400scr packs; you should be able to get them at your LHS or by mail order.

Mike -- We still have the car but we're not sure what we will be running this season. Sam's leaning toward GT1 and 2. The 1500 rule is a local club rule; the owner tries to keep the cost of some of the classes down, such as Mini, TL-01 and trucks. However, he's going to follow TCS battery rules for stock and modified and allow up to 3000.

I thought the water dip method eked more HP out of the motor; everyone at the nats a few years ago did this to their hand out 540s. Does it just improve electricity transfer?
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Old 02-06-2002, 12:15 PM   #11
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I believe water dipping produces more power.. The brushes in the silver can motor are very very hard, so water dipping breaks them in much faster. Also, I think the silver can motor runs better as it gets older, because the brushes wear in and increase the motor's timing... but I'm not sure about that.


Do you ever have trouble making 5 minutes with 1400s? I guess that's the only part that worries me.. I'm running F1 with the silver can motor. Also, how much do the batteries cost now? Around $30? I can save a lot of money by getting 1400s.
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Old 02-06-2002, 12:31 PM   #12
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I think your correct about the older they get but I'm still not sure about the water dipping. I know that's they way to break inthe brushes but I know that there's something that you can do to change the timing on that motor,not legal I know but not easily detected either. I know for a fact that there's some gys that do it. I ran in KS last year at a TCS and I have the M02L MINI that I ran with standard tires and this guy with a mini cooper with little tires lapped me twice and so did his partner. I finished 4th that year and 2nd the previous year.

F-1, Potato what gear ratio are you running? This will be my first year in F-1. I'm thinking about running a P2K2 Pro. Final gear ratio is 5.2
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Old 02-06-2002, 03:37 PM   #13
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Mike F, there is an illegal way to change the timing but it's not what I mean. The brushes on the 540 are mounted differently from regular stock motors. The 540 has brushes mounted on metal tabs, and as the brushes wear, the tabs push closer and closer. It's hard to explain, but what happens is as the brushes wear down, the timing increases, and this makes the motor faster. That's why the water dipping method increases power, by wearing down the brushes.

I'm not sure what gearing I have, I don't have my car with me right now. I think it's somewhere around 18 teeth, with the stock tamiya 48p metric spur gear.
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Old 02-06-2002, 03:55 PM   #14
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Quote:
Originally posted by Potato
Mike F, there is an illegal way to change the timing but it's not what I mean. The brushes on the 540 are mounted differently from regular stock motors. The 540 has brushes mounted on metal tabs, and as the brushes wear, the tabs push closer and closer. It's hard to explain, but what happens is as the brushes wear down, the timing increases, and this makes the motor faster. That's why the water dipping method increases power, by wearing down the brushes.

I'm not sure what gearing I have, I don't have my car with me right now. I think it's somewhere around 18 teeth, with the stock tamiya 48p metric spur gear.
Then water dipping it is. I'll keep running my 540 in water and see if it changes the RPM but I sure would like to know how to change the timing, do you know? PM me if you do.
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Old 02-06-2002, 06:21 PM   #15
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water dipping does not make a difference on the new motors. On the old motors it does make a difference, but not with the new ones.
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