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Old 04-08-2003, 08:37 AM   #1
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Default Yokomo Motor Management System

Hi guys. Greetings from Malta.

I recently purchased a Yokomo Motor management System.

It is a neat unit which indicates motor condition (brush and comm), rpm, and current draw, at a given voltage. Voltage is regulated.

Whilst the unit itself is smart, the instructions are typically Yokomo - bloody aweful!

What I would like to know is what is a good current draw figure for a good motor. I am mainly interested in 9, 10, 11, and 12 turn mod motors and 21 turn stock motors.

If anybody has used these units successfully, perhaps you would be kind enough to help.

Max rev figures are interesting. I found an improvement from 44000 to 53000 on the same 10 x 1 motor by just changing brush types but I don't know if in fact the 53000 rpm set up is actually the better one on the track.

Can anyone help?

Thanks and regards

Joe from sunny Malta.
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Old 04-08-2003, 12:04 PM   #2
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Default Re: Yokomo Motor Management System

Quote:
Originally posted by johnbull
Hi guys. Greetings from Malta.

I recently purchased a Yokomo Motor management System.

It is a neat unit which indicates motor condition (brush and comm), rpm, and current draw, at a given voltage. Voltage is regulated.

Whilst the unit itself is smart, the instructions are typically Yokomo - bloody aweful!

What I would like to know is what is a good current draw figure for a good motor. I am mainly interested in 9, 10, 11, and 12 turn mod motors and 21 turn stock motors.

If anybody has used these units successfully, perhaps you would be kind enough to help.

Max rev figures are interesting. I found an improvement from 44000 to 53000 on the same 10 x 1 motor by just changing brush types but I don't know if in fact the 53000 rpm set up is actually the better one on the track.

Can anyone help?

Thanks and regards

Joe from sunny Malta.


I too Have a MMS I think it's great for the price! ...pretty dead on for #'s too.... I can tell you one thing about this....It's very helpful for paking small changes to the motor and seeing the differance on the track... Brushes/Com Cut/Springs it's great for the Price!! ..
Now as far as the 21T stocks go..??? I can help you with what I get from my 23T stockers. I get about 31000RPM~33000RPM and I pull 4~5.3amps at 7.2V...
one more thing thats great about the MMS is that it tells you if your brush condition

-Dave
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Old 04-09-2003, 02:13 AM   #3
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Hi JDM. Greetings from Malta.

Thanks for your help.

What I would like to know is, does a higher amp draw number definately mean a more powerful motor.

With 21 turn and 23 turn stock motors we don't have problems with duration, so the more power you can extract the better. My 21 turn stock motors turn about the same sort of revs.

With mod there is the duration problem to worry about so one has to look at other considerations.

Any more help will be appreciated.

I have bolted a motor clamp and fan onto mine so it's now a neat and compact unit - and it all sits on it's own neat power supply.

Regards

Joe from sunny Malta.
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Old 04-09-2003, 03:46 AM   #4
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I've seen the MMS in action at my local shop, we spent an hour messing around with a few stock motors. The figures are interesting as a general indication of motor condition and performance, but I don't think they'll tell you much about the car on track as it's under no-load.

For example, we compared my p2k2, with the shop-bloke's p2k2 and Monster. My p2k2 was in better condition than his, and pulled slightly less amps for similar revs (around 2A/19000 at 5v if I recall). The Monster pulled huge current, for much more revs (around 7A/26000). The thing is, even if you took the voltage way down, the Monster would still pull 7A. On the track, the monster is quicker, but not 30% quicker or more powerful.

So, a nice way to work out which motors are in good nick and which aren't, and which changes improve general performance, but I wouldn't say you could use it to say "this motor will be this much faster around the track".
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Old 04-09-2003, 07:14 AM   #5
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Anyone know a web site with specs and photos on this?????
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Old 04-09-2003, 07:44 AM   #6
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Anyone got figures for 10 turn and 12 turn mod motors?
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Old 04-09-2003, 09:09 AM   #7
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Alan,

go there :
http://www.teamyokomo.com/japan/manual/index.html

you'll find the MMS manual with pics.
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Old 04-09-2003, 09:12 AM   #8
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Thanks

Alan
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Old 04-09-2003, 09:24 AM   #9
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Does anyone think that this is better than the Indi Motor Checker-Dyno ??? I am looking at buying something but not sure which one??
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Old 04-10-2003, 08:16 PM   #10
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Anyone else with any hands on time with the MMS..???

-Dave
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Old 04-11-2003, 12:22 AM   #11
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Anyone know if Yokomo USA is going to import to the states???
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Old 04-11-2003, 10:15 AM   #12
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Default Amp draw!

Are Trinity motors that we run at the events tend to draw anywere from 9-12 amps(@3 volts free-runing)this is for touring car racing.
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Old 04-11-2003, 02:33 PM   #13
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Quote:
Originally posted by rto997
Anyone know if Yokomo USA is going to import to the states???

Talk to Steve a SpeedTech . He might be able to work something out

-Dave
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Old 04-11-2003, 02:46 PM   #14
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Yeah i got one of these a few months ago, it's not bad and is good for its cheap price tag. One thing i do find really annoying is having to hold the sensor up to the motor to take a reading
JOHNBULL- you said you had some king of jig to hold the motor and it had a fan, sounds cool. got any pics? i'd be very interested to see it.
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Old 04-11-2003, 03:00 PM   #15
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Quote:
Originally posted by TRF414WCR
Yeah i got one of these a few months ago, it's not bad and is good for its cheap price tag. One thing i do find really annoying is having to hold the sensor up to the motor to take a reading
JOHNBULL- you said you had some king of jig to hold the motor and it had a fan, sounds cool. got any pics? i'd be very interested to see it.
I too have a small metal jig that I have made up to hold the sensor ... I'll have to look for a Pic' I have it on my hard drive somewheres .but it makes it so much easier to take readings from the motor that way
-Dave
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