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Old 01-03-2002, 04:22 AM   #1
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Default Motor RPM

hey...i was wondering what rpm range goes for different turns or motor.

whats the rpm of a 12t, 10t, and 9t motor?
thanks!
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Old 01-03-2002, 07:24 AM   #2
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My Evo4 8T : 48500 RPM
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Old 01-03-2002, 07:51 AM   #3
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My Yokomo SZero 9T3 has 46.500 rpm
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Old 01-03-2002, 08:20 AM   #4
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what about yokomo 12x2?
you know the rpm for it? approximatly?
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Old 01-03-2002, 08:41 AM   #5
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Quote:
Originally posted by Disaster999
what about yokomo 12x2?
you know the rpm for it? approximatly?
it's about 37000-40000 maybe
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Old 01-03-2002, 08:54 AM   #6
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Quote:
Originally posted by daniz24


it's about 37000-40000 maybe
oh...soso...for 10t...its about 42000-45000....and for a 9t is 45000-48000...??
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Old 01-03-2002, 01:00 PM   #7
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For touring cars RPM hardly matters at all What you should be asking is the power and torque numbers.
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Old 01-03-2002, 01:08 PM   #8
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Those ratings are with a no load max RPM rating. I would imagine that a motor with a noticeable amount more of torque but with a lower no load max rpm should be able to maintain a higher rpm with a load put on it due to the higher amount of torque giving the motor more power as per say. Therefore actually giving it a higher speed than a high rpm motor with low torque when both have the load of a cars drivetrain that it has to lug, unless you are using a pan car which will have far less drivetrain lag. I could be wrong though, but it sounds logical, lol.
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Old 01-03-2002, 02:44 PM   #9
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Quote:
Originally posted by WailinOnYa
Those ratings are with a no load max RPM rating. I would imagine that a motor with a noticeable amount more of torque but with a lower no load max rpm should be able to maintain a higher rpm with a load put on it due to the higher amount of torque giving the motor more power as per say. Therefore actually giving it a higher speed than a high rpm motor with low torque when both have the load of a cars drivetrain that it has to lug, unless you are using a pan car which will have far less drivetrain lag. I could be wrong though, but it sounds logical, lol.
No, those have to be dyno numbers, in which case there is a load. In the case of a flywheel dyno, eg robi, it is the flywheel and on a dyno like the CE it is the slave motor. But as Big Jim says, power is RPM*torque, and even a small increase in torque is enough to compensate for a loss in RPM. I don't really even look at RPM. First I look at power in a certain load range, then at max power, then at torque, then spinup time.
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Old 01-03-2002, 08:02 PM   #10
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thanks for the input! i wanted to know the rpm of the motor because i want to find out how fast my car would go!!
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Old 01-03-2002, 08:16 PM   #11
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depends disaster
a FURY 10x3 gives around 58000 rpm
after thinkering here and there but ... u will need 9:1 gearing and higher to make it work COOL .... or else ... u can easilly place a pan over the motor and cook an egg there LOL

but battry wires get super and solder joints might melt off and ....tires + belt never lasts
and .... according to a local experianced racer there he says the dyno might be wrong or might be faulty .... but hey its the fastest motor on the track ....

hehe ever seen a battry pack sorted out after the solder joints melted on it .... happened when i used this motor ...
and its 60.40 solder

sold this motor to someone and he retired it ... after breaking his pro 2 LOL
HAHAHAHHAH guess how much i sold the motor ... second hand ... USD 80 he offered me 50 i did not want to sell and he raised the price to 80 .... and its just too tempting ... got a 13x3 with the money and the rpm is at around 39000 rpm

Last edited by imataquito; 01-03-2002 at 08:29 PM.
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Old 01-03-2002, 08:36 PM   #12
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[QUOTE]Originally posted by imataquito
[B]depends disaster
a FURY 10x3 gives around 58000 rpm
after thinkering here and there but ... u will need 9:1 gearing and higher to make it work COOL .... or else ... u can easilly place a pan over the motor and cook an egg there LOL
QUOTE]

I think your motor is over-timing..... 10T should be around 45000-48000 rpm....
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Old 01-03-2002, 11:45 PM   #13
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Dudes, what's the difference between a Motor Dyno (e.g Robotronics) versus "Motor Dressers" and "Motor Checker" e.g. , SpeedPro, Team Orion

Thanks.
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Old 01-03-2002, 11:46 PM   #14
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timing is set to 4-5 on the end bell to can part
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Old 01-04-2002, 12:31 AM   #15
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Speedo: Yeah you have a point there, but Trinity put out max RPM numbers on their motors even before there was such a thing as an electric motor dyno! Now I don't know if they had a custom built machine that they used to get these numbers or if they were just using a Tach with a given voltage to get the readings or not but even a flywheel on a dyno is far from a close realistic figure compared to being in an actual car with all the driveline drag, resistance and friction. Now that I say this I am kinda curious how they got these #'s way back when! Dynos are a pointer to which motor will be better suited to it's use, which in turn also relates to in car use, a better motor is a better motor, but the flywheel readings would still be drastically different than what will be achieved in the car itself, if it were possible to measure it there.

Last edited by WailinOnYa; 01-04-2002 at 12:41 AM.
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