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Old 03-15-2010, 05:43 AM   #1
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Default 9T sensorless vs 13.5T sensored spec class

Hi

Here in Norway we have a retro class in the making. only beginner chassies and 85mod or older bodies. tires must be grooved and in the long run it will be a spec tire like HPI x-pattern. Dish wheels is not allowed.

Now i was wondering what power the EZrun 9T produces.

Is it equal to a 13.5T sensored or is it way faster? the average 13.5T produces 230 watts according to factory specs from 10 manufacturers.

The meaning about this two options is that if you want to go serious in this class and want the fastest motor then you are stuck with the 9T witch is cheap.

Now some people like me gets their hand on cheaper used or even not used sensored 13.5T motors. so thats all cool, the problem starts when there is one guy with the badest esc with the badest motor.

Will he keep up with the 9T EZrun?

any other gains he might have?
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Old 03-15-2010, 09:01 AM   #2
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So no one knows have a EZrun 9T is against a 13.5T?
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Old 03-15-2010, 09:21 AM   #3
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Quote:
Originally Posted by MatsNorway View Post
Hi

Here in Norway we have a retro class in the making. only beginner chassies and 85mod or older bodies. tires must be grooved and in the long run it will be a spec tire like HPI x-pattern. Dish wheels is not allowed.

Now i was wondering what power the EZrun 9T produces.

Is it equal to a 13.5T sensored or is it way faster? the average 13.5T produces 230 watts according to factory specs from 10 manufacturers.

The meaning about this two options is that if you want to go serious in this class and want the fastest motor then you are stuck with the 9T witch is cheap.

Now some people like me gets their hand on cheaper used or even not used sensored 13.5T motors. so thats all cool, the problem starts when there is one guy with the badest esc with the badest motor.

Will he keep up with the 9T EZrun?

any other gains he might have?
Quote:
Originally Posted by MatsNorway View Post
So no one knows have a EZrun 9T is against a 13.5T?
If you take a 13.5 and use the latest and greatest ESC, it is going to be nearly as fast as a modified motor.

The rules are a little unclear to me. Is there a motor limit or is it open to any wind? Or is the rule that you can choose either of these two motors? Or do you simply want to know which of these two is faster?
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Old 03-15-2010, 09:32 AM   #4
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Both.

You can race the EZrun 9 turn sensorless Or any 13.5 turn sensored.

Will a Top notch 13.5T keep up with the EZrun 9T?

gotta go 17.5T if so then.
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Old 03-15-2010, 09:36 AM   #5
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Hi
At our local club we race 1/12th scale on a track 20m * 12m.
We allow 10.5 turn /any controller with lipo or the ezrun 9t motor/speed control combo. There is a small difference in speed , the 9 turn has the edge. Works well as beginners have to spend very little to be competitive.
Hope this helps
Peter
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Old 03-15-2010, 09:56 AM   #6
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good stuff. Thanks.

Only one problem.

The power is not going up evenly on motors when you turn up the volt.

The 9T could easly get less power than 10.5T att higher volts.

But again 13.5T will not don`t you think?
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