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Old 02-19-2008, 04:06 PM   #16
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Default I must be missing something

I must be missing something or misunderstand the different requirements of
Brushed and brushless.

From the charts and recomendations I have seen a 19 turn on my TC should have a FDR of between 7 and 8.
The Novak chart says I should run the 13.5 at 4.5

If the 19 turn and 13.5 are roughly equivalent then that is a pretty dramatic difference in gearing.
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Old 02-19-2008, 04:43 PM   #17
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I've been running my 13.5 w/13mm rotor at 4.9...plenty of punch and speed. The temp stays pretty low. I don't have a temp quage, but I can leave my finger on it comfortably after a 6min run.--Al
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Old 02-19-2008, 04:53 PM   #18
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it is roughly equivalent in speed, not in gearing!

The power bands between a brushed and brushless motor are just different and being as such, you must gear differently between the two of them.
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Old 02-19-2008, 05:01 PM   #19
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Quote:
Originally Posted by imjonah View Post
If the 19 turn and 13.5 are roughly equivalent then that is a pretty dramatic difference in gearing.
No, it is the 10.5 and 19t that are roughly equivalent.
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Old 02-19-2008, 05:01 PM   #20
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it is roughly equivalent in speed, not in gearing!

The power bands between a brushed and brushless motor are just different and being as such, you must gear differently between the two of them.
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Old 02-19-2008, 05:45 PM   #21
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Default FDR

Soundslike the car manufactures need to find a way to lower the internal ratios in the cars to make these FDR even possible. We are going to have to get the internals down to 1.5 or less to not have to have 50-60 tooth pinions. Right now in my TC5 with a 13.5 I am running a 100/40 for a 5.0 FDR. And that was a pretty smooth gear.

If the internal was less than 2.0 maybe a 1.6 than my FDR would be 4.0.

Time to make those center pulleys a little bit bigger.

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Old 02-19-2008, 06:18 PM   #22
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call me crazy but the gearing they list for a 17.5 in 1/12 is way under what we are running here for gearing. in my car right now im rolling out at a 81mm. and my motor is comming off the track at around 125 degrees. and im staying with the brushed stock motors just fine.
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