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Pinion Gear Help ASAP!!! Don't know which to get!

Pinion Gear Help ASAP!!! Don't know which to get!

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Old 08-15-2010, 11:26 AM
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Default Pinion Gear Help ASAP!!! Don't know which to get!

Hey Guys,

Just ordered TRF201, and I need help selecting a good pinion gear. I'm going to be running 17.5T Navok Brushless System, and I need help picking up which gear to run. I waiting the one that will keep the motor the coolest.

Here are the ones I'm looking at:

Pinion Gear 48P 23T
Pinion Gear 48P 25T
Pinion Gear 48P 27T

I want to place my order soon so a quick answer would be appreciated? Also does anyone know when I can look for a chart that would be a better guide?

Thanks
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Old 08-15-2010, 12:37 PM
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Use this gearing calculator and enter in everything except the pinion size. The calculator will then solve what pinion size you need to accomplish the speed and gearing you entered.

http://www.scriptasylum.com/rc_speed/_solver.html
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Old 08-15-2010, 12:59 PM
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Originally Posted by simplechamp View Post
Use this gearing calculator and enter in everything except the pinion size. The calculator will then solve what pinion size you need to accomplish the speed and gearing you entered.

http://www.scriptasylum.com/rc_speed/_solver.html
How do I figure out the transmission ratio for the TRF201?

Thanks
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Old 08-15-2010, 01:00 PM
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Should be able to track it down online.

EDIT: It's 2.6:1, so enter 2.6 in the field

If you use 2S lipo then for the battery select 2 cells and ~3.7V/cell, and the stock included spur is 79T. You can find the kv rating of your motor on Novak's website.
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Old 08-15-2010, 01:02 PM
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Originally Posted by simplechamp View Post
Should be able to track it down online.
Been looking for the last 20 minutes . . . its the only calculation I don't have!

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Old 08-15-2010, 01:09 PM
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OK well then all you need is the 2.6 and you should be good, just remember to use 3.7V/cell for voltage per cell.
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Old 08-15-2010, 01:12 PM
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Originally Posted by simplechamp View Post
OK well then all you need is the 2.6 and you should be good, just remember to use 3.7V/cell for voltage per cell.
Thank you so much!

One last question, very lated, The Novak 21.5T is the same price as the 8.5T, which system would be recommend for a beginner to intermidate. I want something that will give me plenty of run but will also be fast.

I'm thinking the 17.5T would be a good balance between speed and battery life.

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Old 08-15-2010, 01:40 PM
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I can't really make a recommendation since I don't drive 2WD 1/10 buggy but I would guess a 17.5 or 13.5 would be fine.
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Old 08-15-2010, 02:05 PM
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I would pick up a range of pinion sizes in case you switch out motors, go to different tracks, etc...
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