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04-30-2010, 07:42 AM
| #1 |
| Newbie Join Date: Apr 2010 Location: Canada
Posts: 14
|  18.5 or 21.5
After trying a few cheaper options I hace decided to go for the Nvak Goat 3s system. I use my LCC more in the yard than any serious climbing - 21.5 or 18.5? First brushless Thanks |
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04-30-2010, 08:34 AM
| #2 |
| RCC Addict Join Date: Jan 2009 Location: O.C
Posts: 1,215
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I would go with the 18.5 to get a little more wheel speed. You can always gear down if needed + use your dig if you get stuck.
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04-30-2010, 08:44 AM
| #3 |
| I wanna be Dave Join Date: Dec 2008 Location: Madrid, IA
Posts: 2,015
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since those are ballistic motors with the 14mm rotor go with the 18.5t and the 21.5 will have no wheel speed
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04-30-2010, 12:07 PM
| #4 |
| Rock Stacker Join Date: Apr 2010 Location: Portland/Vancouver
Posts: 77
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Ummmm, 18.5, 21.5? Ford, Chevy? Revo, Savage? Both are really good Motors, and will work fine for your situation....I bet you'll be happy with either one.  |
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04-30-2010, 12:15 PM
| #5 |
| Newbie Join Date: Dec 2009 Location: Northwest
Posts: 18
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I'm using the Tekin 21.5 and I believe a 14T right now and it has plenty of wheel speed and good power. You can't go wrong with either.
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04-30-2010, 09:58 PM
| #6 |
| Newbie  Join Date: Mar 2009 Location: sacramento
Posts: 12
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I have an ballistic 18.5t with a 13t pinion and very happy with it> Seems to work really well.
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05-01-2010, 10:44 AM
| #7 |
| Newbie Join Date: Apr 2010 Location: Chemainus BC Canada
Posts: 5
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I'm running the goat 3s with the ballistic 21.5 with a 16t pinion, the wheel speed is just on the verge of to slow for drops and ledges but its working I think i need to go to an 18, but it has all the torq needed, I think if i did it again I would go with the 18.5
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05-01-2010, 10:59 AM
| #8 |
| Rock Stacker Join Date: Oct 2009 Location: SoCal
Posts: 80
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I have the ballistic 21.5 goat 3s combo, and it packs enough wheel speed for me and all the torque in the world and thats with a 13t pinion. I havn't had a chance to play with gearing yet since shes only a few runs old but after an entire pack the motor is barely even noticeably warm and the esc feels like it was barely used.
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05-01-2010, 11:20 AM
| #9 |
| Newbie Join Date: Jul 2008 Location: Grand Rapids, MI
Posts: 46
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it comes down to your battery choice.......less volts(7.4) needs faster motor(18.5)......more volts(11.1) slower motor(21.5) Then fine tune to driving style with gearing.
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05-03-2010, 07:25 PM
| #10 |
| RCC Addict Join Date: Aug 2009 Location: Earth?
Posts: 1,698
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Ive used both on 3s Lipo. I burned the 21.5 motor by gearing it up so much trying to get wheel speed out of it. The 18.5 with a 13T pinion is the real deal.
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05-03-2010, 07:33 PM
| #11 |
| RCC Addict Join Date: Jul 2009 Location: Reno, Nv
Posts: 1,964
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I am running a 21.5 Tekin on 3s with a 15t and it has enough wheel speed to flip it back on to its wheels most of the time with a grappler pro body and plenty everywhere else.
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05-03-2010, 08:20 PM
| #12 |
| Newbie Join Date: Apr 2010 Location: Missoula, MT
Posts: 23
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I just yesterday ran my first comp with my LCC running a goat 3s 18.5 with a 13T on a lipo 3S. I am happy
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05-03-2010, 10:21 PM
| #13 |
| Quarry Creeper Join Date: Aug 2008 Location: 5280'
Posts: 231
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18.5 with a 12t pinion works great for me  also the new worms would kick the speed up!  |
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05-03-2010, 11:10 PM
| #14 |
| Newbie Join Date: Apr 2010 Location: Denver
Posts: 34
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Got a 17.5 with a 12t. The same motor with a 13t ran hot. My current wheelspeed is fine.
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05-05-2010, 08:07 AM
| #15 |
| Newbie Join Date: Mar 2010 Location: Cantaffordtes, WA
Posts: 46
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I have a 21.5, 15t, goat 3s, and parallel 1000's. It seems fine to me, better than when I got it because it had a 17t.
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05-06-2010, 01:24 PM
| #16 |
| RCC Addict Join Date: Oct 2009 Location: In the thinking chair
Posts: 991
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I run a tekin 21.5, 14t, on 3s and have good wheel speed. But if your running around the yard you probably want more speed than torque.
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05-06-2010, 01:48 PM
| #17 |
| RCC Addict Join Date: Jul 2009 Location: reelsville
Posts: 1,871
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The guys commenting that they have plenty wheelspeed with the Tekin 21.5 need to realize that it's a faster motor than the ballistic 18.5 and way faster than a ballistic 21.5 Ballistic 21.5 1350KV Ballistic 18.5: 1650KV Tekin 21.5 and silver novak 21.5: 1800KV Tekin 17.5: 2200KV silver novak 18.5: 2700 KV 14mm rotors slow the Tekin's to the Ballistic speeds and 12.3mm rotors speed up the ballistic's to silver can/Tekin speeds. 13mm rotors break the difference but I've never saw KV's listed anywhere. If anybody has a chart that list the different KV's for all the stator/rotor combo's out there I'd love to see it. |
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05-06-2010, 05:42 PM
| #18 | |
| RCC Addict Join Date: Jul 2009 Location: Reno, Nv
Posts: 1,964
| Quote:
I had no idea that the rotor made a difference and it looks like a big difference.
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