Go Back   RCCrawler Forums > Scale Rigs Brand Specific Tech > Axial Brand Scale Rock Crawlers > Axial SCX-10
Loading

Notices

Thread: SCX speed question

Reply
 
LinkBack Thread Tools Display Modes
Old 12-16-2013, 02:25 PM   #1
Quarry Creeper
 
Join Date: Dec 2009
Location: Brackenfell, South Africa
Posts: 448
Default SCX speed question

Here's a quick question for you guys...

I replaced the motor and ESC, in my dingo, from a Tazer 10 turn LIPO Sade ESC with drag brake and a 550 stock motor, too a Hobbywing Juststock 21.5 sensored brushless system.

Still running the standard spur/pinion gears, but my wheel speed has dropped. The brushless system is 3s compatable. So my question is, which avenue to pursue?

Pinion/spur change, or 3s conversion.

I was happy with the old speed, but I am worried about the speed increase with 3s...

Please help...
Louisbaby is offline   Reply With Quote
Sponsored Links
Old 12-16-2013, 03:48 PM   #2
RCC Addict
 
Join Date: Jul 2013
Location: Planet Earth
Posts: 1,286
Default Re: SCX speed question

going up on the pinion will give you more speed ...Maybe try a 23/24 tooth pinion..just watch your temps.

I cant say what is good gearing with a 3s but someone will im sure.

Last edited by 6sharky9; 12-16-2013 at 03:50 PM.
6sharky9 is offline   Reply With Quote
Old 12-16-2013, 10:27 PM   #3
Newbie
 
Join Date: Dec 2012
Location: Edmonton, Canada
Posts: 25
Default Re: SCX speed question

Increasing voltage allows you to retain low speed control and still have a bit more speed. Probably would be the best from a pure performance viewpoint. If you have an investment in 2S batteries already then play around with the gearing, it is unlikely you will stress a 21 turn brushless no matter what the gearing on an scx10, but as sharky says, monitor temps.
cruuk is offline   Reply With Quote
Old 12-17-2013, 11:52 AM   #4
Quarry Creeper
 
Join Date: Dec 2009
Location: Brackenfell, South Africa
Posts: 448
Default Re: SCX speed question

Thanks for the advice guys...

I found a solution. I recently bought another SCX10 honcho, and today I decided to strip it down and rebuild it. I was looking over the parts, and found the spur/pinion in the new SCX10 to be 80/23. So I opened the Dingo, and checked the spur/pinion in the Dingo. To my surprise, I found it to be 87/13. Now I understand my wheel speed problem. Simple solution, swapped spur/pin ions over and my wheel speed is much better...
Louisbaby is offline   Reply With Quote
Old 12-17-2013, 11:54 AM   #5
RCC Addict
 
Join Date: Jul 2013
Location: Planet Earth
Posts: 1,286
Default Re: SCX speed question

Hmmmm..I guess only the RTR models come with 87/20 gearing...Shrugs*
6sharky9 is offline   Reply With Quote
Old 12-17-2013, 11:59 AM   #6
RCC Addict
 
Join Date: Jul 2013
Location: Planet Earth
Posts: 1,286
Default Re: SCX speed question

You have a lot more speed possible going higher than a 13 Tooth.

I would try a 16T..would be night and day difference and still have plenty of torque.

Again; just watch motor temps

If for any reason you find yourself breaking spur gears you may want to consider moving to 32 pitch gears instead of the 48P.

Last edited by 6sharky9; 12-17-2013 at 12:07 PM.
6sharky9 is offline   Reply With Quote
Old 12-17-2013, 12:37 PM   #7
Quarry Creeper
 
Join Date: Dec 2009
Location: Brackenfell, South Africa
Posts: 448
Default Re: SCX speed question

Thanks dude

Basically, what I did was install the 80 tooth spur and 23 tooth pinion into my Dingo, with the 21.5 turn brushless, 1600KV @ 8.4 volts, and she's back to more or less the same speed it was before.

81/23 = 27.09
87/13 = 51.48

So you can see the difference between the 2 different final drive ratios.
Louisbaby is offline   Reply With Quote
Old 12-17-2013, 12:41 PM   #8
Quarry Creeper
 
Join Date: Dec 2009
Location: Brackenfell, South Africa
Posts: 448
Default Re: SCX speed question

Oh, and the 550 can claims 20 000 rpm @ 12 volts, so I'm assuming @ 8.4 volts it would be around 14 000 rpm. More or less the same...
Louisbaby is offline   Reply With Quote
Old 12-17-2013, 12:45 PM   #9
RCC Addict
 
Join Date: Jul 2013
Location: Planet Earth
Posts: 1,286
Default Re: SCX speed question

Just watch your temps especially under load such as crawling and full speed blasts..You want a compromise of speed and torque basicly...to far either way isn't really a good compromise.

But if doesn't get hot and you like it then that's what you should keep it at.
6sharky9 is offline   Reply With Quote
Old 12-17-2013, 12:45 PM   #10
Quarry Creeper
 
Join Date: Dec 2009
Location: Brackenfell, South Africa
Posts: 448
Default Re: SCX speed question

Oh and lastly, I installed my telemetry temp sensor into the Dingo, what temp should the motor get too?
Louisbaby is offline   Reply With Quote
Old 12-17-2013, 02:09 PM   #11
RCC Addict
 
Join Date: Jul 2013
Location: Planet Earth
Posts: 1,286
Default Re: SCX speed question

Quote:
Originally Posted by Louisbaby View Post
Oh and lastly, I installed my telemetry temp sensor into the Dingo, what temp should the motor get too?
I would try to stay in the 130-135 range maximum for brushless..you can maybe go higher but heat is a killer of motors.

I guess this technique applies as well for brushless...If you can put your finger on the motor after running out a pack and hold it there for 5 seconds without needing to take your finger off because its too hot then your ok.

If you cant then it may be getting too hot
6sharky9 is offline   Reply With Quote
Old 12-17-2013, 06:36 PM   #12
I wanna be Dave
 
Join Date: Jan 2009
Location: New Port Richey, FL.
Posts: 2,545
Default Re: SCX speed question

You can go to 170* on brushless. 80/23 is a lot of gear for crawling...unless you want more top end.
Johnnysplits is offline   Reply With Quote
Old 12-21-2013, 03:20 PM   #13
Quarry Creeper
 
Join Date: Dec 2009
Location: Brackenfell, South Africa
Posts: 448
Default Re: SCX speed question

We ran the trucks on Friday, and she ran perfect. I agree with you on the gearing being a bit high, but for now it's fine. Next time I'm at my local hobby shop I'll pick up a 20 tooth pinion...
Louisbaby is offline   Reply With Quote
Reply



SCX speed question - Similar Threads
Thread Thread Starter Forum Replies Last Post
Tamiya 3 speed tranny in a scx-10 balln Axial SCX-10 3 09-25-2015 01:46 PM
gearing for a scx 10 with a rc4wd 2 speed m1009cucv Axial SCX-10 7 01-02-2014 10:35 PM
rc4wd 2 speed into a scx 10 m1009cucv Axial SCX-10 16 07-12-2013 09:00 PM
SCX 2 speed, should Axial make one? TrailDawg362 Axial SCX-10 29 12-04-2010 10:39 PM
SCX-10 RTR/TR Speed Control Question Banshee800 Axial SCX-10 10 11-28-2009 07:07 AM
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 12:35 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.
Copyright 2004-2014 RCCrawler.com