R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 08-06-2010, 04:20 PM   #1
Tech Apprentice
 
Join Date: Jun 2010
Location: SC
Posts: 54
Trader Rating: 2 (100%+)
Default Brushless gearing help

I know this topic probably comes up all the time, but I've searched around and I find conflicting info everywhere, so here is the scoop:

I have an associated TC5 (IR of 2) that I race on a smaller cement track with a 13.5t brushless motor. It currently has 64 pitch gearing, but I'd like to go to 48 pitch since the track I race at tends to have some debris.

Right now it has a 118 spur, and 33 pinion which gives a FDR of 7.15ish. The car seems to be low in top speed compared to the other 13.5 cars.

Any tips for a good starting point for a 48 pitch? I was thinking 85 spur, 24 pinion? (FDR 7.08) Any tips/help would be really appreciated!
CodeToad is offline   Reply With Quote
Old 08-06-2010, 04:44 PM   #2
Tech Master
 
locked's Avatar
 
Join Date: Mar 2010
Location: Toronto
Posts: 1,758
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by CodeToad View Post
I know this topic probably comes up all the time, but I've searched around and I find conflicting info everywhere, so here is the scoop:

I have an associated TC5 (IR of 2) that I race on a smaller cement track with a 13.5t brushless motor. It currently has 64 pitch gearing, but I'd like to go to 48 pitch since the track I race at tends to have some debris.

Right now it has a 118 spur, and 33 pinion which gives a FDR of 7.15ish. The car seems to be low in top speed compared to the other 13.5 cars.

Any tips for a good starting point for a 48 pitch? I was thinking 85 spur, 24 pinion? (FDR 7.08) Any tips/help would be really appreciated!
FDR of around 7 should be pretty good for a 13.5 with a large amount of timing advance. If you aren't running much timing you could probably go a bit lower.

I run on an asphalt track with over a 100 foot (30 + meter) straight and my FDR is 6.9. I have one of the fastest cars on the straight. I'm using a Tekin RS Pro running vegas 208 and a BOSS (Speed Passion v3) 13.5 motor.

My ESC settings are currently:

Timing boost: 52
RPM range: 3xxx-17xxx
Turbo: 11
Ramp: 2
Delay: .2

My motor is barely even warm after a 6 minute race, so I could probably boost it even more or drop a tooth on the pinion, but it has plenty of speed as is. My settings would probably cook some motors, but my BOSS motor just laughs at it.

How hot is your motor getting right now? what motor and speedo are you using?
__________________
Dave Locke
Team PerformanceHobbies.ca | ORCA RC | Bodies by Brandon | Team Meeting
XRAY T4'15 x2 | XRAY XB4 | XRAY XB8E | XRAY XB8
locked is offline   Reply With Quote
Old 08-06-2010, 07:54 PM   #3
Tech Apprentice
 
Join Date: Jun 2010
Location: SC
Posts: 54
Trader Rating: 2 (100%+)
Default

Thanks. I'm running a Fantom DUO 13.5 with a MMP ESC. So far I did not add any timing advance, but the motor was very cool (~120 after a 5 min qualy) so I think I can safely add some.
CodeToad is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
sc10 going brushless need help fmx623 Electric Off-Road 21 02-05-2010 09:58 AM
1:12 Scale Brushless Gearing or Rollout? Decathalon Electric On-Road 6 05-29-2006 04:48 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 04:26 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net