R/C Tech Forums

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

Thread Tools Search this Thread
Old 03-12-2007, 09:28 AM   #1
Tech Adept
Join Date: Dec 2006
Posts: 102
Default Gearing Question

Hello everyone, got a quick question about gearing... I am using an Epic Stock 27t motor and I was wondering abiout something...If I increase RPM how should I adjust my gearing. Should I go with a larger or smaller pinion. I am running a TC4 on oval. Thanks in advance Jeff
jeffbhhs is offline   Reply With Quote
Old 05-28-2008, 02:54 PM   #2
Tech Rookie
Join Date: May 2008
Posts: 5

what i have been told is to get more speed go with a higher teeth count but going higer will increase motor temp.
pacteam07 is offline   Reply With Quote
Old 06-12-2008, 02:22 PM   #3
Tech Master
RC Dad's Avatar
Join Date: Jun 2007
Location: Bismarck
Posts: 1,355
Trader Rating: 26 (100%+)
Send a message via MSN to RC Dad

If you have tweaked the motor for more RPMs but had adequate top end before doing then you should go lower on your pinion. You will achieve the same speed just with more RPMs. If you needed the RPMs to get more speed, then I wouldn't change gearing at all.
GV2 Pro, XXX4G+, Blitz SCT, CRC GenXL
RC Dad is offline   Reply With Quote
Old 06-12-2008, 05:26 PM   #4
Tech Elite
edseb's Avatar
Join Date: Jan 2004
Location: Laguna Niguel, California
Posts: 2,421

Originally Posted by pacteam07 View Post
what i have been told is to get more speed go with a higher teeth count but going higer will increase motor temp.
No-not really-well it isn't that simple, increasing the rpm at the motor (increasing rpm is usually done by different brushes, the way they are cut or springs) means you compromised by losing torque (there is always a tradeoff), so it will not be able to pull out of the corners the same, but with the same gearing you will be at a higher rpm and faster on the top end. So you can drop a tooth and regain out of corner speed and still end up near the same top speed since the motor will generate more rpm to compensate. Or leave the same gearing, lose the out of corner aceleration and gain top speed. This works to a point- you still have to worry about load and how hot and inefficient the motor is getting, but in general you will have a starting point.
RC Car Action Editor and Photographer
Carl Hyndman
edseb is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
XXX-S Gearing Question TeamPink91 Electric On-Road 7 05-15-2010 09:55 PM
AE 12L gearing question. MrZero Georgia Racing 4 11-06-2007 10:42 AM
Gearing question Sal Amato Electric On-Road 1 09-09-2006 01:01 PM
T3 Gearing Question DraKhen99 Electric Off-Road 2 07-18-2003 08:36 AM
Another gearing question Elk666 Electric On-Road 6 05-02-2003 09:50 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 10:26 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