R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 05-16-2008, 09:06 AM   #1
Tech Addict
 
tenpins77's Avatar
 
Join Date: Jun 2007
Location: in a house
Posts: 692
Trader Rating: 7 (100%+)
Send a message via AIM to tenpins77
Default zoom zoom, wizz wizz go the gears

Hey all,

Im really loosing sleep at night trying to figure out how to gear my B4, i have heard anywhere from advanced algebra calculations, to just run stock gearing? However what confuses me is, why use a 81 82 84 spur gear, when you could run lets say an 81 with a 20 tooth pinion, or an 84 spur with a 23tooth pinion. I have a FTB4 and a 12x2 mod checkpoint motor. Here and there i will put a money 19turn in, and run an 84 spur and a 24 or 25tooth pinion? But how do we know what our maximum gearing or minimium gearing should be? Can i run an 84tooth spur gear and a 23 or 24tooth pinion without overheating? or over gearing? Of im im looking for more punch off the line run an 84 with a 22, or even change to an 81 and run a 22! Just seems so confusing.

thanks for any advice,

tim
tenpins77 is offline   Reply With Quote
Old 05-16-2008, 09:42 AM   #2
Tech Champion
 
BuggyKing's Avatar
 
Join Date: Oct 2006
Location: Huntington Beach, Ca
Posts: 7,919
Trader Rating: 17 (100%+)
Default

Well it depends on the track for gearing. Bashin not so much. Basically just practice and see wat feels comfortable. U want enuf gear to get u done the straights but not top out mid track etc. Gearing also depends on wat motors u run. Like u have ur high RPM motor which u can take out gearing and then u have high torque which u can gear up.And if ur gearing is off meaning geared to low or to high then motor runs real hot. But that is something that u will ultimately need to play around with.
__________________
Our government is a #$%$ joke, from the head jester on down
RIP Mike M
BuggyKing is offline   Reply With Quote
Old 05-16-2008, 09:47 AM   #3
Tech Addict
 
tenpins77's Avatar
 
Join Date: Jun 2007
Location: in a house
Posts: 692
Trader Rating: 7 (100%+)
Send a message via AIM to tenpins77
Default

well its a checkpoint 12x2 and then my occasional 19 turn
tenpins77 is offline   Reply With Quote
Old 05-16-2008, 10:32 AM   #4
Tech Master
 
Join Date: Sep 2007
Posts: 1,644
Trader Rating: 67 (100%+)
Default

Long straights and high speed sections = larger pinion for more high speed. Lots of turns, jumps =small pinion to accelerate faster.
nutz4rcyktw is offline   Reply With Quote
Old 05-16-2008, 11:02 AM   #5
Tech Elite
 
RCHR's Avatar
 
Join Date: Mar 2008
Posts: 2,490
Default

Racers use the different size spur gears to move the weight of the heavy motor forward or back to change the handling of the car more than to change gear ratios.

If your looking to change the low end power or top end speed, just changing pinions gears should get you the results you want.
__________________
Radio Control Hobbies & Raceway
1258 South Main Street, Waterbury, CT. 06706
203-575-9757 / www.rchr.biz / [email protected]
RCHR is offline   Reply With Quote
Old 05-27-2008, 09:53 PM   #6
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
Default

I run my B4 with a 23T pinion on stock spur with a Reedy Quadmag 19T. It works on almost all tracks and motor temp is usually 130-140F after a 5 minute race. If its hotter than that, the comm usually needs cleaning/cutting.

For a 12x2 I'd drop to a 19 or 20T pinion depending on your track.
RC Dad is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ep-100 (mini-zoom) with spektrum dx7 chris72983 R/C Items: For Sale/Trade 0 10-28-2007 06:47 PM
WTB: Digital Camera Zoom Lens HotrodHopkins Other Items: For Sale/Trade or Wanted to Buy 1 07-21-2007 07:06 AM
FS:MAZDA6 ZOOM-ZOOM JoeyE R/C Items: For Sale/Trade 4 11-08-2006 10:16 AM
minolta 5.0 meg 7x zoom camera digital HOTROD120 Other Items: For Sale/Trade or Wanted to Buy 2 10-06-2006 03:16 PM
anyone know where sell hpi spare parts besides zoom? huasze Singapore R/C Racers 147 04-29-2002 08:56 PM



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 10:22 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