R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 04-01-2009, 09:00 PM   #1
Tech Elite
 
hacker's Avatar
 
Join Date: Mar 2009
Location: Vic, Australia
Posts: 3,136
Trader Rating: 141 (100%+)
Default traction roll......help

having problems with traction roll on my 4wd. Suspension set up bit soft, oils seem thin. Thats my initial observation as this was bought 2nd hand the other day. Rear sway bar.

What direction would I need to go in order to reduce traction roll?

I'm thinking hardening the shocks, but dont want to make too much of a compromise for the rough stuff. Front sway bar perhaps? Track is hard packed clay, heaps of traction.
hacker is offline   Reply With Quote
Old 04-01-2009, 10:15 PM   #2
Tech Master
 
JeromeK99's Avatar
 
Join Date: Jun 2008
Location: Loma Linda, CA - USA
Posts: 1,137
Trader Rating: 3 (100%+)
Default

Could be tires... How are the foams in them? Tire roll could cause the problem.


Jerome
JeromeK99 is offline   Reply With Quote
Old 04-01-2009, 10:21 PM   #3
Tech Addict
 
carbon madness's Avatar
 
Join Date: Nov 2005
Location: Northwestern, Indiana
Posts: 653
Trader Rating: 2 (100%+)
Default

Not sure where you are from or if you are racing indoors or not, but normaly when the traction is high you want things to be a little stiffer. It could be like said that a stiffer foam in the tires could help out, to maybe the shocks need a stiffer package. Being that you did buy it used the other owner might have been on a low grip surfface, or it could have been really bumpy and that is why it has a softer set-up on it.
__________________
マイクル ユージャック 

*Team CFX Racing**Evil 3 Paint Works*
carbon madness is offline   Reply With Quote
Old 04-02-2009, 02:03 AM   #4
Tech Elite
 
hacker's Avatar
 
Join Date: Mar 2009
Location: Vic, Australia
Posts: 3,136
Trader Rating: 141 (100%+)
Default

I never thought of the foam to be honest. I usually use the foams that come with the tyres.

I race outdoors. I'll stiffen everything up and see how it goes the next couple days.
hacker is offline   Reply With Quote
Old 04-02-2009, 10:23 AM   #5
Tech Prophet
 
Casper's Avatar
 
Join Date: Aug 2004
Location: Orange, Ca
Posts: 17,763
Trader Rating: 34 (100%+)
Default

You can add some limiters to the shocks to reduce chassis roll will help with traction rolling as well.
__________________
TLR/Losi Team Driver
TLR/Losi | Tekin | DE Racing | Spektrum | Exotek | JBRL | Kolor Koncepts | OC/RC |Sticky Kicks | Imagine It Graphics | Casper-RC.com
TLR 22 4.0 SR, TLR 22T 4.0, TLR 22-4 2.0, Spektrum DX6R

WWW.CASPER-RC.COM TLR and Tekin setups
Casper is offline   Reply With Quote
Old 04-02-2009, 10:27 AM   #6
Tech Regular
 
Join Date: Nov 2008
Location: Ontario, Canada
Posts: 475
Trader Rating: 1 (100%+)
Default

You could also try cutting off the outside pins on the front tires or lowering the front end or lowering both front and back, just depends on your track.

If your track is really bumpy don't stiffen the shocks too much.
CraigV is offline   Reply With Quote
Old 04-02-2009, 10:46 AM   #7
Tech Regular
 
Join Date: Dec 2008
Location: Edmonds, AZ
Posts: 287
Trader Rating: 9 (100%+)
Default

I will occasionally have traction roll issues with my XXX-4.

The suspension is pretty stiff too.
__________________
Race:
Hyper 10 SC
SC10
XXX-T - Stock Truck
XXX4+g
Toddzilla is offline   Reply With Quote
Old 04-02-2009, 10:59 AM   #8
Suspended
 
Join Date: Mar 2009
Posts: 481
Default

Quote:
Originally Posted by hacker View Post
having problems with traction roll on my 4wd. Suspension set up bit soft, oils seem thin. Thats my initial observation as this was bought 2nd hand the other day. Rear sway bar.

What direction would I need to go in order to reduce traction roll?

I'm thinking hardening the shocks, but dont want to make too much of a compromise for the rough stuff. Front sway bar perhaps? Track is hard packed clay, heaps of traction.
One way or another finding a setup that works is always some kind of compromise. Trick is to find the best "compromise" that works for you on the track you are running. Using softer springs and lighter weight oils is really better utilized on really rough tracks, so the smoother the surface and the better the traction the harder and heavier you can go to help keep the chassis level through the corners.
Other thing you might try is different swaybar combinations. I notice you only mention the rear one, do you know that gives you more steering. Using a front one would increase your rear traction and may keep the rear end from washing out so easily and getting to the point of tractionrolling. Hard to say, but its something worth trying.
You also might check what tires the local fast guys are running. Most tracks have a "trick" tire everyone is running.
Lightin' is offline   Reply With Quote
Old 04-02-2009, 11:41 AM   #9
Tech Master
 
Join Date: Oct 2005
Posts: 1,352
Trader Rating: 58 (100%+)
Default

Lots of good suggestions here. The only one I didn't see was try just a touch (1*) more of neg. camber. Sometimes thats enough to help, but all the other adjustments should be considered.
__________________
Where ever I may roam
Bigcheese is offline   Reply With Quote
Old 04-03-2009, 05:36 PM   #10
Tech Elite
 
hacker's Avatar
 
Join Date: Mar 2009
Location: Vic, Australia
Posts: 3,136
Trader Rating: 141 (100%+)
Default

thanks for the suggestions guys. Will work on the setup over the weekend.

Bigcheese, can you elaborate on how - camber would help?
I thought -camber would give more grip, hence more chassis roll. That my initial thought anyway, which in most cases is wrong
hacker is offline   Reply With Quote
Old 04-03-2009, 06:46 PM   #11
Tech Master
 
Join Date: Oct 2005
Posts: 1,352
Trader Rating: 58 (100%+)
Default

CraigV hit on it with trimming the outside row of knobs off. As the car rolls the tires flex under enough to grab 'causing well, traction roll. Sometimes another degree in neg. camber keeps the tires from digging in. A controlled slide is prefered. Actual rotation of the car is more prefered.
__________________
Where ever I may roam
Bigcheese is offline   Reply With Quote
Old 04-03-2009, 07:02 PM   #12
Suspended
 
Join Date: Mar 2009
Posts: 481
Default

Quote:
Originally Posted by hacker View Post
thanks for the suggestions guys. Will work on the setup over the weekend.

Bigcheese, can you elaborate on how - camber would help?
I thought -camber would give more grip, hence more chassis roll. That my initial thought anyway, which in most cases is wrong
You are correct. Negative camber helps the tire ride on its contact patch under heavy cornering, instead of rolling over on the sidewall.
Lightin' is offline   Reply With Quote
Old 04-03-2009, 07:34 PM   #13
Tech Lord
 
20 SMOKE's Avatar
 
Join Date: Dec 2003
Location: HVR_ WEEKI WACHEE FL
Posts: 10,299
Trader Rating: 101 (100%+)
Default

Hacker, read through this it will help what every one is saying
http://users.telenet.be/elvo/
__________________
Jamie W
*Team Tekin*Tekno-rc*DE Racing*AKA*DDHRC*
20 SMOKE is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tamiya mini cooper sipaboy Electric On-Road 29687 12-10-2017 04:07 AM
Team Losi JRXS Type-R Andrew Gray Electric On-Road 13454 07-11-2017 08:26 PM
CRC Battle Axe, GenXPro 10, 1/10th pan, Brushless, Lipo,4c, Road, Oval,TipsandTricks John Stranahan Electric On-Road 1776 03-01-2016 01:18 PM
Does TT-01 has a potential? Blackwrench™ Rookie Zone 343 10-25-2013 08:31 AM
Traction Roll ? gansei Nitro On-Road 75 10-12-2012 12:38 AM
Serpent 710 Ron C. Nitro On-Road 23347 03-16-2010 02:47 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 06:42 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