Go Back  R/C Tech Forums > General Forums > Electric Off-Road
Tune With Camber Links >

Tune With Camber Links

Community
Wiki Posts
Search
Like Tree65Likes

Tune With Camber Links

Thread Tools
 
Search this Thread
 
Old 07-12-2011 | 01:46 PM
  #271  
MantisWorx's Avatar
Tech Champion
iTrader: (28)
 
Joined: Jun 2010
Posts: 5,955
Default

you dont want them to move at all left to right and be free as possible up and down.
MantisWorx is offline  
Old 07-12-2011 | 01:49 PM
  #272  
Tech Elite
iTrader: (1)
 
Joined: Mar 2011
Posts: 2,766
From: Houston
Default

^Yep. It's best not to have any if you can get away with it. Sometimes you can't.
fredswain is offline  
Old 07-12-2011 | 01:52 PM
  #273  
larlev's Avatar
Tech Master
iTrader: (4)
 
Joined: Apr 2011
Posts: 1,533
From: Austin, Tx.
Default

Thanks...I have been told they should move freely. I kept thinking about that for awhile now. Have had it wrong all along
larlev is offline  
Old 07-12-2011 | 01:59 PM
  #274  
MantisWorx's Avatar
Tech Champion
iTrader: (28)
 
Joined: Jun 2010
Posts: 5,955
Default

Originally Posted by fredswain
^Yep. It's best not to have any if you can get away with it. Sometimes you can't.

i always run one in the rear at MM and none at mikes. 4w buggies tend to better with at least the rear on one, dont really know why
MantisWorx is offline  
Old 07-12-2011 | 02:01 PM
  #275  
larlev's Avatar
Tech Master
iTrader: (4)
 
Joined: Apr 2011
Posts: 1,533
From: Austin, Tx.
Default

Wonder why people swear they should be loose side to side? Isn't having too much play like having none at all?
larlev is offline  
Old 07-12-2011 | 02:19 PM
  #276  
Tech Champion
 
Joined: Oct 2007
Posts: 7,342
Default

Talking about weight transfer is always tricky, as it can be somewhat counterintuitive.

When one reduces the roll stiffness on a given end of the car, that end, and thus the entire chassis, tends to roll/lean more. Many times this will be described as increased weight transfer (change in vertical forces on the tires). But in reality it is less, due to the reduced roll stiffness the other end of the car is taking more of the roll loads.

Roll forces on a given end won't be higher with less roll stiffness, they will be lower. The other end of the car sees the higher roll loads/weight transfer, as that roll stiffness has not changed, but is now a larger portion of the overall chassis roll stiffness.
Dave H is offline  
Old 07-12-2011 | 02:48 PM
  #277  
larlev's Avatar
Tech Master
iTrader: (4)
 
Joined: Apr 2011
Posts: 1,533
From: Austin, Tx.
Default

Originally Posted by fredswain
^Yep. It's best not to have any if you can get away with it. Sometimes you can't.

Would you mind explaining why they should be locked down with no left to right play. I want to share info
larlev is offline  
Old 07-12-2011 | 02:55 PM
  #278  
Tech Elite
iTrader: (1)
 
Joined: Mar 2011
Posts: 2,766
From: Houston
Default

You are using their resistance to aid in roll stiffness. If they move around a little bit without twisting as the suspension moves, you have decreased their effectiveness. You may end up bending the bars a little bit before they start to twist. A little play might not hurt but you want them as tight as they can get yet still be free moving. You shouldn't be able to move them left or right but they shouldn't bind either. If there is nothing connected to them they should just fall down on their own just from the force of gravity but they shouldn't be so loose that they have slop in their mounting.
fredswain is offline  
Old 07-12-2011 | 02:57 PM
  #279  
larlev's Avatar
Tech Master
iTrader: (4)
 
Joined: Apr 2011
Posts: 1,533
From: Austin, Tx.
Default

Originally Posted by fredswain
You are using their resistance to aid in roll stiffness. If they move around a little bit without twisting as the suspension moves, you have decreased their effectiveness. You may end up bending the bars a little bit before they start to twist. A little play might not hurt but you want them as tight as they can get yet still be free moving. You shouldn't be able to move them left or right but they shouldn't bind either. If there is nothing connected to them they should just fall down on their own just from the force of gravity but they shouldn't be so loose that they have slop in their mounting.
Got it....thanks a bunch

There are many racers with them setup wrong
larlev is offline  
Old 07-12-2011 | 09:43 PM
  #280  
Tech Regular
iTrader: (7)
 
Joined: Feb 2011
Posts: 313
Default

Went to wcrc today and got to test and tune my suspension some more. my shocks worked o.k., but need some more dialing in. I am going to go with some 2 stage pistons as my 2wd slash with the rpm 2 stagers work much better than my d8's with single stage on my 4wd slash do.

Anyway, my truck worked pretty good handling wise, but I was having issues with the back end breaking loose unpredictably at the end of the long straight going into a left hand 90 turn. I decided to try moving the inner rear camber links down to give it more of a predictable sliding feel and it worked out pretty good.

The trade off(there always is one) is that it took some getting used to on other parts of the track and I was actually slower around the track except for the one turn at the end of the straight. looks like i need to spend some more time fine tuning it.
nytryder is offline  
Old 07-13-2011 | 03:11 AM
  #281  
Tech Fanatic
iTrader: (22)
 
Joined: Oct 2003
Posts: 814
From: downunder
Default

Originally Posted by fredswain

Let's start with how it handles coming out of a corner. Let's say under hard throttle out of a corner the inside front wheel lifts off the ground and you get severe under steer. Most people would be tempted to stiffen the rear springs. Don't do this! You do need more roll stiffness though so start raising your roll centers. I prefer to keep the links level at level ride height so I'd start shortening the links. Keep testing out of a corner. Does the problem fix itself or does the wheel keep coming up? Can you lower the front roll center? Can you make the front link longer? This will reduce some front roll stiffness allowing the front to roll more. You want all 4 wheels on the ground in a corner!
There is merit in your methods, however I see very little point in starting your tunning coming out of a corner.

If you can not get to where you need to be upon entry to a corner, why would you even consider contemplating about tunning for corner exit!

Not where you need to be on entry you have no chance of being where you need to be on exit!
bjspinner is offline  
Old 07-13-2011 | 04:43 AM
  #282  
bds81175's Avatar
Moderator
iTrader: (20)
 
Joined: Jan 2011
Posts: 2,745
From: Litchfield, Minnesota
Default

Originally Posted by bjspinner
There is merit in your methods, however I see very little point in starting your tunning coming out of a corner.

If you can not get to where you need to be upon entry to a corner, why would you even consider contemplating about tunning for corner exit!

Not where you need to be on entry you have no chance of being where you need to be on exit!
I'm thinking Fred was using that as an example. I think the assumption was that the car was diving into the corners perfectly but struggling on the corner exit. Its something I have going on with my B4 right now. It turns in nicely but doesn't really like to exit and it doesn't really like off-camber turns either.
bds81175 is offline  
Old 07-13-2011 | 06:39 AM
  #283  
Tech Elite
iTrader: (1)
 
Joined: Mar 2011
Posts: 2,766
From: Houston
Default

What if we have severe understeer going into a corner but severe oversteer coming out of it? Where do you start? What if we have severe oversteer going into a corner but severe understeer coming out? Where do you start? I'm sure the obvious answer that someone is going to say is with caster blocks but what if they don't fix your problem? What then? What happens if you get a decent compromise this way but then induce bump steer which lowers stability in other places? Keep in mind not all vehicles have the same amount of tuneability and as such may be more prone to handling compromise than others.

The point I keep trying to get across over and over again is doing things in a systematic fashion. One thing at a time. Don't overthink the scenario and try to fix everything at once. I can't list every single scenario. All I can do is give a few examples and hopefully everyone can figure out the rest from there. That's the whole point. If you want to tackle issues in a different order than my examples then go ahead. Just make one change at a time.
fredswain is offline  
Old 07-13-2011 | 06:43 AM
  #284  
MantisWorx's Avatar
Tech Champion
iTrader: (28)
 
Joined: Jun 2010
Posts: 5,955
Default

Originally Posted by nytryder
Went to wcrc today and got to test and tune my suspension some more. my shocks worked o.k., but need some more dialing in. I am going to go with some 2 stage pistons as my 2wd slash with the rpm 2 stagers work much better than my d8's with single stage on my 4wd slash do.

Anyway, my truck worked pretty good handling wise, but I was having issues with the back end breaking loose unpredictably at the end of the long straight going into a left hand 90 turn. I decided to try moving the inner rear camber links down to give it more of a predictable sliding feel and it worked out pretty good.

The trade off(there always is one) is that it took some getting used to on other parts of the track and I was actually slower around the track except for the one turn at the end of the straight. looks like i need to spend some more time fine tuning it.
go back to the setup you had and just decrease front droop, your problem will go away!
MantisWorx is offline  
Old 07-13-2011 | 07:03 AM
  #285  
Tech Elite
iTrader: (1)
 
Joined: Mar 2011
Posts: 2,766
From: Houston
Default

By lowering the inner rear camber links, the roll center was raised a little bit in the rear. It should lose the rear end a bit worse going into corners. Marcus is right. Put it back. You've just got too much weight transfer to the front during braking.
fredswain is offline  


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.