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Old 01-10-2010, 02:39 PM   #46
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Actually thats about the opposite of what I did considering I did have the sway bays are when I did have the TR problems. Look at it like this, when cornering the car wants to roll . Using a setup where the chassis can roll but keep the tires on the ground is achieved by softening. Sway bars are going to limit the chassis ability to roll and that energy is going to want to go somewhere, so up and over it goes. When I took them off, no more TR.
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Old 01-10-2010, 02:47 PM   #47
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Quote:
Originally Posted by DieselBurner View Post
Get the beefiest sway bar on the market. rolling takes having one side off the ground, sway bars eliminate that.
I disagree.

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Originally Posted by Lenman73 View Post
Actually thats about the opposite of what I did considering I did have the sway bays are when I did have the TR problems. Look at it like this, when cornering the car wants to roll . Using a setup where the chassis can roll but keep the tires on the ground is achieved by softening. Sway bars are going to limit the chassis ability to roll and that energy is going to want to go somewhere, so up and over it goes. When I took them off, no more TR.
I agree.
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Old 01-10-2010, 04:01 PM   #48
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Sounds like your on the right track with what is being said. You might also look into a little more caster possibly. Caster is funny, too little will cause it and too much can contribute also.

Definitely letting the chassis move a little more helps. In my opinion, I like to run a bit softer setup, and then run sway bars to help square it up faster in & out of a turn.
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Old 01-11-2010, 04:10 AM   #49
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Default traction roll

so far from what i understand you guys recommend the following meassures against traction roll (no particular order):

-glue the sidewall of tyres
-softer springs overall (i would add no progressive springs)
-front anti dive
-less camber in front (back?)
-softer swaybars or non at all
-softer oil (eg 450 MuchMore)

what i dont get is the droop setting. would you guys recommend that the suspension arms angle more upward (more preload on damper) or that the arms are angled more downward ??

have i missed anything in the list above??
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Old 01-11-2010, 07:49 AM   #50
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Sometimes you need to go stiffer to stop traction roll, sometimes you need to go softer. It's frustrating to judge which is the right choice.

If I have any observations, it is that if the car "snaps" into a roll, the car is probably too stiff. If it is "lazy" into a roll, the car is probably too soft.
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Old 01-11-2010, 08:32 AM   #51
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on average how much camber have you guys taken away? (so say ran zero camber, then went to -2 camber, etc)
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Old 01-11-2010, 08:19 PM   #52
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Sometimes you need to go stiffer to stop traction roll, sometimes you need to go softer. It's frustrating to judge which is the right choice.

If I have any observations, it is that if the car "snaps" into a roll, the car is probably too stiff. If it is "lazy" into a roll, the car is probably too soft.
Well put!!

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Old 01-11-2010, 08:21 PM   #53
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Old 01-11-2010, 08:25 PM   #54
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Quote:
Originally Posted by vitomon View Post
so far from what i understand you guys recommend the following meassures against traction roll (no particular order):

-glue the sidewall of tyres
-softer springs overall (i would add no progressive springs)
-front anti dive
-less camber in front (back?)
-softer swaybars or non at all
-softer oil (eg 450 MuchMore)

what i dont get is the droop setting. would you guys recommend that the suspension arms angle more upward (more preload on damper) or that the arms are angled more downward ??
Droop is relative to your ride height and traction. I would run at least 2mm droop. The lowest ride height for most classes is I think 4mm. TC I think is 5mm at most clubs.

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Originally Posted by vitomon View Post
have i missed anything in the list above??
I kind of like progressive springs, yet I have never used them when traction rolls were an issue.

Softer oils +
Glue the sidewalls - Last ditch choice!! -
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Old 01-11-2010, 09:15 PM   #55
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Can't you also take away the droop a bit to lessen traction rolling?
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Old 01-11-2010, 09:38 PM   #56
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Tom, there is a fine line here also. Take a look what Sosidge wrote.

Most of my experience has been that droop needs to be added though.
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Old 01-12-2010, 01:51 AM   #57
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so by "more droop" you actually mean the arms will be more flat/or angled downward??
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Old 01-12-2010, 05:47 AM   #58
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Droop is how much the car will raise up in the front or back, from its current ride height with the tires still touching the surface. Too many other variables affect arm positions, so that is irrelavent.
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Old 01-12-2010, 06:37 AM   #59
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Quote:
Originally Posted by vitomon View Post
so by "more droop" you actually mean the arms will be more flat/or angled downward??
No. The arms will droop more before lifting off the track.

Less droop is not at all what you want. You want more droop as suggested above.
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Old 01-12-2010, 10:00 AM   #60
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Originally Posted by niznai View Post
No. The arms will droop more before lifting off the track.

Less droop is not at all what you want. You want more droop as suggested above.
more droop, so say from 2mm to 3mm for example?

most setups call for internal limiters to reduce droop, which helps reduce traction roll.

this is a paragraph of the setup tips I look at times when im confused:
Adding more internal travel limiters is a very effective way of reducing traction rolls, if not the most effective way.
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