Springs or Anti Roll Bars

Jarrod Crossley

3000RPM
Feb 18, 2008
3,505
4
When trying to rid your car of that dreaded understeer, most of us go for altering the springs before altering the ARB but is this the way. Or do you differ from the norm and alter the ARB before touching the springs.

Decisions decisions !!! opinions please,
 

Yves Larose

10000RPM
Premium
May 28, 2008
12,145
2,006
52
i usually go for the anti-roll bar first then the rest, don't know if its the way to go but its my way :amen:
 

Ryan Callan

500RPM
Sep 30, 2008
513
502
ARB, then springs :). Springs are trickier to get spot on, so if I need a quick fix I always adjust ARB.
 
V

vmagics

I'm far from 'clued up' in the tuning area. But I treat them as [almost] separate aspects. - Springs for accelerating and decelarating at corners. ARBs for coasting/holding speed at corners. Therefore I honestly don't find any advantage either way...Well, that wasn't much use was it? Sorry.
While on the subject of understeer, if I may I'd like to ask what your (or anybodys)approach to understeer is. The thing that concerns me is the way some cars kind of shudder when understeering. I have found this to be most evident in the GTpro class, especially the Aston Martin DBR9. Is this avoidable or does the shuddering actually help the braking process in some way?
 
C

Chad711

For understeer I usually adjust the toe-in for front and a little in the back. To get some traction out of the turn reduce the lock helps.

I'm no pro at tuning but this is what I am learning and doing lately. It helps
 

Mike Coleman

500RPM
Sep 4, 2008
708
8
Depends on the understeer.

For understeer on fast curves, I lower the wing.

For understeer on slow curves, I raise the rear ARB and lower the front ARB.
 

Dave Stephenson

RaceDepartment Technical Administrator
Staff member
Premium
Sep 4, 2007
10,001
1,606
Depends on the understeer.

For understeer on fast curves, I lower the wing.

For understeer on slow curves, I raise the rear ARB and lower the front ARB.
me too. i always tweak arb before springs. with springs i tend to just go for whats comfortable for most or all if possible of the lap.
 

Jari Vinnari

3000RPM
Jan 27, 2007
3,606
925
Corner understeer= lower front ARB or/and higher back ARB
Fast corner understeer= Higher caster value

peace
Jari
 

Attila Domján

9000RPM
Dec 26, 2006
9,652
25
ARB Jarrod, as explained before by others too. My usual way of making an initial setup: set all springs to minimum, then adjust the ARB for car balance, if it is for some magic reason still not possible to set, then make adjsutment of slow bump and rebound, if still not enough, then touch the springs (1% of the cases, depends also on the car).
 
M

Marcin Wójcik

Thanks Attila for advice:) I've never set all springs to minimum in the beginning. First I set ARB then caster and wings. Springs and bumpers only sometimes when car is still understeer. I must try your way.
 

Trevor Catt

25RPM
Sep 10, 2008
40
0
Attila.
I do exactly the same as you always starting with minimum spring settings I also have brake bias set so that the car will come round under braking and then adjust the bb so that the turn in is good. Once I have the feel of the car how I like I fine tune with the arb's and wings.

Trevor
 

Bram Hengeveld

RaceDepartment Founder
Staff member
Premium
Dec 26, 2006
46,138
19,629
On the beemer i go for the springs first, then ARB and the bumps/rebounds are the final tweak of the process
 
Sep 18, 2008
351
0
43
First i alter the arb's , then the springs , and i do them separate.
lower value toe-in on the front.

i found out that a negative toe on the rear works for me too.
 

Bob Miley

2000RPM
Sep 14, 2008
2,784
1,223
Well as a noob to set ups and after doing quite well with default, I am at the point were from default setup I adjust ARB, then Camber, then Lock/Coast/Preload to try to get it as smooth as I can.

I still have lots to learn.
 

Duffers

1RPM
Oct 4, 2008
4
0
I follow an old set up guide for GTR2 that suggests decreasing the Front ARB for more grip in curves. Still no idea what I'm doing but it works. I just test, sort gears, then do ARB's and check tyre temps after that sort the camber.
 
Feb 19, 2007
11,563
9
37
like Atti
I also set the (front) springs to a minimum for the front wheel drive cars. This is to make the car take less weight pressure on the front and making the tire temperature as low as possible (and so also try to safe more of the tire in longer race).
 

Stuart Thomson

The Stoat Without Fear ™
Premium
Jul 2, 2008
15,164
3,354
51
I generally take the default settings and soften the end of the car that needs the grip to make the car predictable to me. If it understeers, I soften the front. Oversteer, soften the back. I generally do both ARB and springs at the same time.

Predictability generally means I have more confidence in knowing what the car's going to do next, and allows me to push harder. Confidence is more important to me than outright speed.