Soarer Central: Swaybar Selection

Soarer Central Suspension Swaybar Selection

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Steven Nanevski
Goo Roo
New South Wales
E-manage Ultimate equipped TT

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Tuesday, March 06, 2007 - 10:39 pm, by: Steven Nanevski (Imprestik)

Hey all,

Just wondering we always here about aftermarket coilovers and the rest, has anyone around the forum ever updated their swaybars??

What I understand is that the thicker diametre of the swaybar can actually increase steering/cornering response/speed if I put that correctly??

If anyone out there has replaced them, I would like to get some feedback, worth the upgrade etc etc, and also what size/diametre swaybar was used, was front and back both replaced, was anything else replaced at the same time??

I know whiteline do a package, but is very expensive, but I have a local manufacturer here who I have spoken too who can do it for a good price (i think).

Your help would be appeciated.....

Kim Nguyen
TryHard
WA
Soarer TT

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Wednesday, March 07, 2007 - 12:27 am, by: Kim Nguyen (Kim)

Whiteline do front and rear sway bar for our cars, I have been looking into them but haven't got them yet. They are the same diameter I believe but are a solid build instead of hollow like the stock ones.

Been quoted 110-150 for front or rear if I can remember right.

David Vaughan
Goo Roo
ACT
V8 Ltd manual

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Wednesday, March 07, 2007 - 09:14 am, by: David Vaughan (Davidv)

Anti-roll bars have been discussed fairly extensively so Search will give you some good background, Steven.

quote:
What I understand is that the thicker diametre of the swaybar can actually increase steering/cornering response/speed if I put that correctly

At which end do you want to reduce relative grip compared with the other end? Add a stiffer anti-roll bar to that end. This will also add sharpness to response at that end but may reduce absolute grip, something about which many people with stiff springs or bars seem blissfully unaware.

Their advantage compared with stiffer springs is that they make little difference to ride (although increasing unsprung weight) but add cornering stiffness. If you keep front to rear stiffness ratio the same, you will still gain from keeping the wheels flatter on the road.

HTH

Steven Nanevski
Goo Roo
New South Wales
E-manage Ultimate equipped TT

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Wednesday, March 07, 2007 - 01:13 pm, by: Steven Nanevski (Imprestik)

OK, I just read this thread and found it very interesting for circuit use http://soarercentral.com/sc-forum/messages/30604/9194.html?1124780600 but what about for 1/4 mile use, is their any benefit or am I going to waste money??

Matthew Sharpe
Goo Roo
North Island
JZZ31

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Wednesday, March 07, 2007 - 01:31 pm, by: Matthew Sharpe (Madmatt)

I think overly stiff suspension can be a liability in drag racing can't it? You want lots of weight transfer to the rear when the power is applied to aid grip, so I'd imagine you want the car to "squat" a bit?

David Vaughan
Goo Roo
ACT
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Wednesday, March 07, 2007 - 02:03 pm, by: David Vaughan (Davidv)

Anti-roll bars will not increase fore-and-aft stiffness but so far as I know nor are they any use at a drag strip either.

Peter Nitschke
JunkFilterer
South Australia
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Wednesday, March 07, 2007 - 03:39 pm, by: Peter Nitschke (Pen)

Not unless it has corners.

Steven Nanevski
Goo Roo
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Wednesday, March 07, 2007 - 04:49 pm, by: Steven Nanevski (Imprestik)

bottom line is I want my car for both 1/4 mile first then circuit work later, I guess I want the best of both worlds

David Vaughan
Goo Roo
ACT
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Wednesday, March 07, 2007 - 05:35 pm, by: David Vaughan (Davidv)

So fit stiffer anti-roll bars - minimal 1/4 mile impact and useful on the circuit. Best of both worlds also means sub-optimal for each.

Peter Nitschke
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Wednesday, March 07, 2007 - 05:55 pm, by: Peter Nitschke (Pen)

More weight too usually.

Suspension mods really need some research to be meaningful.

Example, by increasing the stiffness at the rear, you also increase the chance of the inside wheel lifting, so it can be advantageous to have stiffer at the front but softer at the rear.

Then that also depends if you have an LSD and what type.

It also depends how twisty the track is that you are running on, etc.

Daniel Clarke
Goo Roo
NSW
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Wednesday, March 07, 2007 - 11:21 pm, by: Daniel Clarke (Dieseltrain)

Stiffer sway bars affect the Squat effect a car has from a standing still! So for quarter mile use, you wnat a car to be able to squat alot and transfer weight to the rear and right side!

Stiffer sway bars CAN make this twist harder and slow down your launch times!

I guess you could always ask about adjustable sway bars.

Soft for 1/4 mile use, and Stiffen them up for circuit work.

Peter Nitschke
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Thursday, March 08, 2007 - 12:43 am, by: Peter Nitschke (Pen)

Daniel Clarke wrote on Wednesday, March 07, 2007 - 11:21 pm:
Stiffer sway bars affect the Squat effect a car has from a standing still!

Coff! The sway bars link to each wheel and swivel freely at the chassis mounts. They only do any work when one wheel wants to move differently to the other wheel.

So with take off squat, both wheels are doing the same thing so the sway bar has NO effect at all.

Perhaps if huge engine torque was noticeably twisting the car.. But then that would still be a good thing.

Jeff Wilkins
TryHard
South Australia
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Thursday, March 08, 2007 - 04:05 pm, by: Jeff Wilkins (Calin)

I had an adjustable whiteline front sway bar fitted when my coilovers were installed. Its been a while, but from memory the bar was about $260.

Much thicker than the stock unit, and solid. Very heavy.

0 effect on 1/4 mile behavior.

Massive effect on turn in (hard to quantify just how much with it being fitted at the same time as the new suspension).

Steven Anderson
Tinkerer
NSW
UZZ31

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Thursday, March 08, 2007 - 08:08 pm, by: Steven Anderson (Cusscuss)

so if i get a soft spring, stand on it on a set of scales i will weigh less than on a hard spring?

I pretty sure it doesnt actually affect weight transfer, but it will affect some other things.

And please dont bring up the vl example, look at real fast, properly sorted car, doorslammer for example, they dont squat.

David Vaughan
Goo Roo
ACT
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Thursday, March 08, 2007 - 08:49 pm, by: David Vaughan (Davidv)

quote:
look at real fast, properly sorted car, doorslammer for example, they dont squat

Crap

http://www.youtube.com/watch?v=JmBh5IA-mSc&mode=related&search=

If you stand evenly with your feet on two springs of different stiffnesses, your weight will be distributed differently across them so far as you can tell from scales beneath them.

Ben Lipman
TryHard
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Thursday, March 08, 2007 - 09:46 pm, by: Ben Lipman (Ben12a)

Steven Anderson wrote on Thursday, March 08, 2007 - 08:08 pm:
And please dont bring up the vl example, look at real fast, properly sorted car, doorslammer for example, they dont squat.

Just about every fast street car based drag car I know of has 90/10 shockies(or similar) and a suspension set up designed to promote "squat", or weight transfer from the front where it is useless to the back where it can aid traction.

Stiffly sprung circuit racers often give 'dissapointing' performances on the drag strip for this reason. Hence the lame ricer excuse of "Yeah, but its setup for track work mostly. If I could get traction it'd be doing 10's"