Sway bar option list
 

I think it's a good idea to start a list like this to help users to make their choices easily.

Stock OEM bar FR-S/BRZ/GT86
Solid
Front : 18mm
Rear : 14mm

% = the % Stiffer than Stock

ST suspensions
Front : 19mm,
2 position 41% & 76%

Rear : 17.5mm
3 position 20%, 58% and 133%

Witheline
Solid
Front : 20mm, 22mm
20mm Fixed or 2 position in option,
Soft Setting - 118.5%
Hard Setting - 174%
22mm 2 position
Soft Setting - 212%
Hard Setting - 288%

Rear : 16mm
3 position
Soft Setting - 40.48%
Medium Setting - 88.78%
Hard Setting - 176.58%
18mm
Soft Setting - 114.63%
Medium Setting - 178.04%
Hard Setting - 263.90%
http://www.whiteline.com.au/do_segue...ehicle=2012-ON

Cusco
Front : 16mm, 20mm
1 position
Hollow
16mm 79%
Solid
20mm 174%

Rear : 14mm, 16mm
Hollow
1 position
14mm 73%
16mm 168%
http://www.cuscousainc.com/vehicle-r...&modelname=475

TRD Stabilizer Set
TRD Site
Jparts Site

Eibach
Hollow
Front : 25mm
2 position
P1 = 88 N/mm (500 lbs/in) +255%
P2 = 103 N/mm (585 lbs/in) +314%

Rear : 19mm
2 position
P1 = 45 N/mm (255 lbs/in) +126%
P2 = 60 N/mm (338 lbs/in) +200%
http://performance-suspension.eibach...-roll-kit_2013

Hotchkis
Hollow
Front : 25.4mm
2 position
500 lbs/in 170%
630 lbs/in 245%

Rear : 19mm
4 position
320 lbs/in 200%
405 lbs/in 275%
520 lbs/in 385%
700 lbs/in 550%
http://www.hotchkis.net/scion-frs-sp...sway-bars.html

Perrin
Front : 19mm, 22mm
2 position
19mm Hole #1 25%
19mm Hole #2 72%
22mm Hole #1 130%
22mm Hole #2 218%
http://perrinperformance.com/i-13324...-fr-s-brz.html

Rear : 16mm, 19mm, 22mm, 25mm
3 position
16mm Hole #1 30%
16mm Hole #2 65%
16mm Hole #3 116%
19mm Hole #1 150%
19mm Hole #2 243%
19mm Hole #3 347%
22mm Hole #1 400%
22mm Hole #2 535%
22mm Hole #3 729%
http://perrinperformance.com/i-13324...-fr-s-brz.html

Tanabe
% Stiffer compared to Japan OEM.
Front : 22mm
1 position 205%

Rear : 18mm
1 position 235%
http://www.tanabe-usa.com/rnd/?tag=/fr-s

Strano FSB
Front : 22mm
1 position
85% Stiffer than 18mm OEM bar
http://www.stranoparts.com/partdetails.php?PartID=928

SuperPro
Front : 20mm, 22mm

Rear : 18mm, 20mm
http://www.fastwrx.com/suswbafbr.html

RaceComp
Hollow
Front : 25mm (22mm solid equivalent)
2 position
P1 = 60 N/mm (335 lbs/in)
P2 = 80 N/mm (455 lbs/in)

Rear : 19mm (16mm solid equivalent)
2 position
P1 = 33 N/mm (188 lbs/in)
P2 = 45 N/mm (257 lbs/in)
http://www.racecompengineering.com/i...sway-bars.html

Progress
Front : 20.5mm

Rear : 17.5mm
2 position
http://www.progressauto.com/products.../productID/759

ST
Solid?
Front : 19mm
1 position

Rear : 17mm
1 position

Dear Mikepage,

Sounds a bit sexist.

Yours faithfully,
Unicorn

Sway bar option list
 

Sorry, it's better now...am Canadian you know, my first language is french.

Then correct me when am wrong ;)

He's just messing around with you. You put her in place of their in your OP.

I think this is a good idea as well.

Being the OEM nutbag that I am:
TRD Stabilizer Set -
TRD Site http://trdparts.jp/conceptcar/86_per...uspension.html

Jparts
http://www.japanparts.com/db/parts_d...=23&submit.y=4

http://i2.photobucket.com/albums/y16...psead34d9b.jpg

The rear sway bar from a 2008+ (correct me if i'm wrong) WRX will fit. I swiped one off of NASIOC for 35 shipped

Sure, it fits. But does it improve handling at all? How so, why?

Sway bars are one of those things I see people often install on their cars for no real rhyme or reason but do it just to do it and sometimes hurt their car's handling in many cases.

That's why^. I was bored.

People change parts to change parts without ask any questions why.

The goal is to make changes to improve something you want.

Dearn Ocean-Grown 86,

You may find the below links somewhat relevant:

http://www.ft86club.com/forums/showthread.php?t=28221

http://www.ft86club.com/forums/showthread.php?t=37006

Yours sincerely,
Unicorn

@CSG Mike & @Racecomp Engineering do sway bar manufacturers always use the same material? In not, how much of a difference can that make to the stiffness of the bar?
@Mikepage could you add the stock bars to the list?

Don't forget the Strano FSB

I will update tonight for sure.


Sent from my iPhone using Tapatalk - now Free

Tanabe
22mm
Hollow
1 position

Sway bar option list
 

Do you have a link for this?

First post updated!

Don't forget you can use
2008+ STI rear sways which are 19mm
Or 2010+ WRX which is 16mm

The stock sway bars are one of the best suspension parts on this car and I will not be touching it at all. I don't see many aftermarket ones that will beat it.

:thumbdown:

:thumbsup:

Can you explain your point?

Just scored a 19mm Perrin rear STI swaybar with end links for $150!

Great list!! :w00t:
Just a suggestion:

You might want to list either HOLLOW or SOLID.
The stiffness of the bar will vary greatly depending whether hollow or solid.
Without knowing that, it'll be tough to gauge stiffness with diameter alone.

is the oem hollow or solid?

OEM is solid

Sway bar option list
 

I will try to update the list soon concerning hollow and solid informations.

Typically most aftermarket bars are solid, as solid is bit cheaper to make.

No difference? Please do enlighten us.

Hollow is softer per OD mm vs solid.

You can have a hollow and a solid of equal stiffness, but in such cases the hollow will typically have a larger OD and weigh a couple of pounds less.

Hollow bars are typically designed to provide a certain level of stiffness while trying to save some weight vs solid.

Calculations exists on the differences all over the internet.

If you are comparing bars based on diameter, the detail of it being solid or hollow DOES MATTER.

Sway bar option list
 

Don't be mad bro ;) we are here to learn, I don't have any problems to say when am wrong.

Could you show to us? Then you will probably inform users correctly.

I want to understand what is the difference between an solid and an hollow bar.

I don't think it's enough big to really see the difference on the street and also maybe on a race track. I mean the difference between the 2 bar types.

I am pretty sure if you try both, hollow and rigid, you will probably not see any differences. It's only about how much the bar are more stiffness then the oem. Example, if you have the same % of stiffness between an hollow and an rigid bar then this is the same thing.

We say the same thing ;)

I just want to say, look at the % of stiffness you want to add on your car and make your choice from this.

No ones mad here.
Just saying there is a difference. That difference is weight.
It's really that simple.

If you are racing in a competitive class, then any opportunity to save a few pounds here and there are sometimes appreciated (they can add up). If you are just modding a car for fun, then it really doesn't matter.

View from this point yes you are right :)

Percentage increase over OEM for our 16mm adj rear swaybar are as follows –
Soft – 44%
Med – 89%
Hard – 114%


18mm bar –

Soft – 129%
Med – 199%
Hard – 251%



Email from Whiteline, after I enquired about their rear bars.

Thank you, I will update the first post soon.

The problem is, it's all bollocks. When you use those outer holes, you're changing the pick up point for the drop-link, which in turn affects the curve throughout the motion. It can also potentially place a lot of additional/wrong load onto the drop link. For reference, Subaru use the same drop links for 16/18/19 bars, possibly thicker but I haven't bothered checking.

The most reliable way to use these 'adjustable' bars is use the hole closest to OE! Forget the rest!

I never thought about this, you bring a good point, I will think about it when will change my sway bar.

It's difficult to know how the car will react whit a bigger sway bar this is why they put holes to give the possibility to correct the handling depend on the setup.

I try to mean, it's maybe a little bit difficult to know exactly the bar we want, example : to get more oversteer, not to much and I need to bought a bar with only one hole in the perfect spot according to my setup.

You get adjustable end links. And, if you have their LCAs you have multiple mounting point options.

I'm not entirely following what you're actually talking about, but would guess that's what these other adjustments are for..?

Eibach, Hotchkis, and our RCE bars are hollow. Not sure on anyone else.

Our 25mm front hollow bar is roughly equal to a 22mm solid.

Our 19mm rear hollow bar is roughly equal to a 16mm solid.

Both would weigh less than a solid bar of similar stiffness.

I can post the equations if you're curious but it doesn't do much good if you don't have the inner diameter of the bar tube.

- Andy

First post unpdated!

Is it me, or the % (percents) the mfgs are spouting of +XX% or +YYY% increase are not the same for stock?


What are the values for stock and that should be in the list, pointing out those that are being *cough* slightly inaccurate as to their rate increases.

Sway bar option list
 

First post updated for whiteline spec!

I recently installed SPL Pro rear LCA with end links, was able to play with the 3 different mounting point for the end links on the LCA with OEM sway bars at Laguna Seca, each mouting point makes drastic change on oversteering - more stiffer more oversteer, im pleased with the softest setting resembling OEM driving dynamic and clocked the fastest time.

Long story short - OEM sways are awesome!!