are sway bars really going to make a difference?

Originally Posted by Stinger9

Chart for comparing Sway Bars

Eibach front 27mm

Every mile of every day.


What the heck did I just say?

thank you very much,i can get my Eibach kit this week

HUGE DIFFERENT!

I have the Eibach Anti-Roll Kit for F+R
27mm in the front
21mm in the rear

I think they are more effective than springs, especially on high speed corners.

super,tomorrow i can test them on my car;-)

5 min ago
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Easy to show in the box.

Harder to show on the car!

Did you get new links to put on at the same time?

installed this afternoon,another drive,but i have do only a fast turn,tomorrow maybe more km test

Originally Posted by Mc 007

installed this afternoon,another drive,but i have do only a fast turn,tomorrow maybe more km test

excited to hear your feedback

fantastic,yesterday i do a test of 60km,another drive...i must learn to drive my car

Originally Posted by Stinger9

Chart for comparing Sway Bars

This chart is only relevant for solid sway bar sizing.

Originally Posted by subieworx

This chart is only relevant for solid sway bar sizing.

What kind do you have?

Stock.

A typical hollow bar has a .25" wall thickness and with lots of complicated math can be found to have a lower overall stiffness than a solid bar. Most 25mm bars have an equivalent stiffness to a solid 22mm.

True, they save steel and weight with a hollow bar because the torsional rigidity is derived mostly from the resistance to twisting of the steel at the outer part of the radius rather than the steel they 'remove' from the core.
How can you tell whether your bar is hollow or solid for sure?

Try a heavier bar sometime on your car. Very satisfying.

Why is the math more complicated than computing the rigidity for a solid bar and then subtracting the rigidity of a solid bar with the diameter of the hollow space within?

Think about that. If the bar was 25mm OD with .25" wall thickness that would mean that the inside diameter (hollow section) would be 12.3mm. That would leave an equivalent stiffness of 12.7mm i.e. the 25mm hollow bar is WAY less stiff that a stock 20mm bar. (all hypothetical bar sizes) The math is quite complicated.

My saying that a 25mm hollow is roughly equivalent to a 22mm solid is a gross oversimplification. The actual wheel rate of a bar is also influenced by the lever arm of the bar. A bar with a 12" lever arm is going to be much less stiff than a bar with a 1" lever arm as that arm (as measured from the center of the portion of the bar that spans the bushings) due to the mechanical advantage of the longer arm. Example: a 50mm bar with a 12" lever arm could actually have an equivalent stiffness that is less than a 10mm bar with a 1" lever arm. (just for reference and very likely not the case, but you get the point)

I did think about it. I don't think you understood my suggested methodology. Please re-read.

And

I normalized the length of the lever arm for comparative purposes. No need to factor them in.

Wasn't trying to be mean.

I understand what you said as I described in my example. The lever arm example was to help people further understand sway bars.

My Hotchkis bars made a HUGE difference. And with my coilovers now the chassis has little to no roll. The limiting factor now is solely just my tires

^x10,000

Just put hotchkis bars on my car today as well. HUGE difference