Swaybar for regular driving?

[tmontague]

Originally Posted by dogsridewith

Show any source calling this type of rear suspension not IRS. Or describing it as "solid beam."

The responsibility of finding a source would land on you. The yaris lacks any type of rear control arms and both rear wheels are attached through a solid h style axle.

Making a statement for the second time of Yaris' having independent rear suspension would require a source on your part to support your claim as it goes against what an irs set up looks and functions like.

Lets keep the thread on topic for the op, if you want to discuss your interpretation of the rear suspension then by all means do so, but on your own thread

[dogsridewith]

Originally Posted by tmontague

....both rear wheels are attached through a solid h style axle.

The cross-the-car part of this piece isn't "solid". It is torsionally soft to do what a sway bar does. You might say it replaces separate trailing arms, two lateral links and a sway bar with a single piece. That was VW's invention, and why Toyota uses it.
This is not off-topic. It will be fine for OP to know more about his suspension as he modifies it...particularly that it already includes some roll control.
(In a very crude search of the Yaris rear suspension, I'm finding the terms "torsion beam rear suspension," and "semi-independent rear suspension." The main thing is to understand how it works.)

[ern-diz]

Originally Posted by dogsridewith

The cross-the-car part of this piece isn't "solid". It is torsionally soft to do what a sway bar does. You might say it replaces separate trailing arms, two lateral links and a sway bar with a single piece. That was VW's invention, and why Toyota uses it.
This is not off-topic. It will be fine for OP to know more about his suspension as he modifies it...particularly that it already includes some roll control.
(In a very crude search of the Yaris rear suspension, I'm finding the terms "torsion beam rear suspension," and "semi-independent rear suspension." The main thing is to understand how it works.)

So, if I'm comprehending, you (like Jason, the gentleman that is 2 Yaris race builds deep and who appears to have the most Yaris track time logged) would vote against adding a sway bar, correct?

[dogsridewith]

Originally Posted by ern-diz

So, if I'm comprehending, you (like Jason, the gentleman that is 2 Yaris race builds deep and who appears to have the most Yaris track time logged) would vote against adding a sway bar, correct?

Yes, for what I do with the car...it already feels like a go cart to me, and I want something that drives great on choppy off-camber tertiary roads, high crown gravel, and when you have to drop a wheel over the edge trap because something big oncoming is using most of the pavement.
For auto-crossing w/ pegleg differential, more rear swaybar would give more fwd traction.