Front Sway Bar - Toyota Yaris Forums

bronzebullet232 · 04-02-2010, 12:37 PM

Anybody have a front sway bar on the hatchback? I've been autocrossing a lot lately and want to get rid of some understeer.

My current set up is DF210s, Tokico HP's, 23mm Ultra racing rear bar

Bluevitz-rs · 04-02-2010, 01:57 PM

Try disconnecting the front bar from the control arms first and see how that goes.

Edit: sorry, disconnect from the struts on the Yaris I believe.

You want less front sway bar if you have understeer.

Tamago · 04-02-2010, 05:49 PM

Quote:

Originally Posted by bronzebullet232

Anybody have a front sway bar on the hatchback? I've been autocrossing a lot lately and want to get rid of some understeer.

My current set up is DF210s, Tokico HP's, 23mm Ultra racing rear bar

what are your alignment specs? a larger front swaybar is going to INCREASE understeer.

mshekleton · 04-23-2010, 07:50 PM

Um, I'm pretty sure that a larger front sway bar increases oversteer and a larger rear sway bar increases understeer.

*edit*
Ah, you're right:
"Understeer or oversteer behavior can be tuned out by changing the proportion of the total roll stiffness that comes from the front and rear axles. Increasing the proportion of roll stiffness at the front will increase the proportion of the total load transfer that the front axle reacts and decrease the proportion that the rear axle reacts. This will cause the outer front wheel to run at a comparatively higher slip angle, and the outer rear wheel to run at a comparatively lower slip angle, which is an understeer effect. Increasing the proportion of roll stiffness at the rear axle will have the opposite effect and decrease understeer."

cali yaris · 04-23-2010, 08:31 PM

The Yaris likes a bigger front sway bar a lot. I know on paper it makes a car understeer more, but the reduction of excessive rolling helps the front end stick better in this case.

New2tuning · 04-23-2010, 08:34 PM

Quote:

Originally Posted by mshekleton

Um, I'm pretty sure that a larger front sway bar increases oversteer and a larger rear sway bar increases understeer.

*edit*
Ah, you're right:
"Understeer or oversteer behavior can be tuned out by changing the proportion of the total roll stiffness that comes from the front and rear axles. Increasing the proportion of roll stiffness at the front will increase the proportion of the total load transfer that the front axle reacts and decrease the proportion that the rear axle reacts. This will cause the outer front wheel to run at a comparatively higher slip angle, and the outer rear wheel to run at a comparatively lower slip angle, which is an understeer effect. Increasing the proportion of roll stiffness at the rear axle will have the opposite effect and decrease understeer."

Paging Dr. mshekleton

Tamago · 04-24-2010, 05:50 PM

Quote:

Originally Posted by cali yaris

The Yaris likes a bigger front sway bar a lot. I know on paper it makes a car understeer more, but the reduction of excessive rolling helps the front end stick better in this case.

you have an LSD.

totally different

04-02-2010, 12:37 PM	#1
bronzebullet232 View User's Garage Drives: 2010 Black 3dr Lift Back Join Date: Nov 2008 Location: California Posts: 62	Front Sway Bar Anybody have a front sway bar on the hatchback? I've been autocrossing a lot lately and want to get rid of some understeer. My current set up is DF210s, Tokico HP's, 23mm Ultra racing rear bar

04-23-2010, 08:31 PM	#5
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	The Yaris likes a bigger front sway bar a lot. I know on paper it makes a car understeer more, but the reduction of excessive rolling helps the front end stick better in this case. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

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04-02-2010, 01:57 PM	#2
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	Try disconnecting the front bar from the control arms first and see how that goes. Edit: sorry, disconnect from the struts on the Yaris I believe. You want less front sway bar if you have understeer.

04-23-2010, 07:50 PM	#4
mshekleton Drives: 2007 Yaris HB Join Date: Apr 2010 Location: New Jersey Posts: 25	Um, I'm pretty sure that a larger front sway bar increases oversteer and a larger rear sway bar increases understeer. edit Ah, you're right: "Understeer or oversteer behavior can be tuned out by changing the proportion of the total roll stiffness that comes from the front and rear axles. Increasing the proportion of roll stiffness at the front will increase the proportion of the total load transfer that the front axle reacts and decrease the proportion that the rear axle reacts. This will cause the outer front wheel to run at a comparatively higher slip angle, and the outer rear wheel to run at a comparatively lower slip angle, which is an understeer effect. Increasing the proportion of roll stiffness at the rear axle will have the opposite effect and decrease understeer."