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SeanF
11-28-2006, 09:41 PM
so, i realize why we use swaybars....

but dont they defeat the purpose of an independent suspension? by limiting the independence of one side from the other?

by beefing up the swaybars arent we trying to do the opposite of what the engineers were doing by using an independant suspension?

or are these irrelevant from eachother?

ExpLlclT
11-28-2006, 09:47 PM
lol forgot my explaination

sandnessmj
11-28-2006, 10:27 PM
Not really, a swaybar does a few things. It counters body roll, and preloads the suspension. Beefier swaybar means less body roll and more preload on the inside suspension during cornering.

Neither of these defeat the purpose of independent suspension.

SeanF
11-29-2006, 03:52 AM
but isnt the purpose of an independent suspension to be..... independent from one side to the other...

ScottyB 1.8T
11-29-2006, 10:01 AM
Originally posted by SeanF
but isnt the purpose of an independent suspension to be..... independent from one side to the other...

you're right in that a sway bar ties one side to the other, but not so much that there still isn't a ton of independant movement between both sides. it's not really a problem unless you're talking about the rear end of a fwd car.

also, even in the event that you run a really beefy swaybar, both sides of the car still benefit from individual camber control, something that a live axle car (non independent) doesn't have.

sway bars ultimately act like a helper spring in a turn, like others have mentioned. they are not essential (some race cars use only springs, no bars) but they are a great aid in "tuning" the balance of the car.

SeanF
11-29-2006, 10:04 AM
ah ha!, i didnt even think of it alignment wise...

onemoremile
11-29-2006, 10:04 AM
There are always certain compromises to be made to get a desired result. You can run very stiff springs with highly sophisticated dampers on a track car and not need anti-roll bars at all. We use ARBs on street cars to make up for the massive spring rate needed to counter body roll. The ARBs let us have reasonable spring rates and decent ride quality.

smoothie
11-29-2006, 11:57 AM
also sway bars arent only used on independent suspension....also on solid axles. the biggest thing they do is control body roll by minimizing it and increase body stability in cornering. the function of the independent suspension is still there, it is not completely eliminated with a bigger sway bar. a independent suspension gives you better feel and stability on the wheels also. say if you had a track car with a solid rear axle, think of the suspension set up you would have to have to control that rear end. even if you had a beefy sway bar and it basicly eliminated all body roll you would still have the major benifits of an independent suspenion.

sandnessmj
11-29-2006, 12:00 PM
Originally posted by ScottyB 1.8T
they are not essential (some race cars use only springs, no bars) but they are a great aid in "tuning" the balance of the car.


Good point. Choose your sway bar setup carefully, because it makes a big impact on the balance of oversteer/understeer.