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is it necessary to change anti-roll bar?
I do not know. because there is no car here.
Never heard about such topic here. Does anyone know? |
That's up to personal preference. Bring the car to a track and see how it drives first. After you know how it performs, you'll be able to make an informed decision on what needs to be modified.
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As for needing them, it will depend on the rest of suspension setup. |
Honestly, I don't see much need.
On both my previous cars, I've swapped out to larger diameter/adjustable bars. This car though seems to do good as is, and thats with a rear bar that looks like a twig. |
From AVO:
Updates from the Option 2 magazine event, with Orido driving: We fitted our 18mm solid rear bar halfway through to see how that would affect the handling. Unfortunately, not in a good way - it was nearly a second slower than with the standard rear bar. Orido said it was initially quite entertaining, the rear end would drift through nearly any sort of corner, but also quite twitchy, and ultimately harder to get through the course fast. What we found so far is that, with the perfect 50/50 balance of the car from the factory, putting on a larger rear bar only, or a larger front bar only, will just upset that balance. Subaru/Toyota really did a good job of setting up the car out the door. Any swaybar upgrades need to be very carefully balanced front to rear, or you'll upset the balance, and ultimately, grip. http://www.ft86club.com/forums/showt...?t=9101&page=2 Quote:
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i think you just need to find out what frc you want, what frc you have and decide whether or not a sway bar or two is going to get you there |
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Necessary for what?
There are going to be cases where changing the swaybars will help. There are some where it won't. It depends on the rest of the suspension, tires, use of the car, and driver preference. No single setup is going to work best for everyone, which is why there are/will be adjustable swaybars in numerous sizes. The nice thing about this car is that it is much lower and lighter than the WRX which has nearly identical suspension design. With a Subaru, you generally need to go to a fairly large bar, which has it's drawbacks. The BRZ will be able to get away with smaller sizes. An 18mm swaybar is nearly three times stiffer than a 14mm bar btw. |
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It should depend on the suspenion setup. How about stock suspension? I think the stock setup including suspension and sway bar is good enough, so balance. |
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Toyobaru really did a good job ! |
Just keep in mind what you'll be doing with the car in addition to your mods. A bar might help with autocross but might hurt on a road course / on the road...
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generally street cars that enjoy spirited driving rely on anti-roll bars to prevent "sway'" in the front and/or rear because they run softer spring rates. In a track focused vehicle, the emphasis is more on heavier/stiffer springs than anti-roll bars.
So yes, for most people wanting to improve the handling of their street car, anti-roll bars are applicable. I personally would never upgrade just one sway bar (unless you want a drift set up) as it upsets the balance of the car. You'd be best upgrading the front and rear at the same time with this car (theoretically speaking of course since most people havent played with this sort of stuff yet). |
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And yes I know it is ubiquitous in the tuner and grassroots racing to call them sway bars. But it doesn't make it correct, and the pros don't use that term. /rant |
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