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Old 06-05-2013, 08:04 PM   #1
HAL1
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Default Daily driver and sway bar upgrade difference?

You've all given me great info, and I've read all the threads. Without this getting in to a big discussion, my question is simple... in changing from my front/rear 21/16, to a 20mm rear will I notice a difference in my daily street driving? Such as on ramps or accelerating during a turn in an intersection? Or do I need to be pushing it super hard to notice a difference?
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Old 06-05-2013, 08:07 PM   #2
isotopesope
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you'll definitely notice a difference.
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Old 06-05-2013, 09:30 PM   #3
dreamwonder
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Good upgrade, car will be pretty neutral. You will feel more rotation when driving hard, but not so stiff that you are losing overall grip. Assuming everything else is stock this upgrade will still allow the car to maintain control and drivability in all conditions like the original 16mm did.

What can go wrong when the rear bar is too stiff? Here are some rough examples.
With a 22mm bar car feels great on a hot summer day with summer tires, rotation is great, when driving at the limit u feel this nice controllable oversteer. When temperature drops into the 60s things are now different, if driven hard the car will have sudden snap oversteers (tires no longer have the grip for the extra load).
As you might have guess, if say a even thicker bar is used, say 27mm, you will experience even more oversteer and snap oversteer.

On a side note, you might want to consider the stock sti bar at 19mm, they are cheap can be had for $100. 20mm aftermarket bars are much more expensive.

Last edited by dreamwonder; 06-05-2013 at 09:48 PM.
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Old 06-05-2013, 10:56 PM   #4
HAL1
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Quote:
Originally Posted by dreamwonder View Post
On a side note, you might want to consider the stock sti bar at 19mm, they are cheap can be had for $100. 20mm aftermarket bars are much more expensive.
Yeah, as mentioned in a previous thread I'm torn between the $100, Stock 19mm STi or the $170 20mm Whiteline. I guess the 1mm doesn't make much difference but thought that the 20mm Whiteline would be closer to my 21mm front making it even more neutral.

Last edited by HAL1; 06-05-2013 at 11:12 PM.
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Old 06-06-2013, 12:06 AM   #5
isotopesope
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if you're going to spend the money for the whiteline bar, why not just spend a tiny bit more and get an adjustable bar from them? using asymmetrical settings, you have the possibility of 5 stiffness settings!

a bigger rear sway bar is hands down the best bang for your buck single suspension modification you can make.

i'm currently running their 22mm rear adjustable bar set to the softest "21mm" setting, plus their reinforcement braces. i love the way my car handles, even on the stock butterball 08 WRX suspension. i am still using the stock front bar with front and rear rallitek endlinks. i think my 08's front is a 20mm. the rear was a wimpy 15mm. i plan to eventually upgrade my front to a 22mm adjustable. this is solely a daily driver for me.

this sticky is REALLY great at explaining all the myriad sway bar combinations:
http://forums.nasioc.com/forums/show....php?t=2462278

even if you've read it, read it again.

you'll really need to analyze your current and prospective goals and uses for the car. maybe the STi rear bar is all you'll need... but i doubt it.
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Old 06-06-2013, 11:43 AM   #6
bigmaninjapan
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What part number are you referring to on the Whiteline adjustable bar? I was about to post this exact same thread for my '08 Sedan. I've been looking at BSR49XZ on Whiteline's site.

OP, tell me to F-off and start my own thread if you feel this is a derailment.
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Old 06-06-2013, 11:58 AM   #7
isotopesope
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Quote:
Originally Posted by bigmaninjapan View Post
What part number are you referring to on the Whiteline adjustable bar? I was about to post this exact same thread for my '08 Sedan. I've been looking at BSR49XZ on Whiteline's site.
that's precisely the bar i have, with the included support braces.
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Old 06-06-2013, 12:35 PM   #8
HAL1
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Quote:
Originally Posted by bigmaninjapan View Post

OP, tell me to F-off and start my own thread if you feel this is a derailment.
Haha. Nope you're fine.

Last edited by HAL1; 06-06-2013 at 12:40 PM.
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Old 06-06-2013, 12:39 PM   #9
HAL1
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Isotopesope, I know that thread and have read up a bit. Really just want fixed and whether I'd notice a difference in my daily driving as I said. There's plenty of threads on sway bars and didn't mean for this to duplicate what's already out with.
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Old 06-06-2013, 02:36 PM   #10
isotopesope
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Quote:
Originally Posted by HAL1 View Post
Isotopesope, I know that thread and have read up a bit. Really just want fixed and whether I'd notice a difference in my daily driving as I said. There's plenty of threads on sway bars and didn't mean for this to duplicate what's already out with.
ha! oh no worries. i just think it's super helpful, that's all. i'm no "SEARCH" nazi. carry on.
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Old 06-06-2013, 02:44 PM   #11
nightdown fox
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STI rear bar and an alignment really changed the feel of my car. You could actually feel the rear "communicate" when cornering. There's still some lean and slop in there though, but it's a ton better than stock. Need to do my endlinks next...
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