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sway bar question

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Old Jul 27, 2008 | 06:52 PM
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Default sway bar question

A while back, I orderd a 25mm rear sway bar from sphon. After reading that a 25mm rear bar is too much for the street, I dont know if I should put it in or not.
I mostly drive the car on the street, but I would like to handle a hard launch at the track.
Should I:
1) Sell the bar & get a Strano 35mm front/22mm rear
2) Find a front bar to match the 25mm rear bar
What would you guys suggest?
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Old Jul 28, 2008 | 06:18 AM
  #2  
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The bad news is you can't find a front bar that "matches" a 25mm rear correctly. A 35mm front is the best you can do (and what you want), but the difference between a 22mm and a 25mm is about 40% more roll stiffness, as bars work on a factor of OD to the 4th power. Both my 35/22 and the stock on a SS/WS6/1LE combo of 32/19 have about the same balance (I'm just up about 30% stiffer on both ends). Running a 35/25, or 32/22 combo is more equivilent to the balance you get with a 30/19 set of bars (stock Z28/Formula).

What we don't want is to make the rear too stiff, and IMHO a 25mm bar does that. The hurt is somewhat minimized by a 35-36mm front bar, but it's still too rear stiff relative to the front increase.
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