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      12-22-2009, 09:25 AM   #1
vitig
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Installed rear swaybar and doubts

I have the e93 front swaybar that give me a good reduced of body rolling.The rear of the car still had sway and i decided install the e92 swaybar, whit this installed the body rolling is disappear, but i have two problems:

1. The car less very much traction when one tyre support more than the other tyre (i only drive in wet road).
2. The rear of the car is more abrupt when you look for drift,before install the rear bar the rear of the car was inclined and next drift progressive.Now is more easy to extend the drift but in the begining is abrupt.This problem i think that is probably maked for my habit whit the car before install it.

In chassis only have this bars and the good year asymetric no runflat.I have ordered bilstein b8 shocks(30 days to delivery) and eibach pro kit springs(this arrived yesterday).This combo , do it solve my problems? or i want a lsd?.
Is better that i mount now the springs or wait to the shocks to mount all?.
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      12-22-2009, 03:32 PM   #2
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did you torque the rear bar equally on both sides?
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      12-22-2009, 04:03 PM   #3
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what i think you're describing are standard effects of installing a stiffer rear bar. you'll adjust your driving habits to accomodate the more abrupt oversteer, but unweighting of the inside tire caused by the bigger rear bar may be problematic with this differential.
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      12-22-2009, 04:53 PM   #4
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Quote:
Originally Posted by chesterfan1230 View Post
did you torque the rear bar equally on both sides?
I don´t measured it. You said about the fixing whit chassis or the fixing whit arms?.what torque need it?.
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135ijb3, h & r filter, SSK, CDV,clutch stop, klracing fmic,seccond catted ,225-255 michelin ps3, E93F-E92R swaybars.M3 parts front.M3 tension rear.Plates mod(F-2,0º R-1,5º).Bilstein + stock springs.Ps rotors.Subframe bushings.Weichers fstruut.Finally mods sdiff and raceland dp.

Last edited by vitig; 12-22-2009 at 05:18 PM..
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      12-22-2009, 04:54 PM   #5
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Quote:
Originally Posted by fourtailpipes View Post
what i think you're describing are standard effects of installing a stiffer rear bar. you'll adjust your driving habits to accomodate the more abrupt oversteer, but unweighting of the inside tire caused by the bigger rear bar may be problematic with this differential.
I'm sure that's one reason.
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135ijb3, h & r filter, SSK, CDV,clutch stop, klracing fmic,seccond catted ,225-255 michelin ps3, E93F-E92R swaybars.M3 parts front.M3 tension rear.Plates mod(F-2,0º R-1,5º).Bilstein + stock springs.Ps rotors.Subframe bushings.Weichers fstruut.Finally mods sdiff and raceland dp.
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      12-22-2009, 05:54 PM   #6
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Quote:
Originally Posted by fourtailpipes View Post
what i think you're describing are standard effects of installing a stiffer rear bar. you'll adjust your driving habits to accomodate the more abrupt oversteer, but unweighting of the inside tire caused by the bigger rear bar may be problematic with this differential.
Exactly a very stiff rear sway bar transfers more load to the outside tire which causes the inside tire to lose traction. What you are describing is a classic problem with open diff cars when adding a stiff sway. Either you can install a softer bar, like he said adjust your driving style, or do something with the diff.
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      12-22-2009, 10:34 PM   #7
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there are two things happening with a stiffer rear swaybar:

1. there's a dynamic change in the way the chassis will behave. this will have effects while turning, regardless of throttle angle or braking; generally increasing oversteer tendencies. adjustment of your driving technique addresses this.

2. through the unweighting of the inside tire, on an open differential car, application of the throttle can be problematic. there are no easy fixes for his issue, aside from switching to a softer swaybar, or accelerating more gently from turns while significantly laterally loaded.
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      12-23-2009, 01:39 AM   #8
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I would just remove it and return it. JMHO
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      12-23-2009, 06:01 AM   #9
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I have drive more time and i like one little more.

I hope that my problem will reduced whit the install of suspension.
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135ijb3, h & r filter, SSK, CDV,clutch stop, klracing fmic,seccond catted ,225-255 michelin ps3, E93F-E92R swaybars.M3 parts front.M3 tension rear.Plates mod(F-2,0º R-1,5º).Bilstein + stock springs.Ps rotors.Subframe bushings.Weichers fstruut.Finally mods sdiff and raceland dp.
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      12-27-2009, 09:24 PM   #10
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Quote:
Originally Posted by vitig View Post
I have the e93 front swaybar that give me a good reduced of body rolling.The rear of the car still had sway and i decided install the e92 swaybar, whit this installed the body rolling is disappear, but i have two problems:

1. The car less very much traction when one tyre support more than the other tyre (i only drive in wet road).
2. The rear of the car is more abrupt when you look for drift,before install the rear bar the rear of the car was inclined and next drift progressive.Now is more easy to extend the drift but in the begining is abrupt.This problem i think that is probably maked for my habit whit the car before install it.

In chassis only have this bars and the good year asymetric no runflat.I have ordered bilstein b8 shocks(30 days to delivery) and eibach pro kit springs(this arrived yesterday).This combo , do it solve my problems? or i want a lsd?.
Is better that i mount now the springs or wait to the shocks to mount all?.
With your engine mods, LSD for sure. The 1 is severely tire limited.
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