Rear swaying at high speeds... - Mustang Evolution

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Old 11-22-2014, 06:33 AM   #1
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Rear swaying at high speeds...

So I just installed upr adjustable upper control arm and lower control arms with bmr relocation brackets. Yesterday I realized the rear will sway pretty bad at high speeds. Anyone know what this issue could be?


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Old 11-22-2014, 07:32 AM   #2
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Define high speeds? Going straight or turning?
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Old 11-22-2014, 07:33 AM   #3
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Define high speeds? Going straight or turning?

Straight around 100mph


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Old 11-22-2014, 07:42 AM   #4
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Do you still have front sway bar?
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Old 11-22-2014, 07:45 AM   #5
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Do you still have front sway bar?

Yeah still have front and rear sway bars. Thinking maybe something todo with the uca maybe my shop that installed it didn't adjust it right? Or I do I have coilovers on the car so maybe they are to stiff in the rear?


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Old 11-22-2014, 08:12 AM   #6
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Check the gaps between the rear tires and the front edge of the wheel-wells on both sides with a ruler. If they are not within 1/8" of each other, it will cause the rear end to wander as you described. Some with the BMR brackets have noticed a difference in this measurement after their install as well. If this is your case, contact Kelly at BMR and he will help you fix it. Don't worry about your UCA, it only controls the pinion angle.
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Old 11-22-2014, 08:13 AM   #7
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Yep. Too stiff of rears with your rear sway would cause induced oversteer. Soften them up. Besides, for drag you want them soft for weight transfer. Make sense?
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Old 11-22-2014, 09:27 AM   #8
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Yep. Too stiff of rears with your rear sway would cause induced oversteer. Soften them up. Besides, for drag you want them soft for weight transfer. Make sense?

Ok I'll try to soften them up and see if that helps


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Old 11-22-2014, 10:08 AM   #9
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Bill,

I run my strange struts 2 clicks from full soft in the front and my shocks 7 clicks from full soft in the rear. This is for the strip. You want it firm in the rear not soft. On the street I run full soft in the front and half way (5 clicks from full soft) in the rear.
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Old 11-22-2014, 10:15 AM   #10
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Bill,

I run my strange struts 2 clicks from full soft in the front and my shocks 7 clicks from full soft in the rear. This is for the strip. You want it firm in the rear not soft. On the street I run full soft in the front and half way (5 clicks from full soft) in the rear.

I have them stiff all 4 corners right not I'll make some adjustments and see if it helps


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Old 11-22-2014, 10:20 PM   #11
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are your lower arms adjustable? With relocation brackets you should be using adjustable imo. Relocation brackets can be off and the adjustable LCA can make up the difference. Since this became an issue with the install check axle alignment. Good luck!
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