IS F (2008-2014) Discussion topics related to the IS F model

Steering is "squirmy" under heavy braking

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Old 04-05-16, 06:54 PM
  #16  
Sameer89
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Yeah, I am planning to order the USRS from Josh once they're back in stock at RRR. Can't wait!
Old 04-05-16, 07:01 PM
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Our Ultimate Steering Response System (USRS) is not just a replacement bushing, it is a thrust loaded bushing + housing system. The thrust loaded washer keeps the lower control arm from migrating backwards during hard braking, significantly reducing dynamic toe changes.

-Rafi



RR Racing Ultimate Steering Response System (USRS)


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Old 04-05-16, 07:04 PM
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STLblueF
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Another +1 for the Rr-racing USRS. I noticed immediately that it eliminates the symptoms you experienced. It's a very solid option.
Old 04-05-16, 08:21 PM
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wmjeffreyw
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Had the exact same issue, installed the RR Racing USRS, no longer noticeable.
Old 04-05-16, 10:45 PM
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blackisF08
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mine started doing that after installing the lca bushings but i am pretty sure it is because i need an alignment, i will post my results after installing new summer wheels and tires as well as my alignment
Old 04-07-16, 07:44 AM
  #21  
FIGS
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The front LCA is one cause, the rear toe sweep is another. That is why we bundle our suggested parts into an Essential kit. The rear toe sweep was worst in the 08-10 models and will cause inadvertent steering when the suspension compresses. We lengthen the Toe link to reduce this phenomenon and create stability throughout the new travel stroke of a lowered vehicle and allow lengthening of the rear LCA to add more grip as well as replacing the inner bushing with a spherical rod end. The spherical rod end allows instant suspension location and increases shock efficiency because it no longer needs to fight the bushing every time the suspension cycles. These parts have been available since 2009 and we have a lot of setup data that is proven in a wide variety of applications.


essential kit for lowering includes front LCA bushing, rear adjustable LCA and toe links.<br/>http://www.shopfigs.com/v1/index.php...product_id=162

The caster and camber gain up front are significant( around 1 degree per 1") as is so we do not feel additional caster is immediately required plus it will stress the #1 bushing which has little lateral compliance. If you are going to change the control arm angle and pivot about the front #1 bushing, We suggest replacing the swaged collar factory bushing with out poly bushings which allow for misalignment.




http://www.shopfigs.com/v1/index.php...product_id=286

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Old 04-07-16, 10:19 AM
  #22  
SubOrbital
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Do you make any of the arms with poly busings for wimps?
Old 04-07-16, 12:54 PM
  #23  
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Originally Posted by SubOrbital
Do you make any of the arms with poly busings for wimps?
The subframe soaks up so much of the nvh coupled to the chassis you will not feel any consequence from the solid spherical bearings. We do have factory replacement poly bushings you can use to gain the free rotation without the gross adjustment.
http://www.shopfigs.com/v1/index.php...product_id=112

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Old 04-07-16, 03:09 PM
  #24  
I8ABMR
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To the OP Id say replace the LCA bushings and get a good alignment and check tire pressures
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