front bump steer kit needed?
10-10-2012, 09:24 PM
#1
front bump steer kit needed?
i just lowered my car on some eibach r2.
currently at 1 finger gap front and rear.
do you think i need a front bump steer kit? i currently have front roll center adjusters on as well as offset ball joints.
i do have a rear bump steer kit
currently at 1 finger gap front and rear.
do you think i need a front bump steer kit? i currently have front roll center adjusters on as well as offset ball joints.
i do have a rear bump steer kit
10-10-2012, 11:51 PM
#3
i am not sure if you consider this bump steer.
ex. driving around button willow, the car hits a small bumps in the road and the steering wheel moves around somewhat and has some play which makes it feel unstable. This happens to me when i am driving towards riverside which scares me to push it more through the turn.
this was with stock suspension on a car with 135k.
i just put the r2 in and havent driven it on the track yet.
ex. driving around button willow, the car hits a small bumps in the road and the steering wheel moves around somewhat and has some play which makes it feel unstable. This happens to me when i am driving towards riverside which scares me to push it more through the turn.
this was with stock suspension on a car with 135k.
i just put the r2 in and havent driven it on the track yet.
10-11-2012, 05:40 AM
#4
Former Moderator
boyguan, what you are describing probably isn't bump steer, just steering feedback. Better suspension or suspension settings will improve the feel over the bumps and allow more confidence.
I installed a front bump steer kit because it was cheap and easy and I was already taking points for the rear bump steer kit. I didn't notice a difference in handling but it can't hurt.
Megan Racing Front Bump Steer Kit for the S2000
Here's the theory: As the front suspension moves up and down the toe changes. This toe change can be pretty severe in some cars but the S2000 seems to have pretty good suspension geometry up front so we don't get a lot of toe change. Normally you get toe-out both ways--with suspension compression and extension. The toe change typically gets more severe as you move through the suspension arc so you get the least bump steer when the suspension and steering arms are horizontal.
When you lower your car the steering arms have to angle downward to the steering rack. The problem is now the toe curve is jacked--you can end up with toe out on compression but get toe in on extension (initially anyway).
A front bump steer kit simply shims the steering rack higher to get the steering arms back to horizontal and place the toe curve back to (or near) stock.
Here's the how-to for installation: http://robrobinette....00FrontBump.htm
I installed a front bump steer kit because it was cheap and easy and I was already taking points for the rear bump steer kit. I didn't notice a difference in handling but it can't hurt.
Megan Racing Front Bump Steer Kit for the S2000
Here's the theory: As the front suspension moves up and down the toe changes. This toe change can be pretty severe in some cars but the S2000 seems to have pretty good suspension geometry up front so we don't get a lot of toe change. Normally you get toe-out both ways--with suspension compression and extension. The toe change typically gets more severe as you move through the suspension arc so you get the least bump steer when the suspension and steering arms are horizontal.
When you lower your car the steering arms have to angle downward to the steering rack. The problem is now the toe curve is jacked--you can end up with toe out on compression but get toe in on extension (initially anyway).
A front bump steer kit simply shims the steering rack higher to get the steering arms back to horizontal and place the toe curve back to (or near) stock.
Here's the how-to for installation: http://robrobinette....00FrontBump.htm
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