The FFR bump steer kit works, but sometimes you also need offset rack bushings. It depends on your specific setup. The FFR bumpsteer kit simply allows you to put the rod-end on top or bottom of the spindle arm and you can also use spacers if needed. Sometimes the best place for the rod-end is right in the center of the spindle arm, which is why you need the offset rack bushings to move the rack either up or down.

craig

 

Todd, can you clarify your question a little?
Bump steer is not going to have any effect on a smooth, level road where the suspension is not moving up and down.
Bump steer causes the front wheels to turn right or left as the suspension is deflecting or rebounding.
Are you talking about how the car doesn't self-center very well?
I'm not gonna pass myself off as a front suspension expert but the tendency of the car to take a track and not come back, or not self-center real well after a turn is affected by caster. Less caster makes the car more responsive but it also makes you have to pay more attention to direction. The way a sports car ought to be.
In aircraft terms, you have a less stable set-up with less caster. It's great for quick, responsive handling but it takes more attention to drive.
The alternative is a more stable platform that's not as responsive.
There's always a compromise!! darn it.

d.

 

Donald the question was two part.

with how well does the bump steer kits work when going over the bumps do they eliminate 50% 90%? of the bump steer felt.

And the second does it help make the car handle better out on the race track or a smooth surface or is the end result better tracking over bumpy roads.

If you were on a perfectly smooth road all the time would a bump steer kit help handling?

Thanks

Todd

 

Todd - The Bumpsteer kit is not just something that you bolt on and it works. It is something that allows you to adjust the amount of TOE change for a given amount of front suspension movement.

If all roads were smooth as a babies butt and you never took corners hard enough to cause the car to exhibit any body roll - you do not need a bumpsteer kit.

On the other hand, if you want to do any performance driving of your car and still have a streetable front suspension, you should really consider a bumpsteer kit.

You adjust your bump steer by either removing the front spring or adjusting a lot of slack into the coil over adjuster and jacking the lower control arm up and down while watching the amount of toe change the spindle goes through. If you put shims between the spindle control arm and the rod-end in the bump steer kit, you will alter how much bump steer you get in the car. The best thing to do is to adjust your car so that when it is loaded, the lower control arm is level (parallel) to the ground. When the suspension is compressed (bump) you want there to be very little arc in the tie-rod that will cause the spindle to move.

Bump Steer - just consider this as the last step of your front end alignment. Just because you bolted the control arms to the chassis and the IFS to the spindles to the upper control arms, it does not mean that the front end is in alignment.
Same thing with the bump steer kit. It is something that needs to be adjusted in order to make it work right. Just because Joe-Blow used 1/4" of shims on the left and 3/8" shim on the right - does not mean that it will work on your car. A lot depends upon the springs, wheel/tire combo, alignment, ride height and weight of driver / passenger.

 

Quoted by Todd:
If you were on a perfectly smooth road all the time would a bump steer kit help handling?

Yes it would. If you have toe-in bumpsteer, when you make a hard corner, the car will want to turn more than what you are feeding into the steering wheel. This happens because your outside tire turns in when the suspension compresses.

hope this helps,

craig