Why Do I Need A Mustang Bumpsteer Kit?

Kevin Cassar
March 5, 2020

Mustan Bumpsteer Kit Benefits

No matter what Mustang enthusiast you ask, one of the first things they will tell you is they’ll want to lower their Mustang suspension. A common misconception is that when you add a set of lowering springs or coilovers you won’t need anything other than an alignment to complete the job. That is not always the case! Bumpsteer can come into effect when modifying your suspension due to the geometric suspension inconsistencies that weren’t intended from the manufacturer. And a bumpsteer kits is the perfect solution for this!

What Is Bumpsteer?

Orange Fury Shelby GT350R

Bumpsteer is the effect when there is a change in suspension geometry angles as the suspension is compressing and decompressing. The root cause of bump-steer has to do with the toe-in and toe-out with the alignment of your suspension. As the suspension in your Mustang moves up and down there can be slight variations of change in the toe, this is also known as “steering”. Causes of this can be from worn suspension components, improper alignment, road conditions, and hard cornering.

This is a huge problem for enthusiasts for reasons like:

  1. When in hard cornering it can cause the suspension to act uncharacteristically by the suspension pushing the front end harder than actual driver input.
  2. Your Mustang will tend to steer itself due to the inaccuracy of the suspension alignment and condition of suspension components.
  3. It can have long-lasting effects on the suspension over time. In turn, this can actually become very dangerous to drive your Mustang under certain scenarios such as racing and hard-driving.

What Are The Main Causes of Bumpsteer?

Oxford White Shelby GT350

As you’re driving your Mustang down a straight road, the suspension will likely not go up and down as it is designed to do so, due to alignment inconsistencies. When bump-steer occurs, your Mustang's wheels will follow a curving path. What this will do is push the front wheels inward or towards the center of the Mustang while the suspension is moving up and down.

As you’re driving down your favorite backroad the outer tie-rod end (this is connected to your steering rack, then connects to your steering column) will move in and out in an arc type fashion as the suspension is compressing. When this occurs, the tie-rod end rate can change, if the rate is not the same as the outer tie-rod arcs, it will not match the wheel as it moves in or out.

One thing is the key area to know is that if you’re planning on modifying your suspension in any way, bump-steer is going to be an issue that will come about sooner or later. Even if you are to add in Steeda Caster Camber Plates, that won’t solve your problem.

How to Fix Mustang Bump-Steer

In order to fix your Mustang bump-steer issue, there are a few things that are needed to be followed:

  1. You need to find the center point of the arc of the wheel. This is known as the instant-center point and is controlled directly through the suspension moving link points.
  2. Locate each of the suspension arcs on each moving point.

Once these are located, you then will be able to eliminate bump-steer. Bump-steer can be eliminated each of the centers and the length center points of each arc must be the exact same. But, it is key to note that the ride height of your Mustang will adjust the instant center. Bump-steer can’t eliminate the overall range of suspension travel. In order to completely resolve this issue, you will need to change the length of the tie-rod end to be similar to the steering rack.

Toe-in or out describes the alignment in the front wheels and tires of your Mustang. When you are bringing the toe-in, that means you are bringing the front wheels inward than you would in the rear of the Mustang. Finally, by adding a Steeda Bumpsteer Kit, you will be adding a much more rigid, adjustable tie rod end to the steering rack. Which will virtually eliminate the issue of suspension deflection! It will give your Mustang tighter, more predictable feedback in the steering and the result will be better input when going around your favorite autocross, track, or backroad.

Check out the complete systems components in the graphic below!

mustang bump steer suspension graphic




Back to TOP
0 Items