Tornado bump steer

[Darren C]

Hi
Having completed all of the mechanical and cosmetic bits on my car, I thought I'd treat her to a professional suspension setup as the handling has significantly deteriorated since she was lowered (she handled OK, but not brilliantly before)

The chap I took it to prepares race cars for the rich and famous, so he knows his onions. Whilst we managed to correct quite a few things and dramatically improve the handling of the car, she still suffers from significant bump steer. Under load, the wheels point out.

As lowering the steering rack isn't an option without cutting the chassis, he suggested that we change the track rod ends to a rose joint system that will allow the pivot point to be positioned higher relative to the upright. This corrects the geometry and allows the track rods to run parallel to the wishbones, which at present they don't (hence the problem).

Does anybody know if such a kit exists, and what it's called? If not, the chap can fabricate the parts, but we thought it worth asking first.

Any help would be gratefully received!

Darren

 

[Joe]

Hi Darren, I haven't used such a kit before, but, I did find one on summitracingdotcom for 2015 Mustangs. It is a Steeda Bump Steer Kit, part #555-8133. I know the included washers are used to position the rod end in the correct vertical position, as needed.

Joe

 

[Brian Kissel]

More info from Steedas webpage.



If you have substantially lowered your vehicle chances are you have introduced bumpsteer. What is bump steer? Bumpsteer is changes in toe caused by suspension movement.

Every car has bumpsteer, however when you lower the vehicle you increase the amount of bumpsteer that occurs, if this becomes excessive you will begin to notice some unwanted vehicle driving characteristics. When you turn your steering wheel you are essentially changing the toe of the wheels to turn the vehicle.

Excessive bumpsteer is undesirable because it introduces unwanted steering inputs which means the suspension is steering the car instead of the driver. If your car is lowered and has tracking issues and less predictable steering behavior, you need a Steeda S550 Mustang Bumpsteer Kit for your 2015-2016 Mustang GT, EcoBoost, or V6.

Steeda S550 Mustang Bumpsteer Kit for your 2015 Mustang GT, EcoBoost, or V6 will allow you to correct your bumpsteer geometry and can do so without requiring you to drill or modify your vehicle spindle. In addition, our Steeda S550 Mustang Bumpsteer Kit makes a great service replacement for your worn out, high mileage outer tie rods even if you do not have excessive bumpsteer issues.

Pick up a Steeda S550 Mustang Bumpsteer Kit for your 2015-2016 Mustang GT, EcoBoost, or V6 today and refresh your outer tie rods and improve your steering.







Note: Will not clear 16" wheels.










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[Darren C]

Thanks guys

It looks like this type of kit is more readily available in the US than over here.

I will probably get the bits fabricated so that I can match all of the various threads and tapers. Has anybody else already done this?

Darren

 

[Frank Catt]

It all depends on which ( Tornado supplied? ) front uprights / suspension units you have fitted.

 

[mark b.]

Here's where I sourced my parts for a different build. Wonder how metric/US stuff is going to cross over. Different ride heights are going to require different bump steer adjustment fyi.

Bumpsteer Sleeves

Steering
They make a really nice steering rack btw.

Free Shipping @ Speedway Motors, The Racing and Rodding Specialists

 

[Dr. Bob Woods]

Darren,

My Tornado had significant bump steer too. There are a few ways to correct bump steer.

1. Raise or lower the rack. You want the tie rod to be along the line to the instant center of the A-arms. You could also raise or lower the outer tie rod ball joint (not as easy).

2. Increase or decrease the length of the rack. The inner tie rod ball joint should be close to the line between the inner suspension ball joints. This is probably the easiest fix for you. This is what I am going to do.

Getting both 1 & 2 right should fix your problem.

I don't know that bump steer kits for a Mustang will directly apply to your car parts.

-Bob Woods
Tornado GT40 in Texas