Tramlining/Bump Steer Fix?

[D/\rK•650]

Will this kit fix the tramlining that happens on my dark horse? Anyone have this installed to fix tramlining on non lowered stock horse? Is bumpsteer the same as tramlining? Mine is stock but I want to try and fix the tramlining, it can be a bit much to handle.
https://www.steeda.com/steeda-555-8179-s650-mustang-bumpsteer-kit
or any other bumpsteer kit.

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[Yamazuki]

Bump steer is not the same as Tramlining.

Putting the car in sport mode or throwing a set of Pilot Sport 4s's on will pretty much eliminate any tramlining issues you have.

 

[Sofa King]

Tramlining is usually due to wide grippy front tires...

 

[GooberDH]

Bump steer is not the same as Tramlining.

Putting the car in sport mode or throwing a set of Pilot Sport 4s's on will pretty much eliminate any tramlining issues you have.

I agree. Tramlining almost totally gone with PS4S vs Trofeos. Same deal when I switched from PZeros to PS4S on my last car. Michelin is just an all around superior tire, Ford must've gotten a screemin deal with Pirelli to slap them on Mustangs.

 

[Ken H.]

My understanding of bump steer is when you hit a bump, the car will veer to one side or the other.
Tramlining is the tires reacting to irregularities or grooves/ridges in the road surface & pulling the car to either side.
I’m not an expert. Open to correction if I’m off.

 

[Garcia172]

Tramlining is usually due to wide grippy front tires...

And alignment

 

[LouG]

Bump steer is when the wheels deflect laterally as the suspension moves through its travel.
Tramlining is great fun on a bike....not!

 

[Garcia172]

My understanding of bump steer is when you hit a bump, the car will veer to one side or the other.
Tramlining is the tires reacting to irregularities or grooves/ridges in the road surface & pulling the car to either side.
I’m not an expert. Open to correction if I’m off.

Bump steer is when the alignment of the suspension changes when the wheel moves through it's travel arc. It can cause the wheel to toe-in or toe-out when the suspension moves. This is normal for all suspensions.

The amount of bump steer typically increases the more the wheel moves through it's arc (the toe-in or toe-out quantity is not linear through it's range... ).

The geometry of the suspension is optimized by the factory for a factory ride height. Which means, that given the known amount of suspension bump steer in each directions (compression vs extension), the ride height (and the suspension mounting points) are set to the "middle" of the bump steer range... meaning you get the least amount of bump steer on the initial movement in both directions (compression & extension).

When you lower the car, you now put the wheel in the arc where there is more bump steer per inch of compression than there would be non-lowered.

The fix is to realign the tie rod and the ball joint-to-control arm... by lowering those connection points to put them back in their original positions (angles). (Different suspension types have different quantity of mounting points.

Not sure about Mustangs... but I'm sure there are several kits out there to correct for this. Typically it's not expensive but requires some labor and an alignment.

It's easy to visualize with a simple McPherson strut setup... in that case, you would get a tie rod lowering mount... same for the ball joints... thus putting the control arm and tie rod back parallel to each other and level.

A lot of generalizations here because there are so many different suspension configurations but the concept is still the same.

 

[Garcia172]

Will this kit fix the tramlining that happens on my dark horse? Anyone have this installed to fix tramlining on non lowered stock horse? Is bumpsteer the same as tramlining? Mine is stock but I want to try and fix the tramlining, it can be a bit much to handle.
https://www.steeda.com/steeda-555-8179-s650-mustang-bumpsteer-kit
or any other bumpsteer kit.

Is the car lowered? If not... then no. Check alignment & tires & tire pressures.

 

[Silverstone]

Does your DH have lane keep assist? Is it on or off when you experience what you describe as tramlining?

 

[D/\rK•650]

I leave lane keeping/assist off. All off except emergency braking. It seems to be worse than im remembering last few times I drove that is. It seems like tramlining would be same effect as bumpsteer in the video steeda he says when car hits bumps it goes in direction of bump? Maybe im not understanding. Whatever I'll just wait see if it's better or gone with new tires.

Thank you all for your feedback

 

[Garcia172]

I leave lane keeping/assist off. All off except emergency braking. It seems to be worse than im remembering last few times I drove that is. It seems like tramlining would be same effect as bumpsteer in the video steeda he says when car hits bumps it goes in direction of bump? Maybe im not understanding. Whatever I'll just wait see if it's better or gone with new tires.

Thank you all for your feedback

Get the alignment checked.

 

[D/\rK•650]

Get the alignment checked.

Roger that. Next oil change having it checked.

 

[Garcia172]

Is the car lowered? If not... then no. If yes... still no. It's a bump-steer geometry correction kit.

If you lower the car, then you would use this kit or a similar kit to get the geometry back to stock to minimize the bump-steer.


Check alignment & tires & tire pressures.

 

[Garcia172]

Roger that. Next oil change having it checked.

... And inspect the tires for abnormal wear.

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