Alignment Issues

[K0094]

I have a 2019 Mustang Bullitt with the magneride suspension, 14,000 miles.
I seem to have an alignment issue or something else going on as the car tends to tramline or try to steer itself on relatively smooth interstate. I feel like i need to use two hands on the wheel when changing lanes, crossing over the center stripe/crest of the interstate at 70-80mph. It is a little unnerving really. I don't recall having another car handle so bad on the interstate. I don't notice the issue as much on a twisty two lane road, but i definitely haven't pushed it with my highway driving experiences. The rubber bushings in the rear suspension look ok, no cracking/splitting. Rear wheel bearings don't have play in them either. The handling also seems worse in sport mode when the shocks stiffen up as compared to normal mode. I don't think the nuts on the rear hubs have ever been removed. Tires are Michelin 4s, set at 32psi.
I took the car to a local Ford dealer and they couldn't find anything wrong in the suspenion componets. They did an alignment, and it made the problem worse as the car would then almost dart when changing lanes on the highway. I took it back to the dealer, they redid the alignment and the car drives a little better, but something still isn't right. The last alignment is attached and looks to be in the specs outlined in the manual. I have been looking at some of the BMR suspension upgrades. I wish Ford would quit using the cam bolts.

What are the best alignment specs for street driving (not planning on driving this car on the track)?
I believe the bullitt falls under the PP1 alignment specs (not sure if the PP2 is different specs then the PP1)?

Thank you for any help.

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[Sparky1337]

Are the tires original? They might be a little on the hard side if they are.

I’ve always found the S550 chassis is grabby and trams more than any other car I’ve had.

Your printout looks fine though. Have you used the comfort mode on the steering wheel? I’ve found that helps on rougher roads.

 

[DAVECS1]

You need more front toe in to slow down the reaction time of the front end. More caster would usually help but that looks to be all the way adjusted. Set each front wheel to .15 degrees positive with a total between the two wheels at .30 degrees. It will feel much better on the street. Not sure if you are running stock wheels but keeping the wheel diameter stock and the front tire size lower than 285 will also help.

 

[WItoTX]

Do you have camber plates or another way to adjust camber? If not, I'd say that alignment is crap, and I wouldn't go back there.

If you are bone stock, your front camber shouldn't change. I'm pretty certain the bullit doesn't have camber plates stock.

 

[petronix]

Your toe is incorrect both front and rear. Toe out out front (as you have evident with negative values) will cause the car to want to dart around and wear out the inside wheel tread. The rear does not have enough toe in either, which can cause the car to want to spin.

Toe values should be postive for toe in, not negative for toe out.
Front toe should be .01 on each side for a total of .02
Rear toe should be .12 on each side for a total of .24

 

[Sparky1337]

Unless ford changed the specs in 2019 they listed -0.010 to +0.020 for the Shelby spec

 

[DAVECS1]

Toe out is twitchy, period. Most street cars run a fair amount of toe in as it accommodates most drivers even if it is not the most performance orientated. 1.5 degrees of camber is fine for the street and really will not affect twitchiness.

 

[K0094]

Thanks, I appreciate your feedback.

The suspension is totally bone stock at this point and it does not have camber plates. I was also considering adding some camber plates.

 

[GrabberBargeCaptain]

I run that amount of toe out (that's a very small amount) to give the steering a bit of immediacy and i don't have any tramlining issues, except sometimes when i pass on double yellow and go over those lane dividers the car can feel a bit jerky.

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