Rear swaybar setting question

[Justgonna send it]

this is on a 2019 GT on boost

I just purchased an adjustable rear swaybar but I’m not sure what setting is best for just street driving. Any suggestions?

Its not tracked at all just street mostly, I’m just getting body roll that I’m not happy with

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[GrabberBargeCaptain]

Soft. Even on soft it will be much stiffer than stock anyway

 

[Dana Pants]

Do not do this. Making the rear roll stiffness higher just makes the Mustang more oversteering, murderous, and unforgiving. Which doesn’t sound like your goal.

 

[Five_OhGT]

I set my Rear to middle and front to soft, it made a huge difference in handling

 

[NightmareMoon]

For a boosted car, do the front bar to correct body roll. You dont want extra rear stiffness unless you are into a handling oriented build, and even then starting with a front bar is probably what I’d recommend.


You loose grip on whatever end you stiffen first. Bars are good for increasing the suspension reaction time, and thry help you both get into trouble faster and get out of trouble faster, but just adding a rear bar makes the car very tail happy on power corner exits.

 

[Justgonna send it]

For a boosted car, do the front bar to correct body roll. You dont want extra rear stiffness unless you are into a handling oriented build, and even then starting with a front bar is probably what I’d recommend.


You loose grip on whatever end you stiffen first. Bars are good for increasing the suspension reaction time, and thry help you both get into trouble faster and get out of trouble faster, but just adding a rear bar makes the car very tail happy on power corner exits.

well dang. Sound like i purchased the wrong bar then. (Rear only). Thanks for the info

 

[Justgonna send it]

So your saying unless i do the front bar done worry about doing the rear?

 

[John S]

+1 on NightmareMoon's comment. Making the rear too "stiff" will promote oversteer with a rear end just waiting to spin out before you can catch it.

 

[GrabberBargeCaptain]

So your saying unless i do the front bar done worry about doing the rear?

I mean are you trying to get your car to oversteer? Because adding a stiff bar only in the rear is how you do that.

 

[Cpcloud]

What spring rates are you running?

What youre describing sounds like a front end sway bar adjustment.

Also, how low are you? Did you correct for bumpsteer?

 

[NightmareMoon]

So your saying unless i do the front bar done worry about doing the rear?

Well unless you just want the rear to dance around, correct, just do the front or do both. If the front is stiffer it will tolerate some additional rear stiffness.

But a lot of the aftermarket rear bars are kinda too stiff even when paired with a good front bar. Steedas competition rear bar is /less/ stiff IIRC.

Heres the thing. Rear bars are about as easy of a swap as it gets. The four bolts holding the mounts are readily accessible with hand tools and the endlink attachments are also easy to access and zip on/off with a wrench and a power driver, so there is little wasted time trying it out if you already have the box open. Start with the soft setting and see how you like it. If you dont love it its trivial to put the OEM bar back on.

Changing the front OTOH is a commitment, but IMHO if you just want to flatten it in general, the rear bar was the wrong choice considering with a blower you probably need all the rear grip you can get.

If you buy a front you might be able to run both, it just depends on what you want and you may still find that the rear is too stiff.

You really don’t need aftermarket bars on the street unless you’re trying to fine tune the oversteer understeer balance and/or you live in the 1% of olaces which have one single spot where the road switches back so fast a bar will help it transition. I do like a front bar for highway lane change responsiveness, but not a rear for that reason. Flatter body roll isnt a good reason IMHO, the car is already pretty flat and that small amount body roll is good feedback for the driver as to what the chassis weight is doing. Flatter doesnt mean less weight transfer its just less signs of weight transfer.

If you’re tracking or autocrossing then there are good reasons to try a rear bar setup to intentionally get the rear to dance more, but you are going to be sawing the wheel coming out of corners trying to keep the nose leading the tail and not vice versa.

 

[Roadsign]

Good advice from Dana Pants and NightmareMoon.

If you do decide to try the rear bar only, be aware that for slow/low speed cornering the car will rotate more and you may be tempted to think it's handling better. Just know this rotation will increase exponentially(much more so than linearly) as speed increases.

 

[jayvicious]

Well unless you just want the rear to dance around, correct, just do the front or do both. If the front is stiffer it will tolerate some additional rear stiffness.

But a lot of the aftermarket rear bars are kinda too stiff even when paired with a good front bar. Steedas competition rear bar is /less/ stiff IIRC.

Heres the thing. Rear bars are about as easy of a swap as it gets. The four bolts holding the mounts are readily accessible with hand tools and the endlink attachments are also easy to access and zip on/off with a wrench and a power driver, so there is little wasted time trying it out if you already have the box open. Start with the soft setting and see how you like it. If you dont love it its trivial to put the OEM bar back on.

Changing the front OTOH is a commitment, but IMHO if you just want to flatten it in general, the rear bar was the wrong choice considering with a blower you probably need all the rear grip you can get.

If you buy a front you might be able to run both, it just depends on what you want and you may still find that the rear is too stiff.

You really don’t need aftermarket bars on the street unless you’re trying to fine tune the oversteer understeer balance and/or you live in the 1% of olaces which have one single spot where the road switches back so fast a bar will help it transition. I do like a front bar for highway lane change responsiveness, but not a rear for that reason. Flatter body roll isnt a good reason IMHO, the car is already pretty flat and that small amount body roll is good feedback for the driver as to what the chassis weight is doing. Flatter doesnt mean less weight transfer its just less signs of weight transfer.

If you’re tracking or autocrossing then there are good reasons to try a rear bar setup to intentionally get the rear to dance more, but you are going to be sawing the wheel coming out of corners trying to keep the nose leading the tail and not vice versa.

Good advice from Dana Pants and NightmareMoon.

If you do decide to try the rear bar only, be aware that for slow/low speed cornering the car will rotate more and you may be tempted to think it's handling better. Just know this rotation will increase exponentially(much more so than linearly) as speed increases.

I'm trying to process, OP mention bout rear swaybar and i know it will impact the driveability. How about Rear Lower Bar or known as lower brace or tie-bar meant to improve rear chassis stiffness. Does it help in any ways for daily drive? I just purchased it for some reason from chatgpt.

• It bolts between the lower suspension mounting points (the “lower wishbone” or lower control arms) to the vehicle’s chassis/subframe
• It’s designed to reduce flex in the chassis, especially under hard cornering, braking, acceleration, or when going over bumps. This helps maintain better alignment of suspension geometry (camber, etc.), improving handling and stability.

 

[NightmareMoon]

I'm trying to process, OP mention bout rear swaybar and i know it will impact the driveability. How about Rear Lower Bar or known as lower brace or tie-bar meant to improve rear chassis stiffness. Does it help in any ways for daily drive? I just purchased it for some reason from chatgpt.

• It bolts between the lower suspension mounting points (the “lower wishbone” or lower control arms) to the vehicle’s chassis/subframe
• It’s designed to reduce flex in the chassis, especially under hard cornering, braking, acceleration, or when going over bumps. This helps maintain better alignment of suspension geometry (camber, etc.), improving handling and stability.

Most people do like those braces. Some of us don't really think they're the right fix and question the necessity of that extra stuff. The pro is when the car does break loose it might feel a little smoother. I was more noticeable on the 15-18 cars. Ford actually changed some things in the 2019+ cars which made it less important.

You're letting chatGPT spend your money for you? That seems... questionable.

 

[jayvicious]

Most people do like those braces. Some of us don't really think they're the right fix and question the necessity of that extra stuff. The pro is when the car does break loose it might feel a little smoother. I was more noticeable on the 15-18 cars. Ford actually changed some things in the 2019+ cars which made it less important.

You're letting chatGPT spend your money for you? That seems... questionable.

I was asking for an extra opinion since the shop had the Front Strut Bar which i was looking for

So is it a good thing to put, yay or nay? @NightmareMoon

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