Dartiness?

[Tony Alonso]

What tires come stock on the EB with Performance Pack? Are they Pirelli P Zero's?

Yes, in 255/40-19 size (list of tires and sizes for models here).

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[Rob00GT]

I came from a slew of FWD cars (pretty gross things, like a Saturn SC2, Scion TC, and C-Max Hybrid), and I do a ton of freeway driving. Those cars tended to be pretty planted to the road and didn't need to be babysat to stay in the lane as much.

Keep in mind the cars that you're used to are designed for the lowest common denominator of driver. They will plod ahead in a straight line under almost any circumstances. A Mustang, for lack of a better term coming to mind, is more of a "driver's car" with livelier steering and much quicker response to your commands.

It may take a little getting used to, but after a year you won't be able to go back to FWD cars.

 

[defdans]

I actually was noticing the same thing yesterday. Glad to hear i'm not alone. I'm not really worried about it.

 

[cush]

Hrmmm...I think you just solved my problem, Ecobeast, even though you didn't know it!

I just checked my tire pressure via TPMS, and they're at 36. It's about 40F right now, and they should be about 32. I think I'm going to let some air out tomorrow morning before I go anywhere and check with a real pressure gauge, but this now seems to be a case of over-pressured tires (from the dealer).

Make sure you use that "Real Pressure Gauge" you mentioned, my experience with TPMS is that they all read a bit off, my Nissan goes in the opposite direction TPMS reads 32 PSI, and multiple hand held gauges read 36 or 37 PSI. Your Mustang could be reading higher than reality. Having said that, I guess should check mine with a hand held...

 

[jimijammer]

I came from a slew of FWD cars (pretty gross things, like a Saturn SC2, Scion TC, and C-Max Hybrid), and I do a ton of freeway driving. Those cars tended to be pretty planted to the road and didn't need to be babysat to stay in the lane as much.

My EB PP seems to be "darty." I don't know if that's the the right term, but I seem to have to constantly input steering to keep it going straight. I usually keep it in "sport" steering mode as it helps a bit and I like the feel.

Is this a common thing for this car or RWD cars in general? It tracks straight on flat (un-cambered) roads, but it's almost like it responds too well to road camber.

I'm not complaining though. I LOVE LOVE LOVE this car!

A lot of good comments here, but "sport" steering mode might be part of the problem. I only use it when I want more feedback on curvy roads. The Normal or even Comfort settings has a little more play and less resistance to steering input giving a less 'darty" feel. Just an observation, you may have already tried that. Tire width/type/pressure as well as some roads condition play a role...so...all of the above ;-)

 

[evildronepilot]

I just checked and corrected the cold tire pressure. It's 38 degrees outside, and my analog meter correlated with TPMS at around 34PSI all around. Brought them down 2 lbs, and I'm about to head out on a trip to Renton and back. I'll play around with steering modes and post what I find out.

 

[Phlyguy]

I just checked and corrected the cold tire pressure. It's 38 degrees outside, and my analog meter correlated with TPMS at around 34PSI all around. Brought them down 2 lbs, and I'm about to head out on a trip to Renton and back. I'll play around with steering modes and post what I find out.

Something to note...when you change chassis modes between comfort, snow, sport, and track, you are actually changing steering effort, throttle action, shift points, and stability control action...suspension calibration is fixed. In order to really change ride and handling, one needs to change wheel/tire combinations accordingly.

 

[JimmyTwoTimes]

I always keep the steering in "comfort" mode... for the most part (like 90% of the time) I drive with one finger on the steering wheel (either my left or right index finger wrapped around the side steering wheel spoke), and the lower effort of comfort mode makes it easier to steer without having to put too much pressure on my finger.

 

[ranchero]

Electric steering. Ford electric steering.

I do not have my (ordered) '15 Mustang yet but I know what you are talking about. I have this situation on my '12 Focus with electric steering. I notice this issue at high speeds on straight freeways with no traffic - like out west where I live.

I think this may be a characteristic of electric steering that those of us with no prior car having the feature now find a bit disconcerting.

- ranchero -

 

[Spartan]

What tires come stock on the EB with Performance Pack? Are they Pirelli P Zero's? The Pirellis are sensitive to road temperatures and tire pressures. Think you have a combination of minor alignment and tire pressure/compound items going on plus the adjustment to center line thrust rear wheel drive sensitivity. Add to this the electronic EPAS and you're feeling every undulation and imperfection on the road surface...different tactile feel

Yep they are the summer Pirelli P Zero's.

 

[Hack]

Electric steering. Ford electric steering.

I do not have my (ordered) '15 Mustang yet but I know what you are talking about. I have this situation on my '12 Focus with electric steering. I notice this issue at high speeds on straight freeways with no traffic - like out west where I live.

I think this may be a characteristic of electric steering that those of us with no prior car having the feature now find a bit disconcerting.

- ranchero -

Not my experience.

 

[evildronepilot]

Electric steering. Ford electric steering.

I do not have my (ordered) '15 Mustang yet but I know what you are talking about. I have this situation on my '12 Focus with electric steering. I notice this issue at high speeds on straight freeways with no traffic - like out west where I live.

I think this may be a characteristic of electric steering that those of us with no prior car having the feature now find a bit disconcerting.

- ranchero -

My C-Max and the TC were electric assist, and I didn't have this issue.

But, I just drove it in the city and some freeway traffic, and it seems like I've muted the issue a bit with the proper tire pressure. I still find that "Sport" seems to feel better and requires less effort to keep straight. I think that "Comfort" is too sensitive and it's almost like having "high-gains," on the steering input.

 

[cush]

I think it drives great! very responsive and flat, no body roll at all! I think if your not used to rear wheel drive (RWD) you could be experiencing a bit of over-steer which is common in RWD cars particularly those with fairly high power.

 

[evildronepilot]

I think it drives great! very responsive and flat, no body roll at all! I think if your not used to rear wheel drive (RWD) you could be experiencing a bit of over-steer which is common in RWD cars particularly those with fairly high power.

I love the cornering of this car. It's just the straight-line tracking that feels a bit different to me.

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