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Q&A with Dave Pericak

Jarstang

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UPDATED with more Q&A with Pericak, some of which were asked because a few members here requested it. Also included a few questions from other media.

Q: How will the (GT) track pack perform?
A: The track pack is going to outperform the Boss for sure.

Q: Any plans for a Boss 302 replacement?
A: We've been in (Mustang) business for 50 years and if you look at what we've done, the Mustang has always had specialty cars and performance vehicles. You can expect that we're going to stay on the same path. Today, we're here talking about the new Mustang, so we're not talking about any plans for future cars at the moment, but it would be wrong for me to say that we're not going to do that. It's been in our blood, it's been in our history, so stay tuned.

Q: Any difference in the half shafts of the performance package between US and European models?
A: The half shafts don't change between North America and Europe. We did have to stiffen them up and other things to make them survive the performance that we needed and the hp/torque that we were putting through them. The half shafts are going to be very capable of handling what we’re doing.

Q: What brakes and brake upgrades will be available?
A: The V6 and EcoBoost (entry) models get 2 piston floating calipers. The base GT and EcoBoost performance package will get 4 piston fixed calipers (more capable than the current Brembo brakes). The GT with performance package will get 6 piston fixed calipers which are not available on the EcoBoost.

Q: Would the 4 cylinder EcoBoost with performance package rival the V8 around the right track?
A: [Doubtful pause] Hmm, it would have to depend on the track. The EcoBoost performance package is definitely going to be a bit more balanced and it’ll be a little bit lighter but you have quite a bit of horsepower delta between the two. Both cars are going to be extremely agile but there’s no doubt that the Ecoboost is going to have better balance, be a bit lighter, a little easier to toss around.

Q: Does the 4 cylinder share anything with 2 liter for the Falcon?
A: What I can tell you is that this 4 cylinder has been specifically designed for the Mustang. We knew the horsepower and torque we needed to get out of it, and the twin scroll turbos and integrated exhaust manifolds which allow us to split the cylinders up so we can continue to pulsate the turbocharger. The MKC has announced that it will be using the Mustang engine in a FWD application, but again, we designed this specifically for the Mustang and MKC is going to pick this up. The Mustang was priority.

Q: Any special metals used in the chassis or side impact barriers to keep the car as light as possible?
A: Yes, we are not disclosing all of that, but I’ll just say generally, we have several high strength materials that we're using throughout the vehicle to manage the roof crush standards, side pole, offset barrier, etc. A lot of the new requirements are very challenging especially when you try to do a car like this. So yes, we very much increased our usage of high strength materials, but we are not disclosing the details at the moment.

Q: Will the current GT wheels fit on the 2015 GT?
A: I would have to do a study on that one, but I believe depending on which wheel you choose, some of the wheels will fit, but not with the 6 piston fixed caliper brakes (that the GT performance package will be equipped with). With the standard brake package I believe you can still put them on, but I’d have to check that to be 100% sure.


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Our friends at auto evolution have shared this Q&A with chief engineer Dave Pericak that has some interesting tidbits. We only have a few to add to this which we'll try to update here tomorrow.

It's been a long day folks--enjoy.


Q: Let's start with the development phase. We know you've benchmarked the ex-gen BMW M3 and the Porsche 911. The M3 is pretty much self-explanatory, but why the 911?
Pericak: We were putting an IRS in this car and we wanted to make sure that we raise the bar quite a bit. So how do you do that? It's by putting aspirational vehicles out there. We weren't trying to be like the 911, but we wanted to use that as one of the benchmarks. We said "they do a great job at certain things, so to understand how they're handling it, how they're managing their suspension setup and how that's relevant to Mustang." Again, this is about stretching yourself beyond where you are today so that you can actually get better.

Q: However, you (personally) must've spent quite some time behind the wheel of the Porsche 911, so what did you find out about it?
There were a couple of things. The 911 does a great job when you change its driving modes, all of the systems change pretty dramatically. We have a new selectable driving mode feature in 2015 and so we're going to allow you to choose between Snow/Wet, Normal, Sport and Track. And to understand how Porsche separated all of their systems and made all those important changes. And then on some of the tight hairpin turns, to understand how the 911 stays relatively flat. Again, not trying to be the 911, but reaching beyond. And we used the BMW M3 (E9X) we beat it with our Boss 302 on the track.

Q: Speaking of these modes, how do they affect the stability and traction control?
Well, quite a bit. When you select each, you change three main things. One is the steering effort, the other is the Electronic Stability Control (the level that it's set at) and then the engine and throttle response calibration.

Q: For instance, what's the setup for the "in-between" Stability Control mode?
Even in the current Mustang, you have Full On, or Sport Mode. With the new one, if you go in Sport, you have about between two to seven degrees of yaw before it steps in. If you go into Track mode, you have like between five and nine degrees of yaw - how much it will let the car hang off, before it will actually correct you. And, of course, you can go into Full Off.

Q: Let's get into the details of the steering. Both your benchmarks, the M3 and the 911, score remarkably well in this area, so, besides the adjustable effort, what have you done for the 2015 Mustang, for the actual feel?
The entire suspension system on the 2015 is different. When we put the independent rear suspension in, we found out very quickly that the front suspension, which we did not intend to change, was not going to keep up with the rear. So there's an all-new front suspension, a double ball-joint setup and there's a full subframe up front. What that allow us to do is really take a lot of the compliance out of the car and really tighten things down. Now you get more precise, more accurate with the steering. All of that working, gives you better road feel and better overall handling.

Q: Let's move under the hood now. Focusing on the engines heading over to Europe, will the V6 be confined to the US?
Yes, the V6 will stay in the US, except for some minor export markets. Generically, when we export to Europe and the other countries, it will be the 2.3-liter Ecoboost and the 5-liter V8.

Q: We want to talk top speed - generally, European cars with the level of HP you offer on the three versions of the Mustang, have higher top speeds than what you offer, at least on the current Mustang. Are you going to change these?
The top speeds have been increased at every level. The V8 does 155 mph (250 km/h), the V6 doing 121 mph (195 km/h), and then the Ecoboost base doing 121 mph, but the Ecoboost Track Pack doing 145 mph (233.5 km/h).

Q: Still, what is the source of these limitations - Speaking roughly, these HP to weight ratios, with the aerodynamics factored in the equation, should deliver superior top speeds.
Well, you get into a situation where cooling becomes a huge concern. We have very stringent requirement we have to meet. So engine cooling is the main factor here.

Q: Staying in the Ecoboost zone, the four-cylinder has a twin-scroll turbine and we wanted to know what's your policy towards tuning. The aftermarket world has always had a special place for the Mustang and they are going to play with the Ecoboost. Do you encourage this, try to limit it, or are you neutral?
We embrace all of the customization that goes on and we embrace our aftermarket attempts. I pride myself and my team on putting out the best engine with the best calibration we can possibly do. I don't want to leave anything on the table. A lot of times producers come up with an engine and they will leave something unexploited. Then the tuners can come in and they can gain that. But I want to give everything that I can to the customers. So do I discourage the aftermarket scene? I don't discourage it, but I also can't stand here and say that we would stand behind it. We stand behind these cars when they come out of the factory, we're pushing them to the limits and they're still durable. Anything that gets done post when we give it to you, it's probably not that durable and you're taking that risk upon yourself. But I know people like to do it and as long as they understand the risk they have to take...

Q: Have you changed the positioning of the engine within the platform? Many new car developments place the front-mounted powerplants further behind the front axle and/or lower for better weight distribution and a lower center of gravity. How about the new Mustang?
When you do an all-new platform, which is what we've done and you're trying to put three different engines in there, every one of the units has gone through a bit of a tweaking to fit in that space. Is there something major? No, but it's not in the exact same location where it's been before.

Q: How about the weight? We're expecting something like 200 lbs (90 KG) lighter.
We're not discussing weight right now. One of the things that you'll see is that we've set very high performance targets for this machine and we are more than hitting those targets. Having said that, we'll discuss weight when we're ready - we built a couple of prototypes, we'll build more prototypes and we'll finalize the weights as we go through. But we have the best brake systems ever on a Mustang, we've got all of the right hardware to make it perform. That's what we've focused on - setting a high level of performance and it's more than achieving that.

Q: So it's still a bit of a work-in-progress here, around the edges. You're still developing the final bits.
Yes, we're fine tuning, but as far as weight goes, you can imagine, we have a weight target set for the Mustang, but we're now getting actual parts to come in from the suppliers, so we're weighing everything.

Q: You mentioned the independent rear suspension, are you going to do a version with a solid rear axle? The Mustang has quite a history with drag racing and that would fit in nicely.
No, we do not plan to offer a solid rear axle. It would be a fairly significant tear-up to try to even get a rear axle in there. All of the floor and how you position your exhaust is completely different. You'd almost be cutting the whole back end and redoing it. So we know our customers love to go out and drag race in the weekend and we'll make sure it's all durable. And if somebody's going to be a professional racer, they're going to put a solid rear axle in anything they drive anyway.

Q: Speaking of this, let's zoom in on the take-off. Have you done something special to the clutch to withstand launches?
We've made a significant update in our clutch and gearbox and the IRS is allowing to get twice the anti-squat and anti-lift we have in today's car. So the vehicle stays a lot flatter. So during braking and acceleration the car doesn't lean nearly as much. We also have launch control, which is going to be standard on V8s. Through the steering wheel, you'll be able to set the rpm level that you'll be launching at every time.

Q: And as for the automatic, do those get launch control too?
No, only the manuals receive launch control.

Q: With the IRS, the Mustang becomes better for the time attack. Thus, do you see a potential stripped-out version that would reduce weight and costs for track enthusiasts?
We don't have anything specific in the works at the moment. As of right now, we're not intending to strip it down.

Q: 2015 marks the 50th anniversary of the Shelby GT350, is it time for something special?
Right now we're enjoying the brand new Mustang, so I would ask you to stay tuned. The Mustang is going to continue to do what it's always done, which is to provide a steed for every need.

Q: You explain that the new Mustang is quicker, more refined and more economical. That's excellent for Europe, but here in America people don't go out and buy a Mustang for that, the badass-ery is paramount. So what have you done about that driving spirit?
It still retains all of its badass characteristic and even gets to a new level. So, number one, like you said, our current customers are traditionalists, they wanted something fresh, but from a performance perspective, we've raised the bar. We've made the whole car perform better than a Mustang has ever done in the past. In fact, one of our internal targets was to take the 2015 Mustang GT Track Pack and beat a Boss 302 out on the track. And we are definitely going to do that. Besides the Launch Control and Track Apps we're going to have some new ones we haven't even talked about and customers are going to love it. When it comes to being badass, this car is going to deliver it and it's going to do it better than it's ever done in the past.

Q: What makes the Mustang a global car?
The demand for Mustang has always been there. The world was ready for the Mustang long before the company was. Still, we did not design a global Mustang, we designed a Mustang and we're taking it global. People want a piece of Americana, they want what the Mustang stands for, which is the badass car you've asked about. We're ready to take it global and we're ready to do it in a right-hand drive version and we're working on the right now.

Q: Will European dealers have to meet a special level in order to receive the right to sell Mustangs?
Our marketing team will have to give you the official answer on that. But my answer is: no, we're looking for the 2015 Mustang to help build the Ford brand, so, to my knowledge, there's not been any criteria placed on a particular dealer selling or not selling Mustang. This car is for everybody.

Q: Since the new Mustang came out, we've heard a lot of positive stuff, but we've also heard people saying they're afraid it's become diluted due to this globalization.
The people who have made those comments probably haven't seen it in person. I don't personally believe that we've diluted anything. I think that what we've done is take the Mustang everybody loves and we've been able to make it very modern, something that's looking forward into the future and not always try to live through the past. I accept the criticism, I think you're going to get that no matter what you do. A lot of times you get guys who said things like the ones you mentioned, they also are the same people that come back and tell us "you didn't change it enough for me to go buy a new one." People love what they have and they do feel a little uncomfortable when there's something new.

Well, when you see the car in front of you, that is very much Mustang - people will fall in love with it. We know our customers, we know our car and I think we hit it.

I've been asked if I'm nervous about the first people going out and driving the 2015 Mustang. No, I'm not! I can't wait for people to get behind the wheel, because the Mustang drives even better than it looks.
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Wild Stang

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Great work JarStang. Really appreciate what you've done today.
 

likeaboss

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Top speed across the board is weak. I hope they didn't put crappy drive shafts in the V6 and Ecoboost.
 

xlover

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Top speed across the board is weak. I hope they didn't put crappy drive shafts in the V6 and Ecoboost.
Probably tire limitations, non track pack base models are going to have a cheaper all season.
 

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145 and 155 aren't terrible for 300 and 450 HP, but it would be nice to know the reason for that limitation (tires, driveshaft, cooling, etc.). That way, if you wanted go faster you'd know where to start the mods. I know cooling was mentioned, but is that engine, oil, transmission, rear end???

-T
 

trolls56

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With the new car it makes me move back to ordering it with a manual. Interesting to hear him say launch control on works on the manual.
 

Grimace427

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Autos don't need launch control nor could they make use of it with the torque converter limiting RPM's when the brake is pressed. Trans brake would be the only thing an auto could get, and from the manufacturer that is pretty much never going to happen.
 

WestRace

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Q: Have you changed the positioning of the engine within the platform? Many new car developments place the front-mounted powerplants further behind the front axle and/or lower for better weight distribution and a lower center of gravity. How about the new Mustang?
When you do an all-new platform, which is what we've done and you're trying to put three different engines in there, every one of the units has gone through a bit of a tweaking to fit in that space. Is there something major? No, but it's not in the exact same location where it's been before.
Not sure why they are so tight lip about the weight and weight distribution as if it's some type of sacred.
 

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Not sure why they are so tight lip about the weight and weight distribution as if it's some type of sacred.
Well they mentioned better performance and better brakes when asked about weight. That probably means something if you're reading between the lines.
 

Husker

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2015 marks the 50th anniversary of the Shelby GT350, is it time for something special?

Right now we're enjoying the brand new Mustang, so I would ask you to stay tuned.

The Mustang is going to continue to do what it's always done, which is to provide a steed for every need.
Well, I think he confirmed it: stay tuned & provide a steed for every need -->:shrug:
 

jjw

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Well they mentioned better performance and better brakes when asked about weight. That probably means something if you're reading between the lines.
That is what I am afraid of.
"Regardless of weight gain, we met our performance goals".

Hard to say… like he said they are still working on it with suppliers.

It was nice to get a little more insight though…. thanks.
 

HGFireHazard

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These varying responses are so different. We hear they set very aggressive weight goals and they are on target to meet them, and we read this and to me it says the car probably didn't lose weight.

It would be nice to be able to put this question to rest.
 

Darrinm03

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These varying responses are so different. We hear they set very aggressive weight goals and they are on target to meet them, and we read this and to me it says the car probably didn't lose weight.

It would be nice to be able to put this question to rest.

Im afraid we are starting to teeter totter on that fine line to where this secrecy of all this info with nothing leaking out is starting to become counter productive for Ford. Im sure all who are watching this '15 mustang are getting frustrated with the lack of info....people need time to make a big decision such as purchasing a $30,000-$40,000 vehicle...and in order to make that decision, we need INFO. I mean, price ranges havent even been released yet, how is one supposed to plan financially for this when everything gets released 2 months before orders can be placed? Not to mention, this Mustang is WORLD WIDE as of this year model, so people all over are waiting on this info. Now its beginning to spawn absurd rumors, contradicting info on the vehicle depending on which rep you talk to. I doubt they will lose potential buyers with this approach to marketing, but why not trickle in the important info slowly over the months? Feb could be pricing, march could be focused on weight, april during the NYC show could reveal all the HP numbers, then go more in depth on everything else in the following months. Just me on my soap box venting i guess with this lack of info coming from the Detroit show. For Ford, this was the F-150's day to shine, but by putting 3-4 mustangs on the floor, i think they overshadowed the F-150's day :amen:
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