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Tesla Model 3 Performance - AWD - vectoring

 
Old Aug 5, 2018, 04:56 PM
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Tesla Model 3 Performance - AWD - vectoring

Well, Road & Track did a track impression of the AWD Tesla 3 performance. They were very positive. No track times because they were driving in the rain.

Tesla Model 3 Performance: Track Test

Tesla's dual-motor, 450-horsepower Model 3 Performance has a new Track Mode. We took it to Lime Rock Park to see how much hot-lapping this electric sport sedan can really handle.

BY BOB SOROKANICH
AUG 3, 2018
1.8KIt started, as so many things do these days, with a tweet. Tesla CEO Elon Musk uses Twitter the way most of us use our inner-monologue voice. Thoughts leave the top of his head and plop in front of his 22.3 million followers with no steps in between.

They seemingly come without warning. It's easy to imagine a Musk tweet catching the folks who work for his car company—or his rocket company, his solar panel company, his brain-computer interface company or his tunnel digging company—completely off-guard. You envision engineers, designers and public-relations managers leaping into action, trying to figure out what the eccentric billionaire industrialist is talking about now, how his latest statement will affect the thousands of hard-working people he employs. Or at least, that's how we see it.

Those off-the-cuff tweets can lead to real-world outcomes. Like the car you see here—the Tesla Model 3 Performance, with 450 horsepower, 471 lb-ft of torque and dual-motor all-wheel drive. Hidden in a menu on its center-dash touchscreen, this particular car has a new Track Mode that gives it capabilities no previous Tesla has offered. Gearheads within Tesla had been dying to add such a feature for years. When Musk unexpectedly tweeted about how this car would spank its most noted rival on track, the team saw it as full permission to get the feature ready for rollout.

Why, which Musk tweet did you think I was talking about?

The standard knock against high-performance electric cars has always been, "what happens when you take it to the track?" Batteries work best in a narrow temperature range. Heavy-duty use—like the sustained acceleration of a track session—can send cell temps skyrocketing while burning up your driving range. To be fair, internal-combustion cars belch heat and scarf range on track too. But in your Camaro, you can zip off to the nearest gas pump and be ready to rock again in minutes. In the majority of electric cars, that's not the case.


So when Tesla informed us that its new car would have a dedicated driving mode for track use, we arranged a meetup at Lime Rock Park, America's oldest continually-operating road course.

The short answer is: No, you can't run laps all day long at qualifying speed. But there's much more to it than that.

You'll need sharp eyes to distinguish the Performance model from lesser Model 3s. It sits slightly lower on new 300-treadwear Michelin Pilot Sport 4S tires, 235/35 on 20-inch wheels all around. The brakes are bigger, 14 inch two-piece bimetal rotors and four-piston fixed calipers up front. The bodywork is nearly unchanged. A small decklid spoiler and a tantalizing "DUAL MOTOR" badge are the only giveaways.

Tesla fans know what that means. Like the gnarliest versions of models S and X, this all-wheel-drive 3 launches from a standstill like a rifle shot. Our testing measured a 0-60 time of 3.51 seconds, 0-100 in 8.84, and a quarter-mile of 12.07 seconds at 114 mph. Keep the pedal nailed, and you'll pass 120 mph in 13.69 seconds, on your way to a 155-mph top speed that's 15 mph higher than the base Model 3. The braking is prodigious, too, with 60-0 and 80-0 distances on par with a BMW M3 on carbon ceramics.

Fast Teslas have been around for years. The novelty of near-silent supercar acceleration? It still hasn't worn off. A Musk non-negotiable demands that every Tesla should launch from a dig "without event," never squealing its tires. Somehow, you don't miss the rubber howl. The Model 3 Performance just explodes forward instantaneously the moment you toe the pedal. It makes the traditional notion of "throttle response"—waiting for air and fuel to be drawn into combustion chambers, burned, and exhausted, all building up to a gradual increase in rotational speed of a reciprocating system—seem woefully quaint.

That's all great fun on the street. But acceleration alone won't get you around a race track.

Lime Rock Park is a bullring. A 1.5-mile course with six right turns and a single left, it's a fast, flowing, 3rd-and-4th-gear hoot through the hills of northwest Connecticut.

Most days, the woods around the track echo with the sounds of dead dinosaurs sacrificed to speed. Not today. As I pull out of the pits in the Model 3 Performance, the silence is eerie. With no engine noise, all I hear is the grainy rumble of the tire treads gripping the pavement, cut through on occasion by the faint high-pitched skeeeee of the electric motors under hard acceleration.

The standard, rear-drive Model 3 I tested earlier this year was a joy on winding country roads. The hefty battery pack is slung beneath the seats and between the axles, putting the car's center of gravity roughly level with the driver's elbows. That, plus a delightfully quick and talkative steering rack, makes Tesla's smallest sedan corner intuitively, with excellent suspension compliance and minimal body roll.

The dual-motor Performance model doesn't mess with the original recipe. Ride height is down 10mm, but spring and damper rates are nearly identical. The Michelin tires use a tread design and rubber compound selected specifically for this vehicle. Turn-in is crisper than on the base Model 3, and the car invokes its polyurethane bump stops a little sooner in hard cornering. It's the same familiar, charming Model 3 behavior, but sharpened.

t's easy to make a car that handles well. But if you want to make it go over bumps and ride well, be comfortable, that is really difficult to do," Lars Moravy, Director of Chassis Engineering tells me trackside. "We worked long and hard to make it be able to go around the track fast, be agile, be responsive, but not shatter your teeth out."

It's working, but the car's street-oriented safety systems have other plans. Hauling down from triple digits at the end of the straightaway, the steering wheel judders with ABS that lasts well into trail braking. The Performance version weighs 4037 lbs, some 227 lbs heavier than the rear-drive model, but it's distributed 50/50 front-to-rear. Working the mass to balance the car is easy. But any whiff of yaw brings out the invisible hand of stability control to steady the chassis.

Time to pit in and push the button we came here to push. The one labeled Track Mode.

Tesla’s spokespeople, and the dashboard itself, implore you not to use Track Mode on the street. Let's acknowledge one thing right now: We had two Performance Model 3s at our disposal during our day of track testing at Lime Rock. This ensured that R&T's Digital Director Travis Okulski and I each got ample time behind the wheel. It backstopped us against track day unpredictabilities like scorched tires or cooked brakes, neither of which happened. And yes, it had something to do with battery life. We'll get to that.

Ed. Note: While the track was relatively dry during our acceleration and braking tests, it began pouring rain during our lapping sessions. Due to these inconsistent conditions, we did not measure lap times.

Tesla is still working on the final calibration of Track Mode. While both vehicles had this feature enabled, the second car carried a newer version of the software, beamed down via over-the-air update the day before our track outing. I was assured the version we tested was nearly identical to what customers will receive when the option goes public sometime soon.

To understand what this new mode does, you need to forget most of what you know about typical stability and traction control systems. "Our Track Mode doesn't disable features, it adds them," Michael Neumeyer, Manager of Chassis Controls, told me.

Think of how this car's dual-motor all-wheel drive system works. Torque output from the front and rear motors is constantly finessed by the car's computer controllers, reacting instantaneously to traction conditions and driver demands. It's akin to a modern fly-by-wire fighter jet—no computers, no go. This car's driveline, chassis and dynamic control systems are all intertwined. You can't just "turn off" traction control. (We learned this when we coaxed a rear-drive Model 3 into doing some donuts earlier this year. The car was not happy.)

Neumeyer and team programed the vehicle dynamic control system in-house to make Track Mode possible. This mode pushes the margins of stability control farther away. (Note: Track Mode does not alter acceleration performance; the Model 3 Performance does not have a launch mode or Ludicrous acceleration setting.) But more importantly, it does some tricky things with the car's regenerative braking.

On the street, you use regen for about 90 percent of your normal braking. When you lift off the accelerator, the electric drive motors become generators, sending charge back into the batteries. Out on the track, regen becomes a tool to help balance the car's chassis. Those light, delicate brake modulations you use to adjust a car's attitude mid-corner? Now you get them with a slight lift of the accelerator. It's instantaneous, braking and acceleration balanced from one pedal.

It also gives the Model 3 Performance a nifty trick no other Tesla can do: Lift-throttle oversteer, coded right into the software. In Track Mode, the regenerative braking is increased significantly—up to 0.3g of deceleration, compared to a max of 0.2g in street trim. When you lift in a corner, the regen tosses all the weight forward, loading up the front axle. The rear tires, now regenerating under much less weight, break loose. The stability control looks the other way. Presto! Oversteer.

At this point, if you were to, say, nail the accelerator, the system would overdrive the front axle motor, powering the front tires to pull you neatly out of the corner in a controlled return to the line. You'll kill me for saying it, but this sport sedan has the same toss and catch that makes the best front-drive hot hatches such a joy to hustle—bolstered by no-joke instant horsepower and the predictability of vectoring all-wheel drive.

As you can imagine, this is a ton of fun. The magic of the Model 3 platform is in the feedback. The quick steering murmurs surface changes into your fingertips. The chassis lets you know exactly where and when the weight is shifting. Tossability, low polar moment and charm are all baked into the design. The Performance upgrades just let it sing louder.

The car minimizes distraction. With no engine noise to out-shout everything, and no concerns over shift points or powerband, you can focus on the most elemental part of track driving: The tires. I've never had such a clear understanding of the millisecond changes in front-end grip through a corner. You hear, and feel, everything going on at the contact patches, even at 100-plus. Pushing wide through Turn 1? Dab in a little regen, load up that front axle, and get ready to rotate. Feeling light over Lime Rock's puckering Uphill? You'll hear it, and correct for it, at a level you've never experienced in a bellowing internal-combustion car.

Fine, fine, so the thing can drift. What about the batteries?

At full speed, each lap of the 1.5-mile circuit burned up about nine miles of battery range during our testing. Lime Rock Park has just installed a passel of 240V Level 2 Tesla chargers at its facility—not Superchargers, but the kind of residential charger that will fill your Tesla's battery from dead in about six to eight hours. So, having plugged in overnight and immediately hit the track with a full 310 miles of range, we could have run just over 30 full-speed laps before needing to unspool the extension cord. Right?

Not exactly. Heat buildup is inevitable. After three or four laps at absolute tire-torturing full speed, the car begins to reduce power output. It's a balanced, gradual event. The motors and battery use cooling circuits that are independent but linked; as one component heats up, the system shifts cooling capacity where it's needed. It can even use the battery as a heat sink to shed excess thermal load from the motors.

This linked approach to thermal management means that, unlike previous Teslas, track driving won't lead to a total performance shutdown when one component's temperature spikes. Battery and motors heat up at the same rate; when the car starts approaching its thermal limits, it dials back power gradually, until the heat output can be managed by the car's cooling capability.

And you can keep lapping through it. The car's power output plateaus, the cooling system reaches a steady state. You're more than welcome to continue in this condition until you've drained the batteries. You'll miss some of the hard punch of acceleration coming out of the corners, but you end up driving it like a momentum car. It's still a ton of fun.

Moravy told me that, before we arrived at Lime Rock Park, his team had run simulations to see how Track Mode would perform at this particular circuit. The data predicted that, after roughly three full-speed, perfect laps, the car would gradually start pulling power, hitting equilibrium at a pace about two to three seconds off the absolute quickest lap times the car is capable of. To him, that's not a devastating loss of performance. "Two, three seconds, that's equivalent to driver error," he points out.

Our experience matched his predictions. After three or four laps, the hard slap of the Performance Model 3's acceleration slowly began to dissipate. It was always gradual, workable, not a sudden loss or change of performance. A few cooldown laps—or 20 minutes parked in the pits while we ran our backup car—and the thing would bounce right back to full power, no drama involved.

Is this a limitation? Sure. But it's one we've experienced in plenty of internal-combustion cars. At our Performance Car of the Year testing last year in summertime heat, our particular Honda Civic Type R could only hold on for two laps of NCM Motorsports Park before
. An Alfa Romeo Giulia Quadrifoglio that our man Sam Smith tested at Gingerman Raceway fell on its face on its first full-speed lap, multiple times. (Alfa Romeo later explained that the car we tested was missing some crucial software updates.) A new Mustang GT with Performance Package 2 will start to overheat its differential after a handful of laps at a typical circuit. Ford figures if you wanted a track car, you'd have gone with the GT350. And remember the well-documented track day overheating problems of the Corvette Z06?

Driving on a race track at speed puts huge demands on any car. Handled unsympathetically, even the most track-focused production machine will boil its brake fluid or spike its temp gauges. In our testing, we found the Model 3 Performance to be a joy around the track. It's a tossable delight, even under limited power. And while the rationing of horsepower might be frustrating, it ensures that, as long as all cooling systems are working normally, you'll never fry the car's circuitry, no matter how hard you drive it.

There are, of course, drawbacks. After an entire morning of track laps and hooning around Lime Rock's autocross and skidpad, our two Model 3s each had less than 40 miles of battery range left. Making the 110-mile drive back to my home in Brooklyn, NY meant plugging into one of Lime Rock's chargers for an hour while I grabbed lunch, then pit stopping at the first Supercharger on my route home. The situation was never dire, but it required a bit more forward planning than simply GPSing the nearest gas station.

And I get it: Nobody outside the car magazine business is going to bring two cars to a track day and hot-swap drivers to keep lapping. Especially not when they cost $78,000 each, as happens when you order a $64,000 Performance Dual Motor Model 3 with the $5000 Performance Upgrade, $5000 Enhanced Autopilot, and the ritziest paint and interior options.

Let's be honest. This isn't a "track car." It's not meant to compete with the Camaro ZL1 1LE, Mustang Shelby GT350R or the dearly-departed Dodge Viper ACR. If you're buying a four-door sedan, even a righteously quick one, you're probably not planning on chasing apexes and torturing tires with it every weekend.

In that context, the Tesla Model 3 Performance does a realistic job of delivering impressive numbers and unbeatable feel. It's quick, it's tossable, and unlike everything your garage buddies told you, it won't melt at the mere whisper of a full-speed lap. It's a compelling argument for feelsome, charming electric cars. No surprise, given who built it: Neumeyer's garage includes a BMW 2002 and a Porsche 912, while Moravy wrenches on vintage Volvos in his off time.

What they've created along with the entire Tesla team is the world's first electric sport sedan with bona fide race track chops. That's important for electric car technology, for motorsports culture, and for the future of the automotive hobby as a whole.

It's almost enough to make you thankful for Twitter.


https://www.roadandtrack.com/new-car...ce-track-test/
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Old Aug 5, 2018, 04:58 PM
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I cut & pasted the article and had to cut out some stuff (pics etc.) so I may have made a mistake. Go to the article link if want pictures and the unadulterated original!
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Old Aug 5, 2018, 07:01 PM
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So I guess the car costs as much as a well optioned new M3 and needs a cool-down period after every track session. The track that you go to needs to have tesla chargers or you wont be able to do as many sessions/get home. Its cool to read about how it handles but there are numerous issues to using it at a track.
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Old Dec 16, 2018, 05:46 PM
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I guess I shouldn't have put vectoring in the title because it doesn't. Anyway, here a modified Model 3 Performance at Laguna Seca. I have no idea about how this compares to what is good there or relative to what it's gas competitors would run. I need track hounds to weigh in here.

https://www.roadandtrack.com/motorsp...ca-lap-record/

Last edited by moparfan; Dec 17, 2018 at 10:35 PM.
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Old Dec 16, 2018, 10:13 PM
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SpecMiata on Hoosiers 205/50x15 can do a 1:44. And you know how "powerful" they are, not!
Spec Boxster (2.5 liter 200bhp 1997-1999 models only allowed) can do a 1:41 on Hoosier.

Tesla Model 3 has fericous acceleration compared to most car that run its laptime on Hoosier A7.
For reference, Mullerized sorted dual purpose Evo 9 2.3 FP Red on E85, 18x10s, 275/35x18 Hoosiers, does 1.34s- driven by owner who is NOT a racer, he is enthusiast. This is full weight Evo 9 stock body, stock aero, driven from LA to Laguna and back daily driver, not a race car.
7 seconds at Laguna is eternity.
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Old Dec 16, 2018, 10:45 PM
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I read the post above, Model 3 experiencing degradation of performance after 3-4 laps of a 1.5 mile track: Laguna is 2.25 mile long, so about 50% longer, and therefore the same car would likely experience loss of performance after 2-3 laps.

Hoosier A7 are autocross tires, they will not tolerate heat as well as R7 Hoosier.

Typical track day nowadays features 25 minute sessions: running 1.42 laps means you can complete 14 laps.
Normally we do 1 lap warmup, to get tires and fluids up to temperature: tires when cold are really dangerous.
So if Tesla can do 3 hot laps consistently, and warm-up lap means you drive at 8.5/10ths to warm up - you have at most 2 laps and have to pause.
Not exactly a way to enjoy a track day whatsoever.

As the tester said, its a daily driver, family touring car, that does everything well, and has a Track-Mode in which it can set a pretty hot lap.
But this is completely misguided argument, even wasting time on developing track-mode, because A) the car is still slow compared to other cars with anywhere near the same power on same tire B) virtually no owner will carry extra set of wheels with Hoosier A7 and have the patience and ability to mount the tires and "track-optimized alignment" to run 3 laps, and than pull into the pits.

The car does well what its supposed to do, and that should be merit enough: its not a sports car, nor a truck, its not off road vehicle, its a family car and it's very capable of serving as such

Finally, the article said that the range is affected about 6x more than normal road driving. Every 1.5 mile lap is equivalent to 9 miles on road.
So assuming 300 mile range, it means that if person was to chose to do a track day, they can travel 50 miles on track. At Laguna Seca that is about 20 laps.
There is no EV Supercharger at Laguna, there is no E85 either.

So it means the vehicle should be towed to the track and home, due to energy unavailability.
This is probably true for now at most tracks.
Which means its utterly unpractical to do a trackday in a Model 3, since nor can it do more than 3 laps nor can it go there and home on its own power.


Again, its a road car, and that it does well.
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Old Dec 17, 2018, 06:18 PM
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speaking of Tesla's

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Old Feb 11, 2019, 06:04 PM
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Not really the best place to put this, but:

How does the Tesla Model 3 AWD handle in the Snow. Different modes tested:

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Old Feb 11, 2019, 07:12 PM
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I've seen Tesla's at roll racing, they are good for the first 60 metres, not many could go with them, once they get to mid track they get blown by a good v8 or tuners car
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