Corvette C7 ZR1

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Corvette C7 ZR1

Post by 123go » Thu Nov 09, 2017 8:43 am

Étant donné qu'il semble que le dévoilement de la ZR1 serait effectué sous peu, possiblement dimanche, j'ai décidé de séparer les sujets de la C7 et de la C8. Le dévoilement serait effectué au Dubai motor show. La Zr1 serait ensuite montrée au Motor show de LA.

Un vidéo teaser de Chevrolet Le 12-11-17 https://www.youtube.com/watch?v=kBklxei ... e=youtu.be" onclick="window.open(this.href);return false;

Car & Driver veut être le premier à la montrer :cote:




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On voit le moteur , le LT5, qui serait le vénérable 6.2 litres, modifié et équipé d'un surcompresseur encore plus gros que celui de la Z06 avec au moins 750 hp (!!). La ZR1 est assez chargée comme design et rappelle la Viper ACR. La ZR1 serait une Z06 avec un moteur plus puissant (+100hp), des freins et des pneus plus gros, une suspension plus rigide, des ailerons de plus grande dimension et un meilleur refroidissement des éléments mécaniques. Il est aussi mentionné qu'elle cracherait du feu de ses échappements ( :diable: ) .

On parle d'un 0-100 km/hr en bas de 3 sec, d'une vitesse maximale de 210 m/hr, d'un quart de mille sous les 11 sec. Boite de vitesses manuelles de 7 vitesses ou automatique à 8 vitesses. Les freins en céramique standard, d'un prix débutant à $120,000 US. Fuel delivery à 2 systèmes; port injection et direct injection, 3664 lbs (humm....). Elle ne pourrait pas être vendue en Europe à cause de la hauteur du capot. Plusieurs "aero packages" disponibles dont le plus agressif avec une géométrie variable de 10 degrés(500 livres de downforce)

Si on veut spéculer sur son temps sur le Nuburgring, la Z06 a fait 7:13:90, la Viper ACR de 645 hp a fait 7:01. À mon avis son temps sera inférieur à 7 minutes, possiblement dans les haut 6:50 ?
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Re: Corvette C7 ZR1

Post by SilverViper » Thu Nov 09, 2017 11:28 am

Pas beau tout de suite mais si c'est efficace, je lève mon chapeau à GM. :super:
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Re: Corvette C7 ZR1

Post by 123go » Thu Nov 09, 2017 11:40 am

Je trouve aussi que c'est lourd comme design, un style Batmobile, on est loin de la ligne fluide de la C6. J'assume que tous ces ajouts aérodynamiques auront un effet important, mais je les aurais peinturés de la même couleur que la carrosserie VS noir pour les faire valoir.
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Re: Corvette C7 ZR1

Post by simarddominic » Thu Nov 09, 2017 12:43 pm

SilverViper wrote:Pas beau tout de suite mais si c'est efficace, je lève mon chapeau à GM. :super:
En plein ce que je me suis dit. Si la mécanique et les performances sont là, super..mais c'est pas parce que c'est moins cher que ça doit être :berk1:

On est loin de Ferrari côté design !

Superfast:

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Où encore mieux, la prochaine Ferrari 612 GTO III !

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Re: Corvette C7 ZR1

Post by SilverViper » Thu Nov 09, 2017 1:14 pm

Ils auraient pu se forcer un peu sur le design. La Viper ACR est pratiquement un chef-d'oeuvre esthétique à côté. Ça fait vraiment "bébelle"! Dommage.
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Re: Corvette C7 ZR1

Post by 123go » Thu Nov 09, 2017 1:35 pm

On va voir ce que ca donne du côté des performances et les attentes sont très élevées. À mon avis, ils devaient partir de la Z06 et ajouter tous les éléments requis pour améliorer les performance de facon importantes, on voit ce que ca donne. La version illustrée plus haut est la plus drastique. Il y aura aussi une version de la ZR1 avec des éléments moins drastiques et même une version décapotable, ca devrait être un peu mieux. Sinon, la C8 devrait corriger tout cela. :hehe:
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Re: Corvette C7 ZR1

Post by SilverViper » Thu Nov 09, 2017 2:08 pm

C'est l'ancien designer en chef de Pontiac qui doit sévir chez Chevrolet présentement.
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Re: Corvette C7 ZR1

Post by ProbeGT » Thu Nov 09, 2017 2:24 pm

J'aime las le devant de la 612 qui fait très "F1-esque" mais à partir des lumières en allant vers l'arrière, DAMN!!!!!!
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Re: Corvette C7 ZR1

Post by ProbeGT » Thu Nov 09, 2017 2:28 pm

Btw, Tyler Hoovie résume bien ce qu'est devenu la corvette.

https://youtu.be/tAFdeFs6y9E" onclick="window.open(this.href);return false;

C'est sur par contre que dans les années 70, il y avait peu de compétition, c'est plus facile de garder la légende dans ce temps la.
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Re: Corvette C7 ZR1

Post by Ben » Thu Nov 09, 2017 3:45 pm

On s'entend que comme la Corvette Stingray ou la Z06, ça sera un rapport performance/prix imbattable!!!!

Alors que la Corvette de base tout de meme de belles lignes (sauf l'arrière à mon avis), celle-ci est simplement trop de bébelle tout autour, comme la ACR ou la Camaro ZL1 1LE!!!! Je préfère conduire une voiture qui est légèrement plus lente mais que j'aime regarder.... chacun son trip!

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Re: Corvette C7 ZR1

Post by 123go » Thu Nov 09, 2017 4:45 pm

i
Last edited by 123go on Mon Nov 27, 2017 6:57 pm, edited 2 times in total.
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Re: Corvette C7 ZR1

Post by 123go » Thu Nov 09, 2017 5:01 pm

Ben wrote:On s'entend que comme la Corvette Stingray ou la Z06, ça sera un rapport performance/prix imbattable!!!!

Alors que la Corvette de base tout de meme de belles lignes (sauf l'arrière à mon avis), celle-ci est simplement trop de bébelle tout autour, comme la ACR ou la Camaro ZL1 1LE!!!! Je préfère conduire une voiture qui est légèrement plus lente mais que j'aime regarder.... chacun son trip!
Bien d'accord Ben. Mais, à mon avis on doit respecter ce que GM réussi à faire en terme de haute performance, pour le prix demandé.
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Re: Corvette C7 ZR1

Post by 123go » Thu Nov 09, 2017 5:05 pm

SilverViper wrote:C'est l'ancien designer en chef de Pontiac qui doit sévir chez Chevrolet présentement.
Pas du tout Silverviper. L'équipe Corvette est à part de tout ce qui se fait chez GM. Leur mission est de produire des voitures haute performance coute que coute. J'admet que la Zr1 n'est pas la plus belle réussite en terme de look, mais ca n'a rien a voir avec Pontiac...J'ai hate de voir sa performance, pour une voiture de $160,000 CDN vs la Huracan performante de $425,000 ;)
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Re: Corvette C7 ZR1

Post by 123go » Thu Nov 09, 2017 5:12 pm

Hey, sans rancunes ! :hehe:

PS: Et une chance que je met des posts sur les corvette car il ne se passerait rien sur le site.... :0 :hehe:
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Re: Corvette C7 ZR1

Post by SilverViper » Thu Nov 09, 2017 5:38 pm

Oui mais ça ne coûte pas plus cher faire une belle voiture. :langue:
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Re: Corvette C7 ZR1

Post by SilverViper » Thu Nov 09, 2017 5:41 pm

Image

Moi je vois une resemblance. :mdr3:
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Re: Corvette C7 ZR1

Post by 123go » Thu Nov 09, 2017 5:47 pm

SilverViper wrote:Oui mais ça ne coûte pas plus cher faire une belle voiture. :langue:


Étant ingénieur de profession, je suis en désaccord Silverviper. Combiner la très haute performance, la beauté des lignes, la plateforme, la mécanique, l'aérodynamisme, et....surtout....les $$$ n'est pas une mince affaire.
Last edited by 123go on Thu Nov 09, 2017 5:56 pm, edited 2 times in total.
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Re: Corvette C7 ZR1

Post by 123go » Thu Nov 09, 2017 5:54 pm

SilverViper wrote:Image

Moi je vois une resemblance. :mdr3:

Alors la ca c'est laid je l'avoue.....mais Lambo n'a pas toujours eu le doigté avec ses créations :berk1:


Image
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Re: Corvette C7 ZR1

Post by ProbeGT » Thu Nov 09, 2017 9:52 pm

123go wrote:
ProbeGT wrote:Btw, Tyler Hoovie résume bien ce qu'est devenu la corvette.

https://youtu.be/tAFdeFs6y9E" onclick="window.open(this.href);return false;

C'est sur par contre que dans les années 70, il y avait peu de compétition, c'est plus facile de garder la légende dans ce temps la.
Ayoye !...quel vidéo merdique....Hey ProbeGT as-tu deja conduit une corvette récente ?? Probablement pas et ca manque sérieusement à ta culture !

On va voir combien de culs la nouvelle ZR1 va battre et on s'en reparle, OK ? ;)
C'est parce que tu le connais pas, c'est son style de faire des vidéos comme ca.

Tu me parles de la conduite et c'est exactement le point du vidéo. La corvette est performante mais au look elle n'inspire pas ce qu'elle a déja inspiré. Et bien que la 69 est de loin plus lente que la tienne, le feeling mécanique d'une voiture de cette époque est bien vrai, et ca vaut pour toutes les vieilles voitures sport.
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Re: Corvette C7 ZR1

Post by chiroky » Fri Nov 10, 2017 9:55 am

La Corvette a eu des années moins glorieuse, on n'a qu'à penser au C4/C5. Toutefois, depuis la C6 c'est toute qu'une bagnole en look, en performance, en fiabilité. Je ne connais aucune autre voiture qui peut en offrir autant pour aussi peu.
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Re: Corvette C7 ZR1

Post by 123go » Sun Nov 12, 2017 1:37 pm

Les informations commencent à sortir. Quelques photos officielles:

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Et quelques informations , à confirmer: 755 hp, 715 lbs de torque, 2 options pour les ailerons dont le plus agressif qui fournirait 950 lbs de downforce, prix de base $120,000 US, production limitée à 9700 unités (worldwide)
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Re: Corvette C7 ZR1

Post by 123go » Sun Nov 12, 2017 2:10 pm

"...DUBAI — The King is returning, stronger than ever.

Chevrolet today introduced the 2019 Corvette ZR1, a supercar that pushes Corvette’s performance legacy with the highest power, greatest track performance and most advanced technology in its production history.

“I’ve never driven a Corvette like this before, and nobody else has either, because there’s never been one like this before,” said Mark Reuss, executive vice president, Global Product Development, Purchasing and Supply Chain. “Its unprecedented performance puts all other global supercars on notice that the ZR1 is back.”

The Corvette ZR1’s exclusive LT5 supercharged engine, which is rated at an SAE-certified 755 horsepower (563 kW) and 715 lb-ft of torque (969 Nm), is establishing a new benchmark in performance. Further, the ZR1 elevates Corvette’s track capability with two wind tunnel-honed aerodynamics packages, including an available High Wing that provides an estimated 950 pounds of downforce.

Most powerful ever

The ZR1’s LT5 6.2L V-8 engine advances Corvette’s supercharging legacy, which began with the 2009 sixth-generation ZR1 and continued with the 2015 seventh-generation Z06. The LT5 delivers the highest output ever for a Chevrolet production vehicle, thanks in part to a new, more-efficient intercooled supercharger system that offers 52 percent more displacement than the Z06’s LT4 supercharger. GM’s first dual-fuel-injection system, which employs primary direct injection and supplemental port injection, helps the LT5 achieve its record output.

Seven-speed manual and eight-speed paddle-shift automatic transmissions are available with the LT5. It’s the first time an automatic transmission has been offered in a ZR1.

Fastest ever

The 2019 Corvette ZR1’s aggressive appearance is driven by function, contributing to its distinction as the fastest production Corvette to date.

An all-new front fascia is designed to channel air for propulsion-system and drivetrain cooling, with four new radiators bringing the heat-exchanger total to 13. A special carbon-fiber “halo” hood is open in the middle to clear the LT5 engine’s supercharger/intercooler assembly. Additional features, including aero packages with stanchion-mounted wings, help push the ZR1 harder onto the track for more confident handling and faster lap times. Top speed of the ZR1 is over 210 mph.

“As the highest-performing Corvette ever, the ZR1’s design supports its capability in every way,” said Kirk Bennion, Exterior Design manager. “The new wings, for example, help generate more downforce without adding drag, enhancing road holding and top speed.”

The ZR1 will offer two aero packages: a standard rear Low Wing, which delivers the highest top speed and helps generate up to 70 percent more downforce than the Z06’s base aero package, and an available two-way-adjustable High Wing that offers maximum downforce on the track for the quickest lap times — about 60 percent more downforce than the Z06 with the available Z07 Performance Package. All models also feature a Chevrolet-first, downforce-enhancing front underwing.

The adjustable High Wing is part of the new ZTK Performance Package, which also includes a front splitter with carbon-fiber end caps, Michelin Pilot Sport Cup 2 summer-only tires, and specific chassis and Magnetic Ride Control tuning for greater cornering grip.

Both of the ZR1’s wings are tied into the chassis, like the Corvette Racing C7.R racecar, for strength and stability.

Sebring Orange Design Package

The Corvette ZR1 introduced today also debuted a dynamic, available Sebring Orange Design Package. Centered on its Sebring Orange Tintcoat exterior color, the package also includes orange brake calipers, orange rocker and splitter accent stripes, orange seat belts, orange interior stitching and unique, bronze aluminum interior trim.

The new design package complements the Corvette ZR1’s tradition of offering maximum performance with refinement and design distinction. The driver-focused, well-appointed cockpit includes standard leather-trimmed seats, with sueded microfiber inserts offered. Heated and vented Napa leather-trimmed seating is also available, as well as a carbon fiber-rimmed steering wheel, competition sport seats, Performance Data Recorder, Bose premium audio system and more.

The 2019 Corvette ZR1 goes on sale next spring, poised to take on the world’s best.

It’s good to be the King...."
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Re: Corvette C7 ZR1

Post by 123go » Sun Nov 12, 2017 2:18 pm

"...
Being far away from Mainstreet America, Dubai may seem like a strange place for Chevrolet to launch its 2019 Corvette ZR1. But using a city whose mantra is "impossible is just an opinion" as a launchpad for the most powerful Corvette ever actually feels completely natural once you're here on the ground. GM may have chosen to reveal the ZR1 at a studio sound stage on Sunday, but its real coming out party will be at the Dubai Motor Show on Tuesday, where it will sit shoulder-to-shoulder with six- and seven-figure luxury sedans, SUVs and hypercars.

Based on the seventh-generation Corvette, this is only the fourth-generation ZR1, and it features a number of key innovations that help make it the most powerful production Corvette ever. General Motors isn't releasing all of its performance stats just yet, but we do know some tasty tidbits. Namely: 755 horsepower and 715 pound feet of torque in a package that weights 3,650 pounds.

Chevy officials promise that the ZR1 will do better than 210 miles per hour, and with 105 more horses and 65 pound-feet more torque, it's not unreasonable to suspect that it will be quicker to 60 mph than 2.95 seconds, GM's official time for the Corvette Z06. (For added perspective, 715 is roughly two-thirds more horsepower than the 455 in the base Stingray).


Of course, the ZR1 isn't just a case of cranking up the boost on the Z06's 6.2-liter LS9 V8. On the contrary, the powertrain has been comprehensively reworked from its air and fuel delivery systems on through its exhaust, with the goal of creating more power up and down the rev range. Despite being "conservatively spec'd," Corvette chief engineer Tadge Juechter says, "after you drive this car for a while, a Z06 feels really sluggish, like it can barely get out of its own way." He only sounds like he's half joking when he says to us assembled journos.

Not only have significant upgrades in breathing capacity necessitated major changes to the ZR1's front end, aero changes have been carried throughout the bodywork, all the way to the rear end. You'll hear a lot of that word in this story: "necessitated." As it turns out, when building an envelope-pushing supercar, solving one problem often creates another technical challenge to be surmounted.

As you can see from these images, the ZR1's resulting bodywork is incredibly aggressive, from a completely unique front clip featuring markedly bigger air inlets and front splitter (that incorporates a Corvette-first underwing) to a massive, high-set rear airfoil that's part of an option package.


One of the biggest challenges for the ZR1 was working out improved cooling for the 2.65-liter Eaton supercharger that's 52-percent bigger than the Z06. That in turn necessitated sourcing a 95-millimeter throttle body — GM simply couldn't find one big enough anywhere that could produce a large enough throttle opening to keep from choking the engine, so it had to design its own.

Case in point: Chevrolet learned the hard way with this car's Z06 forebearer that too much cooling is just enough. Embarrassingly, the company suffered a small but statistically significant number of heatsoak/overheating-related issues reported by Z06 owners at racetracks, a development that forced the company to make some changes for the 2017 model year.

That shouldn't be a problem with this new ZR1. It boasts no fewer than 13 heat exchangers, including a pair of additional radiators on each side of the nose. That key addition along with the bigger supercharger changed the weight distribution on the car, so Chevy compensated by widening the front wheels by half an inch for better grip. That, along with the need for more fresh air and a higher hood to clear the supercharger necessitated that the ZR1 would get all-new front bodywork — no Z06 bits would fit.


The hood, what with its bare carbon midsection. It may look like one piece, but it's not — that's the top of the intercooler cover poking through. That's right, the ZR1 has a shaker hood. It couldn't have been easy to engineer this solution and still effectively manage any air and drainage concerns. You can practically hear the mix of pride and weariness in Juechter's voice when he speaks of the difficulty in bookmatching the carbon-fiber weave between the hood itself and the intercooler cover.

Better breathing is only half the solution, of course: to get more power, you need more fuel, and that necessitated the development of a new duel fuel injection system, a first for Corvette. Like the Stingray and Z06, the LS9 in the ZR1 relies on direct injection, but it has a supplemental port injection, too.

Transmission-wise, Chevy's 7-speed rev-matching manual will come standard, but GM has chosen to make an 8-speed automatic optional for the first time on a ZR1 — the new 10-speed from the 2018 Camaro doesn't fit. The paddle-shift 7-speed gearbox has received numerous upgrades to improve shift times, and Juechter says those upgrades will filter back down through the rest of the Corvette lineup.


Let's go back to the aerodynamics for a moment, because if you're like me, you can't stop staring at that wing. It's actually part of an option ZTK Performance Package, which incorporates a unique front splitter with tall carbon-fiber end caps, as well as specific chassis and Magnetic Ride Control calibrations and Michelin Pilot Sport Cup 2 summer rubber.

The wing itself was codeveloped with Corvette motorsports partners Pratt & Miller, and its angle of attack is manually adjustable up to five degrees. Those tall stanchions bolt directly to the chassis for maximum effect, and the wing itself can deliver upwards of 950 pounds of downforce at speed, yet it actually creates less drag than the "wicker bill" fencing on the Z06's wing. The uprights are actually so tall that Juechter says the rear wing clears the rear window so that you can still see out back, but cargo room does take a hit.

The Corvette Z06 sounds plenty snarly, but the new ZR1 promises to go a step further. It still has the former's active clapper valves to sound more socially acceptable around town, but new internal passive valves help build sound more progressively, so it's not an all-or-nothing auditory experience. "It's brutal when you're in track mode and you're revving on it," says Juechter.


According to Tom Peters, director of exterior design for GM, customers have been clamoring for a new orange paint option, so for those buyers, Chevy has developed the decidedly unsubtle Sebring Orange Design Package shown here. It includes Sebring Orange Tintcoat paint, as well as matching brake calipers and accents on the rockers and splitter. Inside, orange seatbelts play off carrot-colored stitching, and there's unusual bronze-finish aluminum interior trim accents, as well.


Most of the Corvette range's other options, including competition sport seats, Bose premium audio and Chevy's trick Performance Data Recorder are also available. After years of downmarket interiors fitted with uncomfortable seats and cheap plastics, the C7 generation took huge strides to make living with a Corvette on a daily basis not just easier, but more enjoyable.


No word yet on price, but it won't be cheap — the C6 ZR1 was about $110,000, and this one should be priced appropriately for a model that will likely only see two or three thousand examples built per year.

Despite repeated pestering, company officials still won't talk about the much-rumored mid-engined Corvette that's still in the pipeline. But the 2019 ZR1 that hits dealers in spring not only looks good enough to be more than just a placeholder until that car arrives, it looks like formidable competition for both track day and valet stand honors — even here in Dubai...."


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Re: Corvette C7 ZR1

Post by chiroky » Sun Nov 12, 2017 5:11 pm

C'est juste le bumper avant qui est un peu too much, le reste est pas mal du tout.
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Re: Corvette C7 ZR1

Post by 123go » Sun Nov 12, 2017 6:44 pm

Le vidéo: https://youtu.be/akz_jYLG6ag" onclick="window.open(this.href);return false;

Rien de ce qui a été ajouté n'est pas destiné à améliorer la performance, rien...Tout a été pensé en ce sens.




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Kia Sorento 2011 EX-Luxe Arctic White, 3.5 L V6-276 HP
Corvette Grand Sport 2010, manuelle 6 vitesses, Torch Red décapotable, 6.2 L V8-436 HP - Remisée jusqu'au 1er mai 2019

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