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Behind the mysterious sabbatical year of the America's best sports car.
With its rare production models, classic racers and intriguing concept cars, the National Corvette Museum in Bowling Green, Kentucky, will impress even casual car enthusiasts. Indeed, in the midst of all this automotive flash, an ordinary, seemingly normal, white model from the fourth generation of car design – "C4" to the cognoscenti Corvette – might not give the impetus.
But that surely raises the eyebrows.
This C4 is anything but normal. It's a 1983 Chevrolet Corvette, very unusual since there was no Corvette for the 1983 model year. For its 30th anniversary, the oldest sports car in the United States, designed to display the speed, power and ingenuity of the United States in a traditionally car-dominated class. European countries, took a somewhat mysterious sabbatical year.
But why?
The model year that was not – and the car that was not supposed to be
Originally planned as a 1982 model, the fourth-generation Corvette, by far the most advanced of the era, was initially pushed back to the introduction of the fall of 1982 as a model of 1983, then in the spring 1983, while ambitious upgrades were slow. At that time, Chevrolet had decided to designate the 1983 Corvette by 1984.
The museum's white car, however, is an authentic 1983 Corvette, the only one in the world. How did it happen? Built June 28, 1982, it was the fourth of 43 "pilot-mounted" vehicles designed to validate production processes and other engineering, testing and training goals. The current practice of the sector is to crush these vehicles once this work is completed because they can not be sold to the public.
Forty-two of the C4 pilot cars have experienced this spell, but one of them, known as RBV098, has passed by. In 1984, a new factory manager found her parked outside, neglected. He had it cleaned and exposed. He also got an American flag pattern painting job, which was subsequently replaced by the original white. When the museum opened in 1994, General Motors loaned RBV098 and finally donated it. RBV098 is now a unicorn, an artifact of one of the most radical improvements Corvette ever made.
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Corvette was going through its biggest generation change to date.
For Corvette, the 1983 model year proved to be more of a "leap year" than a sabbatical year. With extraordinary advances in chassis engineering, aerodynamic design and overall performance, the C4 seemed to have a decade ahead of the C3 that it was replacing. And that's an understatement.
Introduced for 1968, the C3 was essentially a redesigned body and interior on the chassis of the C2 Sting Ray, which dated back to 1963. A dream car for many, the Corvette C3 has generated many sales for the parent company General Motors in the 1970s. But this third generation left a different impression on some enthusiasts. The primitive exhaust emissions technology of the late 70's and early 80's – think of the classic carburetors and dispensers – with tarnished performance. Additional safety features have inflated the weight of the car. And while the 1960s and '70s Corvettes could still impress with power and speed, they often lacked precision in terms of handling, ride comfort, overall refinement and build quality. In his road test of a '79 model, Driver According to the magazine, "the time has come to pass the crossed flags to the next generation".
The C4 has been designed to be more competitive in these areas than high-end European sports cars. And at Chevrolet, the transition was already beginning.
The revolution was delayed, in part, by the roof panels.
GM's commitment to the fourth-generation Corvette included the construction of a new assembly plant at Bowling Green, which would replace the 1920s St. Louis factory, which had been manufacturing Corvettes since then. 1953. Located one kilometer from where the museum would be built, the factory was ready in the summer of 1981 – but the new Corvette was not.
A series of new technical advances has delayed the development of the C4, which means that the C3 would live an extra year, built in the new plant. The 1982 Corvette debuted in the C4 category, including Cross-Fire fuel injection for the proven 5.7-liter V-8 engine, and GM's new four-speed automatic transmission. The 1982 Corvette Collector's Edition also featured a one-piece glass hatchback, which all C4s would get.
The rest of the C4 would be brand new. Engineers still used fiberglass for the body and steel for the structure. While the bodyshell style instantly said "Corvette," the frame was way more exotic than the C2 / C3 chassis, and it probably caused the biggest delay in the C4's gestation.
The C4 was originally designed to use two-piece removable roof panels, separated by a central bar connecting the windshield to the rear roof structure, as on the C3. With development well underway, Chevrolet General Manager Lloyd Reuss has decided that the roof should be a one-piece removable panel, like the Porsche 911 Targa and the Ferrari 308 GTS seen screaming every week on TV screens. "Magnum PI".
It would have taken almost a year to rearrange the chassis to fit the one-piece roof. Higher sidebars were needed to add chassis strength that had been lost with the removal of the T-bar, creating higher door sills making it more difficult to climb and descend in the Corvette.
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According to all reports, the result was worth it.
The C4 has definitely changed the situation. His body, 8.5 inches shorter than the C3, sported fewer curves to improve aerodynamics. The wheelbase (2 inches shorter) enhances the agility of the car, while the body (2 inches wider) adds room to the interior. The C4 also weighed about 150 pounds less than the C3, which improved its performance.
The opening of the large one-piece "clamshell" hood, which incorporated the upper wings, revealed a motor compartment as detailed as that of Europe.
Below, the chassis used transverse fiberglass blade springs (on the side) at the front and back. This unusual choice proved to be very effective and would also be used on C5, C6 and C7 corvettes. With standard Goodyear Eagle VR50 "gatorback" tires on 16-inch wheels, the Corvette had a staggering 0.90 g cornering performance. Driver the magazine noted was one of the best in the world.
Driver also noted that the Corvette suffered less than 7 seconds from 0 to 60 m.p.h. acceleration and 140 m.p.h. Top speed ranks it among the six fastest production cars in the world at the time. The magazine concluded, "The Corvette is a really tough car. That's all feverish acolytes wanted so desperately that their fiberglass fossil is a real world-class sports car, full of technical sophistication. "
Other media have also been captivated. Motor trend named the 1984 Corvette "Car of the Year".
Nevertheless, there was room for improvement.
There were complaints, however. The new "4 + 3" gearbox, a 4-speed manual gearbox that automatically drove overdrive on the top three speeds to reduce fuel consumption, was a clumsy operator. Most of the customers were stuck in the standard automatic gearbox.
The optional Z51 Special Performance Handling Package gives the Corvette incredible agility at the price of a frantic race. the digital dashboard was entertaining but hard to read in the sunlight. And as with previous Corvettes, there were some crunches and rattles.
Nevertheless, the 1984 Vette (at the time, the MSRP: $ 21,800) was a huge success, with 51,547 units built during an 18-month extended model year. (The record year for Corvette sales remains 1979, with 53,807 sales.) The C4 would then have a lifespan of 13 model years, while Chevy would produce a steady stream of significant upgrades, including models. ZR1 and Grand Sport high performance. versions. Not bad for a car that missed its first birthday almost a year.
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