The Chevrolet Corvette Odyssey: From Concept to Icon in the Mid-Engine Saga

The Corvette’s journey to becoming a mid-engine supercar began in 1962, during the development of its second generation, the Corvette Sting Ray. The vision was spearheaded by Zora Arkus-Duntov, known as the “father of the Corvette,” and his team. Despite not being involved in the very first Corvette roadster, Duntov played a crucial role in the brand’s evolution. The mid-engine car’s sleek design was the brainchild of Larry Shinoda and Anatoli Lapine.

Ambitious plans were set to place the future Corvette supercar alongside racing legends like the Ford GT40 and Ferrari, both known for their mid-engine designs. The first prototype, the Chevrolet CERV II (Chevrolet Engineering Research Vehicle), emerged in 1964. It boasted an experimental 6.2L V8 aluminum engine with overhead camshafts and fuel injection, pushing around 500 hp. Notably, it was all-wheel drive, each axle equipped with its own two-stage automatic transmission.

Initial tests yielded impressive results: the prototype accelerated to 60 mph (97 km/h) in about three seconds, with a top speed of 322 km/h. However, Chevrolet’s management did not pursue the project further, leaving CERV II as a singular marvel. In 1970, it was repurposed to test the upcoming ZL-1 engine, losing its original powertrain in the process, but thankfully, the prototype survives to this day.

The XP-819 project ran parallel to CERV II, breaking Corvette conventions with its rear-engined design. Engineer Frank Winchell, inspired by Porsche’s success, led the project, though Arkus-Duntov was initially skeptical. The XP-819, built in 1964, featured a backbone frame and a boat’s aluminum V8 engine. Unusually wide tires were fitted to counterbalance the rear-heavy design. However, standard Corvette wheels led to a severe crash during high-speed testing, ending the rear-engine exploration in Corvette’s history.

Yet, this setback led to a breakthrough. Larry Shinoda’s striking design of the XP-819 prototype was later adapted for the third-generation Corvette Stingray. The crashed sports car was eventually bought and restored by an enthusiast, albeit with a standard cast-iron block engine, giving the XP-819 a unique “wheelie” capability during acceleration.

The mid-engined Corvette concept continued to evolve within General Motors. Engineers and designers experimented with various models and full-scale mock-ups. One significant development was the Chevrolet Astro II (XP-880), unveiled at the 1968 New York Auto Show. This prototype featured a backbone frame, common GM suspension parts, a nearly stock 7.0L V8 engine, and a fully finished interior, suggesting that mass production was within reach. However, the use of standard components, especially the transmission from the front-engine Pontiac Tempest, and inadequate cooling solutions due to aesthetic considerations, were significant drawbacks.

Despite these challenges, the Chevrolet Astro II made waves at exhibitions, encouraging continued development of the mid-engined Corvette. In 1969, the Chevrolet XP-882 prototype with an angular design was introduced, featuring a transversely mounted V8 engine behind the seats and a modified three-stage automatic transmission from the Oldsmobile Toronado. This new design received public acclaim, though the existing Corvette Stingray, launched in 1968, was already successful in the market, delaying the need for a replacement. As a result, mid-engined designs remained a future prospect for GM, leading to further experimental endeavors in the field.

Chevrolet’s pursuit of a mid-engine Corvette continued with innovative solutions. The XP-895, built in 1972, showcased an aluminum body crafted by Reynolds Metals Company. This prototype was technically similar to its predecessor, but GM was also exploring the potential of rotary engines, an idea many carmakers, including GM, were experimenting with at the time.

In 1972, the Chevrolet XP-897 GT prototype was born, a compact coupe based on a Porsche 914 chassis with a 180 hp rotary-piston engine and a distinctive body. Fast forward to 1973, and the radical Chevrolet Corvette Four Rotor concept was unveiled at the Paris Motor Show. It boasted two dual-section engines working in tandem, delivering an impressive 360 hp, and featured a wedge-shaped body with lifting doors.

However, Zora Arkus-Duntov, initially against the rotary engine concept, was proven right. Road tests revealed the rotary-powered Corvette’s inadequate dynamics and excessive fuel consumption, leading GM to abandon the rotary sports car project.

The mid-engine concept, however, found new life in the Chevrolet Aerovette. Introduced in 1976, the Aerovette blended a classic V8 engine with a slightly modified design. Rumors swirled about the Aerovette becoming the 1980 Corvette, but it never materialized, and the fourth-generation Corvette maintained a traditional layout.

The mid-engine theme resurfaced in 1985 with the debut of the Chevrolet Corvette Indy. A technological marvel, it featured a composite monocoque, carbon fiber and Kevlar body panels, and advanced hydropneumatic suspension. The heart of the Corvette Indy was a 2.65L V8 engine with twin turbochargers, developed by Lotus Engineering. Despite its over 600 hp output, the Corvette Indy remained a concept, with GM producing three prototypes for exhibition purposes.

In 1990, the Chevrolet CERV III emerged as a direct descendant of the Chevrolet Engineering Research Vehicle II. The CERV III featured a highly aerodynamic body and a 5.7L V8 engine with two turbochargers, producing 650 hp and reaching speeds of 362 km/h. It showcased a six-gear transmission system combining a Hydramatic “automatic” with another two-stage gearbox, all-wheel drive with an inter-axle differential, and dual brake discs on each wheel.

Despite its groundbreaking features, the CERV III remained a prototype, with a production cost estimated at around $400,000 in the early nineties. To this day, it stands as the last mid-engine Chevrolet, and while camouflaged prototypes with forward-shifted cabins have been spotted over the years, none have made it to production, with the sixth (2004) and seventh (2013) generation Corvettes retaining the classic layout.

Photo: autowp.ru | GM Company

This is a transaltion. You can read the original article here: Среднемоторный Chevrolet Corvette: 57 лет экспериментов