CERV stands for Chevrolet Engineering Research Vehicle. GM’s CERV III (Corporate Engineering Research Vehicle III), which debuted in 1990, represented the evolution of the Corvette Indy Concept. The CERVIII is one of the most advanced concepts ever created. Never before has so much working technology crammed into one car for performance purposes. The cost to develop a car like the CERVIII would be astronomical.
Coming from a long line of mid-engine Corvette prototypes, the CERVIII was the final attempt towards a mid-mounted engine. Inspiration for the car’s design came from the Corvette Indy, released four years earlier than the CERVIII. Unlike this prototype, the Indy was a display model, incapable of being driven.
The body of the CERVIII is made of carbon fiber, Nomex, and kevlar, reinforced with an aluminum honeycomb. This material forms a one-piece composite unit. Highlighting the structure is an exceptionally low drag at 0.277 Cd.
Powering the car is a Lotus-tuned 5.7-liter V8. This engine, combined with the low-drag body, gives CERVIII a calculated top speed of 225 mph! Mahle pistons, stronger connecting rods, and twin Garett Turbochargers help the engine achieve 650 horsepower.
With such high-speed capability, a robust braking system is a must. On each wheel, a dual-disc setup is used. This creates a sandwich of brakes which effectively doubles the surface area. As a drawback, having eight-disc brakes instead of the usual four increases overall weight.
With the transmission setup, another innovation is achieved. Six forward speeds complement the CERVIII using two transmissions! That’s right; a three-speed Hydramatic unit is linked to a custom two-speed transmission resulting in six gears. With this setup, shifting is done automatically by computer control.
Power is transferred to all four wheels through a viscous-coupling system from the transmissions. This system helps achieve maximum traction by varying the torque to the front and rear wheels. No doubt, this setup is influenced by the Porsche 959.
Interestingly, of all the mid-engine prototypes made, the CERV III was the closest to production. Marketing plays a major role in decisions such as these, and the Corvette has little room for significant change. Like all the other mid-engine corvettes, the CERV III has never made it past the prototype phase. However, the styling cues were not lost. It was the 4th Generation Camaro that inherited the huge-by-wide front glass, rear hatch glass, and rear wing, and while the CERV III had a removable targa-type roof panel, the Camaro was available with a t-roof.
Source: Mario van Ginneken - www.corvettes.nl
Images: General Motors Archive; Concept Car Central, www.corvettefever.com
