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Engineers made the most of every component of the 2014 Camaro Z/28′s chassis for track use, allowing it to achieve up to 1.05 g in cornering performance, and 1.5 g in deceleration.
“We used the very best components in the industry to deliver uncompromised performance, lap after lap,” said Mark Stielow, Camaro Z/28 engineering manager. Over 200 changes were made to improve the Z/28′s track performance; these enhancements allow the Z/28 to achieve 1.05 g in cornering. According to Mr. Stielow, all other things being equal, increasing maximum grip from 1 to 1.05 g can cut up to four seconds per lap.
The Camaro Z/28 is one of the first production vehicles to feature race-proven spool-valve dampers. Compared to a conventional damper that only provides two-way tuning for bump and rebound, a spool-valve damper allows four-way adjustment to accurately tune both bump and rebound settings for high-speed and low-speed wheel motions. The wider tuning range allowed engineers to significantly increase the damper stiffness on the Camaro Z/28 without a significant change in ride quality. Other chassis changes include stiffer spring rates and suspension bushings for improved cornering response.
To take full advantage of the grip offered by the high performance Pirelli tires, powerful 500 horsepower LS7 V8 engine, and race-tuned chassis, the Camaro Z/28 features Brembo Carbon Ceramic Matrix rotors and fixed, monoblock calipers. The front 394 x 36 mm rotors are paired with six-piston calipers, while the rear 390×32 mm rotors work with four-piston calipers. The lightweight carbon discs save 28 pounds (12.5 kilograms) per car compared to similarly-sized two-piece steel rotors.
“What makes the Z/28 so addictive is it inspires confidence through every section on the track,” said Camaro Z/28 engineering manager Mark Stielow. “The incredible, balanced performance helps you carry much more speed through every corner: the brakes are so good you can adjust your braking points later and later; the grip and suspension damping allows you to carry more speed through the apex; and then the limited slip allows you to make the most of the LS7 as you power out of the corner.”
Wheels & Tires
The 2014 Camaro Z/28 rides on 19-inch forged aluminum wheels and tires that reduce unsprung weight by 42 pounds (19 kilograms) compared to the 20-inch wheels standard on the Camaro SS and ZL1. The smaller diameter wheels lower the car’s center of gravity by 33 millimeters — which contributes to improved handling.
All four lightweight wheels are wrapped in 305/30ZR19 Pirelli PZero Trofeo R tires, marking the first production application of the ultra-high performance tires; GM believes the rubber to be the widest front tire on any production car.
The combination of the grippy Pirelli PZero Trofeo R tires and Brembo Carbon Ceramic Matrix rotors allow the Camaro Z/28 to attain up to 1.5 g in deceleration. According to GM, the Z/28′s standard front brake cooling ducts allow make it capable of continuous track use unmatched brake feel.
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Source : http://gmauthority.com/blog/gm/chevrolet/camaro/2014-camaro/2014-camaro-z28/