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2014 Chevrolet Camaro Z/28

March 24, 2014

2014 Chevrolet Camaro Z/28

In 1967, the most-powerful engine in a factory Camaro was a 396 cid V8 making 375 horsepower. In preparing the original Camaro Z/28 for road racing, engineers utilized a lighter 302 cid V8 officially rated at 290 horsepower — making it the ideal choice for sports-car racing.

Fast forward to 2013: the most-powerful Camaro is the ZL1. It features a 6.2 liter supercharged LSA engine making 580 horsepower. With the return of the Camaro Z/28 for the 2014 model year, the car is more powerful and more capable then ever. And like the original Camaro Z/28, the 2014 Z/28 trades ultimate horsepower and torque for improved weight balance and track performance while utilizing a lighter, naturally aspirated 7.0L LS7 first introduced in the Corvette Z06.

2014 Chevrolet Camaro Z28

2014 Camaro Z/28 Powertrain: Engine, Horsepower, Torque & More

Powering the 2014 Camaro Z/28 is GM’s 7.0 liter (427 cu. in) LS7 V8 engine that delivers at least 500 horsepower (373 kW) and 470 lb.-ft. of torque (637 Nm).

According to Jordan Lee, Small Block chief engineer and program manager at General Motors, the “LS7 is ideal for road racing because it delivers amazing performance in a compact, lightweight package. The broad torque curve and high redline of the LS7 mean fewer shifts are required for each lap, while the lightweight design improves the front-to-rear weight balance for better handling.”

The 7.0 liter LS7 (427 cid) is hand-assembled and was co-developed with Corvette Racing. It utilizes several high-performance components, including:

  • Titanium intake valves and connecting rods, and sodium-filled exhaust valves
  • CNC-ported aluminum cylinder heads
  • Forged-steel crankshaft and main bearing caps
  • High-lift camshaft
  • Hydroformed exhaust headers
  • 11.0:1 compression ratio, and a 7,000 rpm redline
  • 10.5-quart, dry-sump oiling system
  • Unique induction and exhaust systems

Other components of the Z/28′s powertrain include:

  • Racing-style, cold-air induction system and large K&N air filter to provide maximum air flow
  • Standard dual mode exhaust system and larger-diameter pipes enable improved air flow. By bypassing the mufflers during acceleration, the system increases both the torque and sound generated by the LS7 engine
  • Limited-slip differential with a helical gear set that works in unison with Chevrolet’s Performance Traction Management system
  • Cooling systems for engine oil, transmission, and differential
The impressive power produced by the LS7 in the 2014 Camaro Z/28 is distributed to the rear wheels via a limited-slip differential featuring a helical gear set, not traditional clutch packs. The new design enables the driver to apply more power and get through corners faster by continuously adjusting the torque bias to maximize available traction. The differential works in conjunction with Chevrolet’s proprietary Performance Traction Management system (PTMS). The system allows drivers to adjust the level of throttle and brake intervention to match their capability and driving environment.
Chevrolet made it a point to mention the following: “Unlike some competitors’ “track package” offerings, the Camaro Z/28 makes standard all the cooling systems required for track use.” Specifically, the cooling systems in question include the dry-sump oiling system for the LS7 that is connected to an integral liquid-to-liquid cooling system for engine oil.

There is also a second liquid-to-liquid system to cool the transmission and differential. This system pumps overcooled transmission fluid to a heat exchanger in the rear differential before traveling to the transmission. This reduces differential temperatures as much as 100 degrees F (37.7 degrees C).

2014 Chevrolet Camaro Z28

2014 Camaro Z/28 Transmission

The Camaro Z/28 comes exclusively with the Tremec TR6060 manual transmission. The six-speed gearbox features close-ratio gearing and 3.91:1 final drive ratio, both optimized for the power characteristics of the LS7 V8.

2014 Chevrolet Camaro Z28

2014 Camaro Z/28 Engine Note, Exhaust Note

The Z/28′s 7.0 liter LS7 V8 is sure to have an inspiring exhaust note. So far, we have been able to get two instances of the car’s exhaust sound:

2014 Camaro Z/28 Exterior & Aerodynamics

The 2014 Camaro Z/28 incorporates a full aerodynamics package designed to produce downforce at track speeds. At the front, a large splitter is connected to an underbody panel that reduces lift; the aerodynamics are further improved with fender flares over the front and rear wheels, along with rocker panels that assist in attaining aerodynamic stability. An aggressive rear spoiler and functional diffuser round out the aerodynamics package.

2014 Chevrolet Camaro Z28

2014 Camaro Z/28 Interior

Inside, the 2014 Camaro Z/28 features several unique features, including:

  • A distinctive, matte-metallic trim called Octane
  • Flat-bottom steering wheel shared with the ZL1
  • Standard Recaro seats with microfiber suede inserts and aggressive bolsters for high-performance driving; the seats also have cutouts inspired by the five-point harnesses found on racing seats; both front seats utilize manual levers for adjustment to save weight
  • Modified rear seats optimized for weight reduction: nine pounds (four kilograms) were saved by removing the seat-back pass through as well as using high-density foam in place of the rigid structure of the seat back and steel mesh of the seat bottom

“Unlike the Ford Mustang Boss 302, we felt it was important to keep the 2+2 configuration of the Camaro Z/28 as Chevrolet already has a world-class two-seat sports car in the Corvette,” said Camaro chief engineer Al Oppenheiser. “By modifying the construction of the rear seat, we were able to reduce the overall weight of the Z/28 while still preserving the flexibility of 2+2 seating.”

2014 Camaro Z/28 Weight Savings

To optimize the 2014 Camaro Z/28 for the track, Camaro engineers creatively removed mass from the vehicle, or what General Motors calls “an intensive lightweighting program”. The efforts resulted in a 100 pound (45 kilogram) decrease in curb weight compared to the naturally aspirated Camaro SS and 300 pounds (136 kilograms) when compared to the supercharged Camaro ZL1.

“We looked at every subsystem for opportunities to save weight,” said Oppenheiser. “Our goal was to get rid of everything that didn’t make the car faster, and keep only what was required by law. For example, we wanted to eliminate the audio system completely, but we had to keep a single speaker for the seat-belt chime to meet safety requirements.”

Examples of weight saving techniques include:

  • Eliminated the tire-inflator kit, except for Rhode Island and New Hampshire, where it is required by law
  • Removed interior sound deadener, and carpeting from the trunk
  • Replaced the standard LN4 battery with a smaller, lightweight, LN3 battery
  • Specified thinner, 3.2-mm glass for the rear window, compared to 3.5-mm glass on the standard Camaro
  • HID headlamps and foglights are not available
  • Air conditioning is only available as a stand-alone option

“The team was so fanatical about saving weight, we even stripped the unused wiring out of the harness when we eliminated the fog lights, speakers, and air conditioning,” said Oppenheiser. “Every ounce saved contributed to making this the most track-capable Camaro we have ever built, and a worthy successor to the Z/28 name.”

2014 Camaro Z/28 Chassis

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.

2014 Camaro Z/28 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.

2014 Chevrolet Camaro Z28

2014 Camaro Z/28 Brakes

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.

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.

“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.”

 

 

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One Comment leave one →
  1. March 27, 2014 4:43 pm

    Only a enthusiast would buy one. For the asking price, there is a lot of choices…

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