MT, PR, Dubai, UAE - 14 May 2008.
ZR1: 103.53 hp per 1000cc of the
engine’s 6162 cc.
At the North American International
Auto Show in Detroit earlier this year, the 2009
Chevrolet Corvette ZR1’s power was only estimated at
a specific output of some 100 horsepower for each of
its 6.2 litres of displacement.
Now it's official: GM Powertrain
has completed SAE certification of the ZR1’s
supercharged LS9 V-8 and the results exceed the
estimate: 638 horsepower, or 103.53 horsepower
per 1000 cc of the engine’s 6162 cc (376 cubic
with “LS9 Supercharged” embossed
on both sides.
The maximum torque of 819
newton-metre gives a specific output of 132.91 Nm per
The LS9’s output is the most
powerful automotive production engine ever
manufactured by General Motors and enables the
Corvette ZR1 to achieve a top speed of more than 322
"Even with all that power,
(the Corvette ZR1) has road manners that will allow
our customers to enjoy it on the streets as a daily
driver, and on the track," said Chevrolet General
Manager Ed Peper.
The Corvette ZR1, which goes on
sale this summer, is complemented in the chassis by
heavy-duty components, including a six-speed manual
transmission with race-hardened gears and dual-disc
clutch technology that delivers exceptional clamping
power and lower inertia, as well as strengthened axle
Fuel economy testing has not been
completed, but engineers are confident the ZR1 will be
the most fuel-efficient 600-plus-horsepower car on the
cylinder block with iron
finish-bored and honed
with a deck plate
steel crankshaft with a
conrods and forged
rotocast cylinder heads
with 55 mm titanium intake
valves and 40.4 mm
with 14.1 mm lift for
excellent idle and
dry-sump oiling system
with 9.9 litres capacity.
oil cooler and
cover visible through the
hood window with unique
blue accents and “LS9
on the left and right
GM says the LS9 engine is
hand-built by specially trained technicians at GM’s
Performance Build Centre in Wixom, Michigan. It is a
unique, small-volume engine production facility that
also builds the Chevrolet Corvette Z06’s LS7 engine
and other high-performance GM production engines.
“Developing the LS9 involved more
than simply striving for a great horsepower number.
Endurance and reliability testing have shown the
engine to be robust and low-maintenance, just like
other engines in the small-block family,” said Sam
Winegarden, executive director, engine engineering for
The key enabler of the LS9’s
performance is the industry’s first production
application of a new, positive-displacement Roots-type
supercharger that has a unique four-lobe rotor design.
Its design promotes quieter and more efficient
performance, while the large, 2.3-litre displacement
ensures adequate air volume at high rpm. Maximum boost
pressure is 10.5 psi (0.72 bar). It is teamed with an
integrated charge cooling system that reduces inlet
air temperature for maximum performance.
“The combination of large
displacement and the new, four-rotor design broadens
the effective range of the supercharger, allowing the
engine to make more power at lower rpm and sustain it
throughout the power band,” said Winegarden.
A raised hood provides adequate
clearance for the LS9, while a polycarbonate window in
the hood provides a view of the engine beneath it.
Cadillac CTS-V -
Still with the LS V8 engine and performance, but
moving up, more in luxury than in power terms, the
2009 Cadillac CTS-V promises other achievments. In
testing at Germany’s Nurburgring, it completed a lap
of the legendary Nordschleife in 7:59.32 minutes. It
appears to be the fastest ever publicly documented
timing for a production sedan.
Cadillac CTS-V on the Nurburgring.
Cadillac is nearing the completion
of testing of the limited-edition high-performance
CTS-V. John Heinricy, GM Performance Division
executive and an acclaimed racing driver, piloted the
CTS-V through its sub-8 minute lap. The car itself was
equipped exactly as planned for consumer production.
Estimated at 550-hp, the CTS-V is
at the moment going through the final stages of
intensive testing and development. One of the
realistic objectives of the Cadillac team is to make
the CTS-V the world’s fastest production sedan, as a
part of the overall goal to make the V-Series Cadillac’s
ultimate expression of performance and technology.
More updates will be released as testing is finalized,
including the car’s certified SAE power ratings and
The eight-minute mark has long been
recognized as a major Nurburgring milestone, reserved
for race cars and the fastest exotic sports cars.
While there’s no single official repository for
Nurburgring data from private test sessions, numerous
reputable websites and publications report lap times
from race teams, automakers and independent sources.
The new 2009 CTS-V includes a new
version of Cadillac’s Magnetic Ride Control
suspension and the 6.2-liter Supercharged V8 engine
(LSA version), with a relatively smaller supercharger
capacity than the 2.3-liter of the LS9 version of the
For the first time, CTS-V will
include the choice of 6-speed manual or automatic
transmissions, with the new automatic sporting
steering wheel-mounted shift buttons.