Historical Background
The 47-year history of the Corvette is packed with stories and
legends, and the Z06 and LS6 designations that today's Corvette
Team has chosen to identify the hottest Corvette to-date and its
385-hp engine are not new. They are terms from Corvette's glorious
past, and it was precisely for that reason that these designations
were chosen - to recognize and pay homage to the significant accomplishments
of past Corvette Teams.
Zora Duntov's Z06
Today's Z06 is the evolution
of a concept first put forward by the legendary Zora Arkus-Duntov.
In 1962, GM was observing the
Automobile Manufacturers Association's ban on all forms of competitive
activity, a ban that had been in effect since 1957, and Zora was
chafing under its restrictions. As every student of Corvette history
knows, Zora delighted in finding ways to circumvent authority and
go fast at the same time. In 1963 this rebellious streak manifested
itself in the form of the Z06 RPO (Regular Production Option) ...
a package specifically designed for competition-minded Corvette
buyers who could order a race-ready model with just one check of
an option box.
The
Z06 RPO debuted on what was then a startling new Corvette, the 1963
"split-window" Sting Ray coupe, a car that would go down in Corvette
annals as a defining moment in more ways than one.
The Z06 package was not a cheap
date in those days. It added $1,818.45 to the Sting Ray's $4,257.00
base price. In addition, Z06 required $661.75 in forced content,
including the optional fuel injection ($430.40), four-speed manual
transmission ($188.03) and Positraction rear axle ($43.05). All
together it resulted in additional option costs of $2,480.20, or
58-percent of the Sting Ray's base price.
Included in the Z06 package
were Al-Fin power drum brakes with sintered-metallic linings (four-wheel
disc brakes would not be offered until the 1965 model year), heavy-duty
front and rear stabilizer bars, stronger shocks, much stiffer-than-stock
springs, a dual master brake cylinder, and a long-distance 36.5
gallon gas tank for endurance racing.
As a reflection of Zora's determination
that the Sting Ray coupes be GT-class or SCCA contenders, the Z06's
debut was particularly auspicious. In the fall of 1962, a group
of Z06-equipped Sting Rays headed west from the St. Louis factory
to California. They were driven by Bob Bondurant, Dave McDonald,
Jerry Grant and Doug Hooper. The destination was the Riverside Raceway
and the Los Angeles Times Three-Hour Invitational Race scheduled
for October 13, 1962. The drive served as the break-in period for
the powertrains, and upon arrival the cars were race-prepped for
the event. Bondurant, McDonald, Grant and Hooper would also do the
on-track driving honors.
As luck would have it, that
race also marked the debut of Carroll Shelby's soon-to-be-legendary
Ford-powered British sports car known as the Cobra. The gauntlet
was well and truly thrown.
In what must have been a moment
of pure ecstasy for Duntov, one of the Z06 Sting Rays, owned by
Mickey Thompson and piloted by Doug Hooper, took the checkered flag
for an out-of-the-box win. Even Mickey Thompson seemed stunned,
reportedly exclaiming, "I don't think it's ever been done before
... a new production car winning the first time out."
Ultimately, only 199 Z06-equipped
Sting Ray coupes were produced, making it one of the rarest and
most collectible Corvettes of all time. And even though the package
was eventually offered for the Sting Ray convertible (with an option
price of $1,293.95), records indicate that no such cars were built.
Later on Zora Duntov stated,
"Suitably equipped and set up, the new Corvette promises a
potential that is hard to equal or surpass by even the world's costliest
cars. To make the Corvette this kind of vehicle is the goal of Chevrolet's
engineering personnel."
Almost 40 years later, those
words could be used without alteration to describe the target that
today's Corvette Team aimed for in the development of the 2001 Z06.
Another Corvette Legend: The 1971 LS6
The
LS6 engine RPO has been offered once before in Corvette history, but
only for one model year (1971). With 454 cubic inches (7.4 liters), a
cast-iron "big-block" and aluminum heads, the first LS6 was second only
to the full-blown L88 racing engine offered from 1967 through 1969 - in
terms of both power and legend.
The original LS6 produced 425
bhp (gross) and was the most powerful engine offered in 1971. Only
188 cars were produced with this powerplant, less than one-percent
of Corvette's 21,801-production run for the year. The option price
was $1,221.00, or 22-percent of the coupe's $5,496.00 base price.
When tested by a leading automotive
magazine, an LS6 with a four-speed manual and a 3.36:1 limited-slip
differential produced the following numbers:
Also in 1971 a ZR2 package
was offered. It was priced at $1,747.00 and included the LS6,
a heavy-duty, close-ratio four-speed manual transmission, heavy-duty
power brakes, transistorized ignition, lightweight aluminum radiator,
special springs, shocks, and front and rear stabilizer bars. A
total of only 12 ZR2-equipped Corvettes were produced, making
them even rarer than the Z06 models
referenced earlier.
Because of what they've accomplished
with the new Z06 and LS6, today's Corvette Team members are sure
that somewhere Zora Arkus-Duntov is smiling.