People · Zora Arkus-Duntov · Chapter 5 of 11

“No Dog Anymore”

Pikes Peak, Colorado — September 1955

The two sedans in the paddock look like they lost a fight with a paint store — zebra-striped, wearing clumsy tacked-on fender extensions, badges taped over. The camouflage is the point: these are pre-production 1956 Chevrolets, two months before the public is allowed to see one, and bolted amidships in each is Ed Cole's 265 V8 wearing Zora's newest weapon — a high-lift camshaft of his own design. With NASCAR officials certifying the run, Zora hurls one up the 12.42-mile dirt climb to the summit in 17 minutes, 24.05 seconds — a stock-car sedan record, smashed by more than two minutes, set in a car that officially did not exist yet. Chevrolet's ad men nearly weep with joy.

It is the proof of concept for Zora's whole December-1953 doctrine: build it, race it, publicize it, sell it. Now for the main patient. The Corvette itself needs a number nobody can argue with, and Zora knows exactly which one: 150 miles per hour, a figure with mythic weight in 1956 America.

Daytona Beach, Florida — January 1956

The laboratory is a test mule with the windshield swapped for a Perspex sliver, a tonneau over the passenger side, and a tail fin behind the driver's head; the dyno is the hard-packed sand of Daytona Beach at dawn, where the measured mile is timed in both directions and the surface changes with every tide. The secret sauce is the cam — soon to be immortalized on order sheets and speed-shop counters alike as the Duntov cam, the part that turned the 265 into a 240-horsepower screamer and made its creator's name a catalog item.

The sand is treacherous, the mule twitchy at speed in ways that would alarm a sane man. Zora runs anyway: 150.583 mph through the flying mile, NASCAR-timed, headline-ready — a number no showroom badge from Detroit had ever carried onto the morning sports pages. His verdict afterward was pure Zora, delivered in that Russian-French growl:

“The Corvette was no dog anymore.” — Zora Arkus-Duntov

He wasn't alone on the sand that winter. Air-show legend Betty Skelton — three times national aerobatic champion, soon to be crowned America's “First Lady of Firsts” — ran a Corvette prepared by Zora and Smokey Yunick through the flying mile at 137 mph, and finished second in the stock class. Chevrolet had discovered its other great marketing truth: the Corvette photographed best at full throttle. (Her own remarkable life gets the full telling in Betty Skelton's profile.)

Sebring, Florida — March 1956

Records impress; racing convinces. At the 12 Hours of Sebring that March, a semi-works team assembled around racer-engineer John Fitch entered four Corvettes against the world's sports-racing elite. The #1 car of Fitch and Walt Hansgen survived twelve brutal hours to win its class and finish ninth overall — the Corvette's first class victory in top-flight international road racing. Barney Clark at Chevrolet's ad agency turned the result into one of the great car advertisements of the century. Its headline, borrowed from boxing, printed the car's new birth certificate: “The Real McCoy.”

One horsepower per cubic inch

The 1957 model year delivered Zora's masterstroke of production engineering. Working with GM engineer John Dolza, Chevrolet perfected the Rochester Ramjet mechanical fuel injection — no carburetor, just metered fuel sprayed toward each intake port. Atop the enlarged 283 V8 it produced 283 horsepower, letting Chevrolet advertise a magic ratio Detroit had never before offered the public in a production V8: one horsepower per cubic inch. The same year brought a four-speed manual and, for those who could read an order sheet, RPO 684 — a heavy-duty brake and suspension package that was a race kit with a part number. Sales tripled from their 1955 deathbed.

In four years, a car that GM's own accountants had measured for a coffin had become America's legitimate sports car — with records on the mountain, on the sand, and at Sebring to prove it. Zora's reward was the assignment of his dreams: permission to build a pure racing Corvette to take on Ferrari and Jaguar at the highest level.

It would become the most beautiful heartbreak of his first decade at GM.