Tag: Q-Corvette

1963 Aluminum 377 Small-Block Chevy Engine

Published on by Scott

Before the 1969 427 ZL1, there was the All-Aluminum 377 Small-block Chevy!

Dateline: 5-7-21, This story by K. Scott Teeters was first published in the October 2019 issue of VETTE magazine – In the early 1960s, an aluminum performance engine was as exotic as fuel injection, independent suspension, and four-wheel disc brakes. The first mention of an all-aluminum engine for a Corvette was in Zora Arkus-Duntov’s proposal outline for the Q-Corvette in 1957. Ed Cole was Chevrolet chief engineer from 1952 to 1956 and was the lead engineer in the design and development of the small-block Chevy.

The Wintersteen L88 Grand Sport #002 resides at the Simeone Museum in Philadelphia, PA. Part of the collection includes the hand-made #002 Roadster replica body and one of the all-aluminum 377 SBC engines that Dr. Simeone purchased from Jim Jeager. The replica body is mounted to a chassis buck with an interior.

Cole was a mechanical engineering visionary. After he became Chevrolet’s general manager in 1956, Cole announced his 1960 Q-Chevrolet concept that would put a transaxle into every car to improve traction and handling and eliminate the transmission hump that would open up the interior. Cole’s plan included the Corvette.

Even before going to work for Chevrolet, all Duntov wanted to do was to build racecars. Based on his racing knowledge, Duntov’s Q-Corvette was spectacular and included; a four-speed transaxle, four-wheel independent suspension, four-wheel disc brakes, and an all-aluminum fuel injected 283 engine. Duntov is usually credited with the all-aluminum small-block Chevy, a deeper look tells a slightly different beginning.

The design parameters of Cole’s SBC were that the engine should be; small, lightweight, simple, and inexpensive. Cole reasoned that an aluminum version of the SBC using a new aluminum-silicone alloy would be obviously lighter and probably less expensive to make. To keep costs down, there would be no valve seat inserts, no pressed-in valve guide inserts, or cylinder liners. But sometimes a simple idea turns out to not be so simple.

Problems started right from the beginning. The complex molds used sand cores and the completed castings required extensive machining. Sand-cast aluminum is high in porosity and low in density. During machining, cavities would open up in the castings, causing a high rejection rate, which drove up the cost.

Another indication that this is likely to be one of the Nassau Invasion 377s is the chrome stamped steel valve covers. Photos in the “Corvette Grand Sport” book by Paddock and Friedman from the race show the same valve covers.

Aluminum pistons on aluminum bores were hard to lubricate and would scuff the bores. Between the strength of materials and the casting challenges, pouring aluminum into molds designed for cast iron wasn’t going to work for mass production.

Weber carbs were THE hot setup in the 1960s before fuel injection became more efficient. The 377 used four massive 58mm side-draft carburetors. The “EW” on the float chamber cover stands for Edoardo Weber, the founder, and inventor of the Weber carburetor.

A few aluminum engines were completed. Duntov installed one in his CERV-I car in 1959, but the valves would freeze to the guides when the temperature went low. Mickey Thompson got an aluminum engine for an Indy car project and bored the cylinders to installed steel sleeves to reduce the C.I.D. to the Indy limit of 255-C.I.D.

Note the non-stock location of the alternator. This was to slightly lower the car’s center of gravity.

Roger Penske had TRACO modestly build an aluminum SBC to just 300-horsepower for his Cooper Monaco. When TRACO was done, the engine weighed just 350-pounds; the lightest of all the aluminum SBCs.

Forensic evidence gleaned from the book, “Corvette Grand Sport” by Paddock and Friedman indicates that based on the shape of the collector on the headers, this was most likely one of the engines used during the Nassau assault in 1963.

The original SBC was never designed to be cast in aluminum. So when exact copies were cast in aluminum, the basic weaknesses of the original design were obvious. In 1960 some Corvette brochures offered 275 and 315-horsepower fuel injection engines with aluminum heads but were canceled early in production due to breakage. Briggs Cunningham was to be given several sets of aluminum heads for his Corvette Le Mans assault, but none were installed.

When Duntov started planning his Lightweight Sting Rays in early 1962 to battle Shelby’s Cobras, the SBC had 327-cubic-inches. Duntov insisted on an all-aluminum 327, reasoning that the heavy-duty parts from the L84 Fuelie would be more than enough for his racing engine. Unlike the previous aluminum engines, steel cylinder liners were pressed into the block. After each block was machined, it was water-tested for leaks. If leaks couldn’t be fixed with welding they were scrapped.

The most significant change to the basic block was that the main bearing webs were thicker and four-bolt main bearing caps were used. The earlier aluminum SBCs were not delivering any significant power increases, so it was decided that more cubic inches were needed. A 4.00-inch stroke yielded 402-cubic-inches. However, experimentation showed that the engine was happier with a 3.75-inch stroke that yielded 377-cubic-inches. Notches had to be made into the insides of the block for connecting rod clearance.

Numerous cylinder head designs were considered. The wildest was a hemi head design with two spark plugs per cylinder. The hemispherical combustion chamber allowed for larger 2.20-inch intake and 1.72 exhaust valves. The intake system was a Rochester constant-flow fuel-injection unit. This was Duntov’s preferred engine for his Lightweight but never was developed or tested. Engineers expected 600-horsepower from the 402-cubic-inch configuration.

The Mark II big-block with its unique “porcupine” semi-hemi heads was in development, so engineers designed and cast similar sets of aluminum heads for the SBC. Initial tests showed that they did not flow as well as the standard wedge combustion chamber heads, so the concept was dropped. If the heads had been developed they could have been a game-changer and made it into production cars.

Twelve aluminum 377 blocks were successfully machined and designated “A” to “L”. When John Mecum took delivery of three Grand Sport Corvettes as part of his Nassau invasion, the cars had aluminum 377s with four 58-mm Webers. After the Grand Sports stomped the Cobras at Nassau, the cars were bought and sold at a brisk pace.

Engineers learned that the aluminum 377s were good for short races, such as Nassau, but not durable for long races, such as Sebring. When Penske raced Grand Sport #005 at Sebring in 1964, his car was powered by a steel version of the 377 and performed very well.

Several of the engines were sent to Jim Hall and installed into his Chaparrals. Hall was instructed to install the engines and not to change anything except for timing and settings for the Webers. The engines were plugged in, raced, and returned to Chevrolet for evaluation.

The inscription of the transmission is unusual and indicates that it was likely to have been a specially built unit. “W.O.26310” could have meant “Work Order”. “TRANS #7-B” could have meant the second rebuild of transmission #7. Also note that the bolts on the case side plate are aircraft safety wired. A special team at Chevrolet built all of the 377 engines, the safety wiring was likely a deterrent to tampering.

As the engines were raced, eventually nearly everything either failed or upon examination was soon to fail. For instance, when one engine threw a rod, engineers used a new process for making rods called, Vacuum-Induction Melt steel to insure no impurities in the raw forging. When bolts were magnafluxed and showed signs of stress, all bolts were then over-designed. Rocker-arm lube was another issue and there were electrical problems with the early-transistorized regulators and ignition amplifiers.

Note the serial number on the back of the block casting, “0240983” and the casting date, “8-20-63”. This “could” have been one of the engines used in the 1963 Nassau assault in early December 1963 that stomped on the Cobras.

Exhaust headers were showing signs of cracking at the ports due to metallurgical problems. This was fixed by using a different welding process. Camshaft gears were failing when dry-sump oil systems were installed. Excessive stress and wear on the camshaft drive gear caused the distributor to retard the timing; causing a drop-off in power.

Privateers raced all of the Grand Sports and many changes were made to the cars. One of the previous owners of the Simeone 377 built this expanded capacity oil pan. Original versions of the engines used as many stock performance parts as possible

The perceived advantage of the all-aluminum SBC was weight; the complete engine weighed 150-pounds less than a cast iron version, however, the aluminum engines didn’t make quite as much power. Because durability was such a serious issue, in the early years, development work went into durability.

Eventually, the aluminum SBC reached optimum development, priced itself out of racing, and didn’t contribute any parts that went into production engines. Close to the end, there was talk of an overhead-cam kit for the SBC, but no action was taken. The amount of money spent on the program was an accounting nightmare for sure. At best, all the problem-solving saved years of development time for the all-aluminum Can-Am block and the ZL1. In a sense, the all-aluminum SBC was a prehistoric ZL1, domed by the basic “bread and butter” design of the original SBC. – Scott

Reproductions of this post’s lead illustration of the All-Aluminum 377 Small-Block Chevy and the Grand Sport #005 are available as 11″ x 17″ prints, signed and numbered by the artist, CLICK HERE!

And for fans of the 1963 Grand Sport Corvette, we have LOTS of Grand Sport Corvette prints CLICK HERE!

 

Corvette’s Founding Fathers, Peter Brock, Pt 6 of 6

Published on by Scott

Peter Brock: The Man Who Penned the Sting Ray

Dateline: 2-28-19 – Images: GM Archives; Graphics & by K. Scott Teeters

Of the six men in our “Corvette’s Founding Fathers” series, Peter Brock had the shortest career at GM, but his contribution was enormous. Like all of the Founding Fathers, Brock had “gasoline in his veins” and was cut from the same cloth as Larry Shinoda; post-WW-II southern California, the birthplace of modern hot rodding.

Brock got the car bug at the age of 12 when he spotted a 1949 MG TC with a broken engine in back of the garage where he had his first after-school job. Brock studied the lines and mechanicals of the MG TD and at 15 bought the car. With help from his car pals, he got the car running. Brock’s second car was a 1946 Ford that he made into a fast, award-winning hot rod. Whereas Shinoda’s “Chopsticks Special” hot rods were scrappy-looking drag racers, Brock’s Hot Rod Ford was a sleek beauty that was quick at the drags and had class-wins at the Oakland Roadster Show in 1954 and 1956

.While pit crewing for some older car pals that were racing, Brock decided that he wanted to race, but Brock observed that racing was an expensive enterprise. He determined that he’d better first learn a trade. And since automotive design was his second passion, he’d have to go to Art Center College of Design.

Brock’s approach to getting into the school was stunning; he walked in and told the receptionist that he wanted to attend. The lady asked about his portfolio and Brock had to admit he didn’t know what a portfolio was. After she explained, Brock went to his car, created a series of drawings on blue-lined school paper, came back in after a few hours and said, “Here’s my portfolio.” He made his case that after a month, if his work wasn’t approved, he’d leave.

Brock didn’t see much value in life drawing, light and shadow, and graphics classes. But the “Transportation 101” class was exactly what he was looking for. With great teachers, classmates, and his enthusiasm, Brock was ready for his next big break. His only problem was that he ran out of money! GM Designer Chuck Jordan was then working as a headhunter scouting new talent. When Brock explained his situation to Jordan, he received a round-trip ticket to Detroit for an interview with GM, and later a job offer. Brock later said, “GM was like going to the best grad school. The best education a car designer could hope for.” At 19 Brock was the youngest designer ever hired at GM.

Brock couldn’t have been happier and would often work after hours. One evening Design Director Harley Earl entered the design studio and struck up a conversation with Brock. Earl asked Brock what he thought of GM’s design direction. Surprisingly, Brock told Earl that GM needed to look into the small car market because the Europeans was making inroads and GM needed a small “student’s car” for young people that couldn’t afford a new bigger car. Earl was intrigued. After several more evening conversations with Brock, Earl informed Brock that he was starting the XP-79 Cadet project and that Brock was to lead the design effort, under the direction of a studio boss! What an astonishing opportunity!

Brock went through the entire design process, from sketches, and line drawings, to a full-size mockup that looked like a small European GT. Earl loved the concept and expanded it to include a delivery vehicle. But when Earl showed the $1,000 Cadet concept at Styling’s 1958 line review meeting, there was dead silence. GM president Harlow Curtice said, “We don’t build small cars at GM!” The project was dead, but it did plant a seed that soon became the Corvair.

Harley Earl was about to retire, and his Olds Golden Rocket-like C2 Corvette concept was going nowhere. Around the same time the 1957 AMA Racing Ban killed all racing activity. But 46-year-old Bill Mitchell was about to take over as VP of Design upon Earl’s retirement, and had his own ideas of what the next Corvette should look like. The main Chevrolet design studio was where official GM advanced production designs were created, but Mitchell also set up a special Studio X where he could do his own private design work. After returning from the 1957 Turin Auto Show, Mitchell gave his Studio X team photos of cars that most impressed him; the streamliner record cars from Abarth and Stanguellini, and the Alfa Romeo “Disco Volante” coupe. He liked the bulging fenders and sharp horizontal crease line, and instructed his team to sketch some ideas based on the photos.

A few days later, Mitchell came back to review his team’s progress. He carefully looked at all the drawings and stopped at one and said, “Whose work is this?” Brock raised his hand and Mitchell said, “Nice! I’d like everyone to take a closer look here because this approach to the theme has some real possibilities. Your goal is to expand on this. Let’s see how we can approve.” Studio head Bob Veryzer might have been peeved because he put Brock’s drawing away! But during the next review, Mitchell asked, “Where’s that sketch I approved?” Veryzer put the Brock sketch back up and Mitchell said, “Yes, that’s the one! This is what I want!” That’s how Brock got in the lead design team.

Brock refined his design and explored removable roof panels, unique door hinges, and a roll bar built into the B-pillar. Several weeks into the project, Mitchell asked Brock if he knew anything about Earl and Duntov’s 1957 SS Racer. Brock explained that he and several of his designer friends drove around the clock to Sebring to see the car race. Mitchell was impressed and then explained that he had acquired the SS mule chassis and intended to use it as a successor to Earl’s car, and work on it as an “advanced concept”. Thus the XP-87 was born.

Based on Brock’s refined sketches, a work-order was released for a 1/5th scale model to be built. Because of UAW regulations, all of the clay work would have to be done only by the modelers and Brock couldn’t even touch the model. What Brock learned was that the modelers were outstanding, fast professionals, and totally open to his sugestions; they were there to serve the designers. Once again, Brock was learning from the best.

Around the same time, Ed Cole was pushing his Q-Chevrolet line concept that would have all 1960 Chevrolet cars, including the Corvette, use a transaxle for better weight distribution, and to eliminate the interior transmission hump. Duntov’s engineering layout included an all-aluminum fuel injected engine, a four-speed transaxle, four-wheel independent suspension, a platform chassis, and inboard brakes. A full-size space buck was built and Brock and the team translated the 1/5th scale mode into a full-size clay model. Brock commented that with the space buck, everything fell into place. Unfortunately, the entire Q-Chevrolet concept collapsed due to cost and was diluted down to a less expensive car more suitable for production.

Peter Brock explains the Stingray Racer.

But Mitchell still was hooked on Brock’s design. The XP-87 project morphed into Mitchell’s Stingray Racer and then into the 1963 Corvette project, both driven by the capable skills of co-designers Larry Shinoda, Chuck Pohlmann, Tony Lapine, and Gene Garfinkle. Because of the AMA Racing Ban, Brock saw no opportunity to be involved with anything connected to racing, so he left GM on good terms, and went back to California to begin his racing career.

Post GM Brock raced an ex-Le Mans team Cooper and later upgraded to a Lotus II Series 2, coming in runner-up two seasons in a row to veteran racer Frank Monise. Through providence, Brock was Carroll Shelby’s first employee and set up the Carroll Shelby School of High Performance Driving, ran Shelby’s Goodyear Racing Tire operation, helped develop the very first Shelby Cobra. Brock also created the Cobra Daytona Coupe to take on the Ferrari, won an FIA GT World Championship, and World Speed Records at Bonneville.

In 1965 Brock started Brock Racing Enterprises and raced Hinos, Datsuns, and even a NASCAR Mercury until 1972. After Brock decided to end his racing career, he got into hang gliding. In recent years Brock has worked as an automotive photo journalist and authored a book about the Daytona Cobra Coupes, and “Corvette Sting Ray: Genesis of an American Icon. In 2017 Brock was initiated into the National Corvette Museum’s Hall of Fame in 2017. Brock Brock’s single sketch was the beginning of the Sting Ray. – Scott

Here are the links to the previous five parts of the “Corvette’s Founding Fathers” series…

Pt 1 – Harley Earl

Pt 2 – Ed Cole

Pt 3 – Bill Mitchell

Pt 4 – Zora Arkus-Duntov

Pt 5 – Larry Shinoda

 

Founding Fathers Pt 3 of 6: Bill Mitchell, Creator of the Corvette Look

Published on by Scott

When Harley Earl’s XP-122 “Corvette” debuted at the 1953 GM Motorama, the clean design was way ahead of cars of the day. The look reflected Earl’s style; long hood, low, and rounded – a simple yet beautiful design. Earl was five years away from retirement and had already handpicked his replacement, William L. Mitchell. Bill learned the corporate ropes from Earl, and while a faithful lieutenant, had his own unique style that completely changed the look of the Corvette.

This is Mitchell and the 1959 Stingray Racer. Note the red paint and clear hood scoop. This is what the car looked like when it was in the Elvis Presley movie, “Clambake”. See the photos of The King and the 1959 Stingray Racer at the bottom of this post.

One of Mitchell’s famous quotes is, “I got gasoline in my veins!” Mitchell’s father owned a Buick dealership, so Bill grew up surrounded by cars. Born on July 2, 1912 in Greenville, Pennsylvania, as a kid Bill was always drawing cars. His father sent him to Carnegie Tech to learn to draw something besides cars, but it didn’t work. After college Bill got a job at Collier Advertising as an office boy, went to night school for art, and quickly worked his way into the art department. Still “drawing cars”, Bill befriended Sam, Miles, and Barron Jr. Collier with the common interest in, you guessed it, cars.

On the weekends Bill would hang out with the Colliers at their Tarrytown, New York estate, between the Rockefeller and Stillman estates. The guys had a blast roaring around the grounds in MG sports cars. The Collier brothers were so into racing, they started the Sports Car Club of America, and their pal Bill was their official illustrator. Walter Carey, an industrialist and friend of Harley Earl, saw some of Bill’s illustrations and asked him if he ever considered designing cars. Bill answered, “No.” Carey suggests Bill send him some illustrations to forward to Earl. This was the summer of 1935 and by December, Harley Earl hired Bill Mitchell to work as a designer at General Motors. Bill would work for GM until he was 65 years old.

Bill was a natural and a quick learner. A year later, he was in charge of the Cadillac studio! Through the 1930s to the mid-1950s Mitchell created the 1938 Cadillac Sixty Special, the 1949 Cadillac Coupe DeVille, the 1955-1957 Bel Airs, and many other now-classic cars. Mitchell got along very well with Earl and was never on the receiving end of an Earl’s volcanic dress-downs; Bill knew how to “go-along to get-along.” Mitchell liked Earl’s Corvette and since he knew that Earl’s design kingdom would soon be his, had his own vision for a future Corvette.

On May 1, 1954 Mitchell was promoted to GM Director of Design, but still under Harley Earl. To save the struggling Corvette, Earl was directing the next Corvette based on his Olds “Golden Rocket” Motorama show car. The new designs were classic Earl: very rounded, with a bulbous top, a split rear window, and fins. But GM decided to drop Earl’s new concept to reevaluate the Corvette.

Here’s Bill Mitchell with his two favorite fish – the 1959 Stingray Racer and the 1961 Mako Shark-I. Snappy coat, Bill!

Meanwhile, Mitchell’s group was working on what would later be called the “Q-Corvette”. Upon his arrival back from the 1957 Turin Auto Show, Mitchell gave design studio manager, Bob Veryzer’s team photos from the show, with instructions that he liked the bulging fenders and sharp beltline of the Abarth 750 and the Abarth Alfa 1000 streamliner. Mitchell was looking for something new and different. He told the group of designers, “I want this form to be a complete breakaway from what we’ve seen around here in the past.”

Peter Brock was part of the team and was the youngest designer ever hired by GM. Brock described Mitchell as, “… garrulous, rather extroverted and often profane when he wanted to emphasize a point. Mitchell made sure everyone knew he was the boss, but still loved being “one of the guys.” Mitchell closed out his informal meeting saying, “I’ll be back in a few days kids; show me what you’ve got.” The young designers created dozens of sketches with Mitchell keying in on a Peter Brock sketch. The design process went around and around, yet each time Mitchell came back to Brock’s drawing, which eventually became XP-87, the Q-Corvette, which eventually became Mitchell’s 1959 Stingray Racer, but as a roadster.

Mitchell’s Stingray Racer was another chapter in his feisty career. After his promotion to VP of Design and despite GM’s racing ban, he indulged himself by “buying” the mule chassis of the 1957 Corvette SS, and had his guys adapt the Q-Corvette body to the chassis so that he could go racing. In a large meeting, GM president John F. Gordon said, “I thought everyone knew we were out of racing.” Later Mitchell asked Gordon, “Were you talking about me?” Gordon replied, “Damn right I was!” Mitchell asked. “Do I have to quit?” Gordon snorted, “You’ve got to quite right now!” Bill wrote Gordon a letter explaining that he got his job from racing, because that’s what he did – like a doctor going to conventions. Later Mitchell asked Gordon if he’d read the letter and Gordon replied, “I sure as hell did. You’re a good salesman. You can go ahead. Keep it off the property and spend your own money.” Yes, Bill dodged a bullet! Mitchell raced the car for two years and won a championship with no external marking besides, “Stingray”. The fan response was so intense; the next Corvette had be the Stingray.

1963 was a banner year for Bill Mitchell’s cars, as the Sting Ray and his “personal luxury car” the Buick Riviera both arrived. Like the Sting Ray, Mitchell didn’t lay down a single line himself, he knew what he wanted and gave direction until he saw what he was thinking. His instructions for the Riviera were that he wanted to combine a Rolls Royce with a Ferrari. That interesting mix turned into another Mitchell classic.

As soon as the 1963 Sting Ray released, Mitchell got started on the next new Corvette. When he brought in his team of advanced designers, lead by Larry Shinoda, he told them he wanted, “…a “narrow, slim, selfish” center section and coupe body, a prominently tapered tail, an “all of one piece” blending of the upper and lower portions of the body, and prominent wheels with protective fenders that were separate from the main body yet grafted organically to it.” While that sounds obtuse, it does describe the Mako Shark-II. When the Mako Shark-II was shown to management in April 1965, it was unanimous, the next Vette had to be the shark. Outrageously, they wanted it as a 1967 model.

Bill Mitchell’s personality was as intense as his designs. Mitchell didn’t hold division general managers in high esteem, and he hated engineers trying to be designers. He once told a general manager, “I don’t tell you how to make your car or run your plant. Keep your damn nose out of design.” Bill didn’t like smaller cars and once said, “It’s hard to tailor a dwarf.” Mitchell detested focus groups and committees and said, “You can’t design by committee. You have to say, “This is what I want to do.” On the same topic, he said, “Frank Lloyd Wright did not go around ringing doorbells asking people what kind of houses they wanted.”

Many that worked with Mitchell admired him greatly. Designer Roy Lonberger described bill as, “The most authentic man I ever met. His focus never changed, his design vision was laser clear. He changed designs with complete responsibility to design a car. He delegated responsibility, but never abdicated his own. You always knew where you stood with Mitchell because he told you.” Larry Shinoda got along wonderfully with Bill, but Duntov, now so well. They had a famous blowout when Zora came into Bill’s studio complaining about the Sting Ray’s split window. Incensed that a lowly engineer would demand he change his design, a shouting match ensued. Mitchell called Duntov “Zorro” and Duntov called Mitchell a “red-faced baboon”! Duntov was persona-non-grata in Mitchell’s studio for a long time. Designer Robert Cumberford said, “I liked him because he was enthusiastic about things, but he could be crude and vulgar.” Chuck Jordan, eventual VP of Design said, “He certainly loved women. Bill once told me, “If God made anything better than a woman, he kept it for himself.”

When Mitchell retired in December 1977, GM’s upper management decided that never again would they allow a VP of Design with so much power. Mitchell’s successor, Irv Rybicki was totally unlike Bill – some called him a “Yes Man” claiming that’s why 1980s GM’s cars were so boring. A few years before his death in 1988, Mitchell has this to say about the C4 Corvette, “That square box is pretty near plastic… the instrument panel – Dracula’s dressing room… it rides like a truck… it isn’t a style car, it’s an machine car… engineers are running it. Earl would never let that – I would never let that happen, and I condemn the guys for it!” He also said, “My time is over.” Fast forward to the Tom Peters C6 and C6 design era and I believe Bill Mitchell would approve. – Scott

Corvette’s Founding Fathers, Pt. 1 – Harley Earl, CLICK HERE.

Corvette’s Founding Fathers, Pt. 2 – Ed Cole, CLICK HERE.

Here’s Elvis Presley and the 1959 Stingray Racer from the 1967 movie “Clambake”.

The History of Mid-Engine Corvettes, 1960 to C8: Part 2

Published on by Scott

The 1962 Monza GT – Corvair-based, Mid-Engine Sports Car – Think Porsche 550/1500 RS Spyder and you’re close!

By the early 1960s the Fuelie Corvette, equipped with Duntov’s “Racer Kit” suspension and brake packages, established itself as a solid, dependable platform for a B/Production or A/Production SCCA racer. Several cars had killer reputations on the track, including; the Nickey Chevrolet-sponsored 1959 “Purple People Eater” driven by Jim Jeffords, Dave MacDonald’s “Don Steves Chevrolet” C1 Corvettes, C1s raced by Dick Thompson and Dick Guldstrand, as well as Grady Davis’ 1961 B/Production and 1962 A/Production “Gulf Oil” Corvettes, and others. Setup right, these cars could be unbeatable.
Yet, despite their track success, the European sports car community did not accept the early Corvettes. Why? Because Corvettes were big and heavy, compared to European sports cars. Traditionalists considered Corvettes to be crude, with more in common with a Chevy Bel Air than anything from Porsche, Ferrari, Maserati, Jaguar, Aston Martin and other low-volume European exotics. Corvettes were “mass produced” while European sports cars were “hand-crafted.” This perception did not go unnoticed inside Chevrolet, and some were thinking of a “Plan B” for the Corvette.

The Monza GT and the Monza SS roadster were never intended to be replacements for the Corvette. After all, the basic platform was the rear-engine Corvair. Now before you go, “Puke! Puke!” lets go back to 1957 for a brief look at where the Corvair came from, Chevrolet General Manager, Ed Cole’s aggressive and innovative, “Q-Chevrolet” line of cars. Continue reading “

The History of Mid-Engine Corvettes, 1960 to C8: Part 2″ →

Corvette Timeline Tales: August 22, 1957 – GM designer, Peter Brock submits sketches for a new Corvette design – VIDEO

Published on by Scott

GM designer, Peter Brock submits sketches for a new Corvette design and Chief of Styling, Bill Mitchell, approves and orders Styling to proceed with Brock’s design.
Brock-Sketch

Peter Brock was one of the youngest designers ever hired by GM Styling. Ed Cole was the new general manager at Chevrolet and after the success of his small-block Chevy engine design, he wanted to make a follow-up splash by introducing the entire 1960 Chevrolet line of cars equipped with a transaxle, including an all-new Corvette. A transaxle would improve weight distribution and yield more front seat interior space. Continue reading “

Corvette Timeline Tales: August 22, 1957 – GM designer, Peter Brock submits sketches for a new Corvette design – VIDEO” →

Corvette Odd-Ball: Was the 1938 Adler Trumpf Rennlimousine the Genesis of the Iconic Sting Ray’s Roof?

Published on by Scott

Was Corvette Designer Larry Shinoda Inspired by an Old German Pre-WW II Racecar?

1-Side-by-Side-Rear

Dateline: 7.22.15 The lineage runs like this. In 1957 Chevrolet’s new general manager, Ed Cole (the engineer credited with the design of the small-block Chevy engine – the greatest, longest-in-production engine in Detroit history) decided that by 1960 ALL General Motors cars would use a transaxle to improve weight distribution, handling, and to open up interiors for more space. It was call the “Q-Chevrolets” and yes, there was to even be a Q-Corvette. Continue reading “

Corvette Odd-Ball: Was the 1938 Adler Trumpf Rennlimousine the Genesis of the Iconic Sting Ray’s Roof?” →

Corvettes at Carlisle – First ZL1 Engine Alive and Well!

Published on by Scott

 

Dateline: 8.29.12

Thanks to Kevin Mackay and his team at Corvette Repair, once piece of lost Corvette history has been found, refurbished, and ready for the show circuit.

Be sure to catch the below slide show!

Yes, the original fan was green.

The entire Q-Chevrolet project quickly fizzled due to cost concerns but several great ideas came out of the project. The unique Peter Brock and Bob Veryzer-designed body eventually was developed into the 1963 Sting Ray. The all-aluminum engine proposal started the ball rolling with aluminum parts gradually seeded into various Corvette engines. While aluminum water pumps, intake manifolds, and bell housings were relatively easy to develop, heads and the block were another story. By the early ‘60s, Duntov began experimenting with aluminum heads, but they proved to be unreliable. The small-block Chevy engine was already a lightweight, but the thought of an even lighter version of the engine was indeed tantalizing.

Corvettes have been powered by all-aluminum engines since the arrival of the LS1 in the all-new C5 1997 Corvette. Of course, today nearly all engines are  made with the lightweight metal. These days, the move is on to integrate even lighter magnesium, carbon fiber, and plastic parts wherever possible. But back in 1957, only the exotic cows of the most expensive European sports cars had all-aluminum engines.So in 1957 when new general manager Ed Cole proposed his Q-Chevrolet line of trans-axle cars, including the Corvette, Zora Arkus-Duntov jumped on the chance. No one inside GM was more tuned into the advantage of an all-aluminum engine than Duntov. The proposal Duntov outlined for his vision of the Q-Corvette included the mandatory trans-axle and an all-aluminum, fuel-injected small-block Chevy engine. The Rochester Fuelie had just arrived and the small-block Chevy engine was only in its third year of production. No one in Detroit was making all-aluminum engines, so this was a very outrageous proposal. Continue reading “Corvettes at Carlisle – First ZL1 Engine Alive and Well!” →

1963 Corvette – The First Production Sting Ray

Published on by Scott

Dateline: 5.16.12

The Illustrated Corvette Series “First” continues with a look back at the FIRST production Sting Ray.

A few years ago, someone created a series of Chevrolet billboards using classic, iconic images of some of the most popular Chevrolet cars. Naturally, there were several layouts featuring Corvettes. While this is a totally biased opinion, I think the above “The Original American Idol” is the best. Four words sum it up perfectly and the back end of the one and only, split-window coupe says a thousand words.

Our friend and VETTE Magazine founding editor, Marty Schorr, recently posted a review of the new 911 Porsche Carrera S at his CarGuyChronicles.com blog site. Writer, Howard Walker expounds on the fact that while the latest version of the classic 911 shares no hardware what-so-ever with the original and first ‘63 911, the spirit of the original 911 is still in tact. It’s an amazing combination of the rear-engine layout and the fact that the car still “looks” like a 911, only bigger and much better. I have often wondered what today’s Corvette would look like had Bill Mitchell never designed the game changing Mako Shark II. As I have written here in stories about Mitchell’s Mako Corvettes, the Mako Shark II was so astonishing, it simply HAD TO BE the next Corvette. End of conversation! And, we’ve moved on from there.

So, buckle up and lets take a blast back to 1963 for a look-see at the first production Sting Ray! – Scott

I call the Corvette the “The American Automotive Horatio Alger Story.” It’s the ultimate automotive rags-to-riches story. You could also call it an automotive Cinderella story. While the C6 has taken more flack than it deserves, it’s good to look back to the very beginning to get a really clear picture of how far the Corvette has come in 60 years. Today, new designs are market researched, but in the ‘50s, it was a seat-of-the-pants approach, driven by men with strong personalities. “Father” of the Corvette, Harley Earl, was the director of GM’s “Art and Color Section.” from 1927 to 1958.  His successor, William L. Mitchell picked up the mantle and drove the Corvette where Earl never imagined.

The Sting Ray design began in ‘57 as the Q-Corvette concept and morphed into Mitchell’s weekend warrior Stingray Racer. Mitchell wanted to go racing, and do some informal market research. By ‘59, the Corvette was due for a change and Mitchell had the design already worked out. Late in ‘59, Mitchell assigned stylist Larry Shinoda to make a full-size, clay coupe version the Stingray Racer. By April ‘60 Continue reading “1963 Corvette – The First Production Sting Ray” →

Vette Video: 1960 Mako Shark-I Corvette At The Georgia Aquarium

Published on by Scott3 Comments

Dateline: 3.5.12

What A Better Place To Show Off the Mako Shark-I

Lucky for us, GM design chief, Bill Mitchell had a fish fetish. Or should we say, a shark obsession. I once read an amusing story about Mitchell and his “shark thing.” He was talking with someone about the Mako Shark-I show car and he said, (sorry for the paraphrasing) “Look at the open mouth in that grille area. You can just see the blood dripping from the opening!” Yea, he was “into it.”

The story goes that Mitchell caught a big shark off the coast of Bimini and had it stuffed and mounted. It must have been his muse because he obviously picked up on three design elements.

1. The real shark’s side gills. On the car they show up just ahead of the front wheel wells and just behind the rear wheel wells.
2.  The real shark’s open mouth snout. Gee Bill, no teeth for the car? I think over the years, a few show car Corvettes have been seen with shark’s teeth.
3. The real shark’s light underbelly and dark blue top. This became the signature “Mako Shark” paint job with lots of variations.

Continue reading “Vette Video: 1960 Mako Shark-I Corvette At The Georgia Aquarium” →

Vette Shows: The Sights of C2 Corvettes at the 2011 30th Corvettes at Carlisle Show

Published on by Scott

Dateline: 9.3.11
2011 Corvettes at Carlisle Week continues with coverage of 1963 to 1967 C3 Corvette Sting Rays – The Original American Idol!

Yesterday we showed you some of the C3 Shark Corvettes from the 2011 Corvettes at Carlisle Show. We attended on friday and it was a good thing because I read on keith Cornett’s CorvetteBlogger.com that overcast skies on Saturday have vendors packing by noon time. Hurricanes seldom blow up the east coast the way that Irene did, what’a shame it had to be that weekend.

While the 1965 Mako Shark II show car was a total game-changer for Corvette styling, back then no one was saying, “Gee, don’t you think the Sting Ray is looking a little tired?” NEVER HAPPENED. I’ve often wondered what the Corvette would look like today had the shark styling had not happened and the Sting Ray design was allowed to develop and mature, the same way the 911 Porsche did over the years. Today’s 911 Porsche still has the basic look from when the car first arrived as a 1965 model.

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While Chevrolet stylist Larry Shinoda is generally credited for designing the Sting Ray, Larry’s work began where the Q-Corvette ended. In 1957 Ed Cole, the lead designer on the small-block Chevy engine was no the general manager of Chevrolet and wanted to leave his mark on future Chevrolets by reengineering the entire line up of Chevy cars with transaxles so that the interiors could all be opened up with the elimination of the big transmission hump. The larger project was called the “Q-Chevrolets” and the “Q-Corvette” was just one can in the line. The Q-Chevrolets were supposed to be introduced by 1960, but after the numbers were crunched, the entire project was canceled.

Here's what designers inside the Corvette design studio were thinking back in 1957. The basic shape was spot on!

Bill Mitchell took the opportunity to make the Corvette his own. He liked the look of the Pininfarina and Boano body designs on the Italian Abarth cars. The strong horizontal crease and fender humps were borrowed from the Italian cars. The structure of the Q-Corvette had a hoop/roll bar behind the driver’s seat. This allowed the car to have lift-out roof panels and the absence of an a-pillar for the windshield. Stylists Bob Veryzer and Pete Brock worked under Mitchell’s direction, with the help of Continue reading “Vette Shows: The Sights of C2 Corvettes at the 2011 30th Corvettes at Carlisle Show” →

427 ZL-1 John Greenwood & A NHRA Top Fuel Record Holder Chevy Top Fueler!

Published on by Scott


John Greenwood’s 427 ZL-1 BF Goodrich Corvette Race Car

Special thanks to www.RollingThunderz.co

Aluminum engines are so common today that no one even notices. But back in the ‘50s and ‘60s, aluminum engine components were considered trick hardware. All-aluminum high-performance engines were only found in exotic European cars. Having learned his engineering and racing craft in Europe, Zora Arkus Duntov first proposed an all-aluminum engine as part of the 1957 Q-Corvette proposal. Also included in the proposal was an aluminum transaxle. This was actually part of a larger plan called the Q-Chevrolets for 1960. Chevrolet chief engineer, Ed Cole, envisioned the entire line of Chevrolet cars equipped with the transmission mated to the rear axle as a way of vastly improving the interior space of every Chevy.

The plan was eventually scrapped for cost reasons, but Duntov was definitely keyed in on the idea of adding aluminum engine and drive train components into his Corvettes as a way to lighten the car. Through the ‘60s, aluminum parts slowly crept into the Corvette. But it wasn’t until the introduction of the ‘67 L-88 that the automotive press and fans really took notice of the lightweight hardware.

 


One of Duntov’s favorite playgrounds – the GM test track!

But when Zora and his team unleashed the all-aluminum ZL-1, jaws dropped and eyes popped! The thought of a solid-lifter, 12.5:1 compression, big carb 427 that weighed as much as a small-block was just OUT’A SIGHT! FAR-OUT! GROOVY, MAN!

Hot Rod Magazine splashed the all-aluminum ZL-1 on the cover and caught a lot of heat for spinning the fan on an engine that was obviously not running or attached to anything. The yellow headers or ANY headers for that matter were NOT part of the ZL-1 package. Unfortunately for fans of lightweight Corvettes, the ZL-1 was for all intent and purposes a teaser option. Yes, the ZL-1 was an official option costing $4,718, PLUS $1,032 for the L-88, on top of the $4,781 base price of the ‘69 Vette. Only three ZL-1’s were “officially” built and all are accounted for. However, there may have been 10 or so ZL-1 Corvettes built as demo cars. CARS Magazine editor, Marty Schorr was one of the fortunate few that got to drive a ZL-1 ‘69 Corvette and it was NOT one of the three surviving ZL-1 Corvettes.

 

Special thanks to http://www.rmauctions.com/

Fortunately, for racers, such as John Greenwood, ZL-1 engines could be purchased as crate engines. While Greenwood wasn’t the only Corvette racer to use a ZL-1, his stars and stripes, BF Goodrich-sponsored Corvette became a legend. One ZL-1 engine even made its way into Jim Butcher’s Top Fuel dragster and actually held the NHRA elapsed-time national record for a few week in 1973. The all-aluminum ZL-1 gave Butcher a 500-pound advantage over the cast iron Hemi dragsters of the day!

It’s too bad that it would take 28-years before a production Corvette would finally be powered by an all-aluminum engine. The LS1 engine powered the ‘01 C5-R Corvette to Corvette’s first big class win at le Mans. Today’s all-aluminum, 638-horsepower LS9 engine is the most powerful production car engine ever produced in Detroit’s history and is ONLY available in a Corvette!

Scott

Would a Fuelie ZL-1 work for ya? YIKES!!!

NHRA Gatornationals – Hemi fans COULD NOT BELIEVE that Jim Bucher’s little Chevy Top Fueler set the NHRA Top Fuel ET National Record with a 6.09 ET! Too bad the car didn’t dip into the 5’s!

I covered the 1969 ZL-1 Corvette in VETTE Magazine in July ’09 in ICS No. 149