Corvette Chiefs, Pt. 2 of 5 – Dave McLellan

Dave McLellan, Heir to Duntov’s Engineering Throne

(Dateline: 7-3-20 – This story was originally published in the now-defunct Vette magazine, July 2019 issue. Story, Illustrations & Graphics by K. Scott Teeters) – When Dave McLellan took over as Corvette’s new chief engineer on January 1, 1975, it was a whole new world. The prevailing trends went from performance cars to safer cars with reduced emissions. Not even Duntov could have made a difference in the ‘70s. But as performance went down, Corvette sales went way up! The sales department was happy, but the Corvette was really getting old. Dave McLellan was an unknown to the Corvette community and many wondered what he would bring to the brand. It turned out; he brought a lot!

McLellan was a car guy. He rebuilt his family’s Frazer and entered the Fisher Body Craftsmen’s Guild Model Contest. Upon graduation from Wayne State University in Detroit with a degree in mechanical engineering, GM hired Hill on July 1, 1959. Thought the ‘60s Hill worked at the Milford Proving Ground on noise and acoustics issues with GM tank treads, Buick brakes, and tuned resonators for mufflers. Hill was also going to night school to get his Master’s Degree in engineering mechanics. In 1967 Hill was part of the group that planned and operated the 67-acre Black Lake where ride, handling, and crashworthiness tests are performed.

Chevrolet engineering brought in Hill to work on the 1970-1/2 Camaro and Z28. Hill wanted to move into management so he took a yearlong sabbatical and attended MIT Alfred. P. Sloan School of Management. The school emphasizes innovation in practice and research. In July 1974 Hill was Zora Arkus-Duntov’s part-time assistant, training for taking over the position in 1975.

While Hill didn’t have Duntov’s racing experience, he owned several Porsches and understood racing sports cars. As Duntov was leaving, he told Hill, “Dave, you must do mid-engine Corvette.” Little did they know that it would finally happen forty-five years later.

When Duntov took control of Corvette engineering in 1956, he had to boost sales and make the Corvette a performance car and a capable racecar. When Hill took control, Corvettes were never selling better, but the platform design was nearly fifteen-years-old. Hill had to keep the car fresh, hit the new requirements, and maintain performance; all with a limited budget.

Management figured that the Corvette had a captive audience, so they didn’t have to spend money to change anything. Fortunately, that lame notion was overruled. The 1978 glass fastback and the 1980 front and rear bumper covers were excellent updates. Another major issue was quality control. The St. Louis assembly plant made three other cars and often workers were unfamiliar with the specialties of the Corvette. This issue didn’t get fixed until the plant was moved to the Corvette-only Bowling Green facility.

McLellan knew that the C3 needed to be replaced, as the chassis was designed around 1960! For a brief period, it looked like the mid-engine Aerovette would become the C4, but Chevrolet decided to abandon all mid-engine programs. The all-new C4 began to take shape in Jerry Palmer’s Chevrolet Studio Three in 1978. When the C4 debuted in December 1982, it received rave reviews, despite the fact that suspension engineers later admitted that they over-did-it with the stiff suspension. By 1985 the suspension was softened and the 150-mph Corvette won Car and Driver’s “Fastest Car in America” award and began the total domination of Corvettes in the SCCA Escort Showroom Stock racing series from 1985-to-1987. Porsche bought a Corvette to take apart to find why the car was unbeatable. By the end of 1987, SCCA kicked out all of the Corvettes for being too fast! McLellan followed up with the Corvette Challenge factory-build racecars.

McLellan’s personal style was more suited to the intricacies of modern electronic computer-controlled performance cars than Duntov’s. Where Duntov’s enthusiasm was effervescent, McLellan was laid-back, approachable, but not shy with the automotive press. After the successful rollout of the C4, McLellan took on four very serious performance projects for the Corvette; The Callaway Twin Turbo option, the ZR-1 performance model, the LT-5 Lotus/Mercury Marine performance engine, and the mid-engine CERV-III. Let’s look at all four projects.

“Supercars” were the rage and by 1985 Porsche had their 959 and Ferrari was about to unleash their F40. To have something to offer while McLellan was starting his ZR-1 project, a deal was made with Reeves Callaway to build brand-new Corvettes with a Callaway Twin Turbo package. The cars had 345-horsepower (stock Corvettes had 240) and from 1987-to-1991 RPO B2K was the only non-installed official RPO Corvette option ever offered.

The ZR-1 super-Vette had two components. The first was its Lotus-engineered, all-aluminum, double-overhead-cam engine built by Mercury Marine. McLellan’s engineers set down the size parameters and horsepower objective; Lotus did the rest. McLellan turned to the best manufacturer of all-aluminum, performance marine engines in the country, Mercury marine. The end result was the beautiful jewel-like LT-5, an engine that is still respected today. The second component was the widening of the ZR-1’s body to cover the enormous P315/35ZR17 rear tires and beef up the car’s drivetrain and suspension.

The 1990 CERV-III Corvette was McLellan’s vision of Duntov’s mid-engine Corvette, with electronic steroids. The car had a carbon fiber Lotus-style backbone chassis, four-wheel steering, active suspension, a transverse, 650-horsepower twin-turbocharged LT-5 ZR-1 engine and a dry-sump oil system, and a four-speed transaxle. This was the final design that started out as the Indy Corvette in 1986 and had a top speed of 225-mph. And lastly, the CERV-III was designed to be manufactured.

Photo: GM Archives

When McLellan was part of the 1992 “Decision Makers” three-man internal Chevrolet design group, gathered to evaluate the direction of the C5, McLellan chose the CERV-III concept over the front-engine “Momentum Architecture” and the stiffer/lighter restyled C4. But the CERV-III was deemed too expensive for the market. The “Momentum Architecture” with its backbone structure, a transaxle, and an all-aluminum engine with design elements from the LT-5, lives on today in the C7.

McLellan oversaw the three-year, 1990-to-1992 mid-cycle refresh. The process started in 1990 with an all-new dash; 1991 saw new front and rear bumper covers; and in 1992 the 245-horsepower L98 was replaced with the 300-horsepower LT1.

In 1990 McLellan won the Society of Automotive Engineers’ Edward N. Cole Award for Automotive Engineering Innovation. In 1991 GM was offering early retirement packages, allowing 53-year old employees to receive the same benefits as those retiring at 62. McLellan took the offer and stayed on as a consultant while GM looked for a suitable replacement. McLellan was fortunate enough to be in his consulting position on July 2, 1992, when he was on hand to see the one-millionth Corvette roll off the Bowling Green assembly line. What a thrill for a car that McLellan had given so much to and a car that was so often on the line for its survival.

Finally, on November 18, 1992, the new chief of Corvette engineering was Dave Hill. Since then, McLellan has been a much sought after automotive consultant, he wrote and illustrated “Corvette From the Inside” and he’s a frequent and revered guest of honor at all of the top Corvette events. In 1999 McLellan was inducted into the National Corvette Museum’s Hall of Fame. McLellan goes down in the Corvette history books as the second of the five great Corvette chief engineers. – Scott

PS – Be sure to catch all 5 parts of my Corvette Chiefs Series

Corvette Chiefs, Pt. 1 – Zora Arkus-Duntov

Corvette Chiefs, Pt.2 – Dave McLellan

Corvette Chiefs, Pt. 3 – Dave Hill

Corvette Chiefs, Pt. 4 – Tom Wallace

Corvette Chiefs, Pt. 5 – Tadge Juechter

 


 

 

 

 


HOT Corvette Auction Action Starting TODAY!

Several very interesting and unique Corvettes will be ON THE BLOCK at the Mecum Kissimmee and Barrett-Jackson Scottsdale Auctions over the next few weeks.

Dateline: 1.5.18, Images: Vette Vues, GM Archives, Mecum Auctions and Barrett-Jackson Auctions – “Auctions”, be they car or even farm auctions, are a lot of fun because it is the best example of “The Marketplace”. Things sell based on what people are willing to pay and not what sellers think something is worth. If a vehicle has a Reserve that isn’t met, that means that the Seller’s notion of the car’s value isn’t in alignment with the Market. If a vehicle has No Reserve, the Market will determine the vehicle’s value.

Bidding Wars and Feeding Frenzies can wildly drive prices up, making an auction a lot of fun to watch. On the other hand, excellent vehicles are often “Well Bought” at very good prices for a variety of reasons; rough condition, poor presentation, high production numbers, and cars that are just plane weird!

Two major car auctions are upon us with some very interesting and unique Corvettes that may or may not find new owners. The Mecum Kissimmee Auction starts today, January 5, 2018 and runs to January 14, 2018. The Barrett-Jackson Scottsdale Auction starts January 13, 2018 and runs to January 21, 2018

Of interest to Corvette and Chevy fans are the following cars;

January 12, 2018 – Mecum Kissimmee, 1969 Baldwin-Motion Phase-III GT Corvette. Lot F139


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HOT Corvette Auction Action Starting TODAY!”


FINALLY! A Factory-Built ZR1 Convertible!!!

The rumors were true! The new C7 ZR1 will be available as a coupe AND a convertible. TOP DOWN, OH, WOW!!!

Dateline: 12.24.17 – Images: GM Archives – Let’s briefly back up to 1990 in order to put the significance of the new C7 ZR1 convertible into perspective. When the first ZR-1 was released in 1990 there was no way that it could have been offered as a convertible. In order to even make the C4 a convertible, a large X-brace had to be added to the bottom of the C4’s chassis.

The C4 ZR1 had a nice run from 1990 to 1995. But when the C5 Z06 arrived, offering ZR-1-level performance at a fraction of the cost, the C4 ZR1’s star began to fade. What made the C5 Z06 such a track star was it’s strong structure. It was as it Corvette engineers discovered structural rigidity. Thanks to lessons learned in the C5-R Corvette Racing Team experience, the C6 Z06 took the concept of structural rigidity to a new level, and with an aluminum frame to boot!

Corvette performance fans were so jazzed over the C6 Z06 that no one was pinning for something more. So, when Chevrolet released the C6 ZR1, dripping with carbon fiber and the supercharged 638-horsepower LS9 engine, heads were spinning and Duntov sat up in his grave and said, “Vhat?!?!?” (There was no convertible version, but no one was asking for one.) The C6 ZR1 was everything that Corvette engineers could possibly do with the C6 platform.

When that happens, there’s only one thing left to do – start working on the next generation Corvette! Continue reading


FINALLY! A Factory-Built ZR1 Convertible!!!”


Own a Piece of Corvette History! 1988 ZR-1 Corvette Prototype Up For Auction!

Rare Corvette Engineering Prototype Goes ON THE BLOCK at Mecum Kissimmee 2018 Auction, January 5 – 14 – Lot 165

Car auctions are a lot of fun because you never know how much or how little any given car is going to sell for. The exception being rare Ferraris, Cobras, and anything owned by Steve McQueen – they always sell for A LOT! Corvettes are especially unpredictable. Several years ago the John Greenwood Sebring ’74 IMSA Corvette (the Batmobile) was a NO SALE. In 2016 the very first C7 2017 Grand Sport Corvette to roll off the assemble line sold for only $170,000. Many, including me, thought that the car would go for a lot more, as previous “first off the assembly line” Corvettes have sold for big bucks. A lot of it has to do with the mood of the economy. So, we never know and predictions are often way off.

Next month at the Mecum Kissimmee Auction, January 5 – 14, a truly rare ZR-1 Corvette will hit the auction block. The Lot Number is, S165. When the ZR-1 finally came out as a 1990 Corvette is was a very big deal. This was truly an exotic Corvette with its Lotus DOHC all-aluminum engine and wide body. Tommy Morrison’s race-prepared, but stock, ZR-1 shattered speed endurance records, thus legitimately giving the ZR-1 the nickname, “King of the Hill.”

To see the BIG version of the ZR-1 prototype’s Build Sheet, CLICK THE ABOVE IMAGE.

Engineering prototypes and mule Corvettes are typically stripped of their good parts and then sent to the crusher; a terrible fate. But sometimes, a few are saved. According to Mecum, the ZR-1 that will be auctioned off next month is one-of-two “known” C4 ZR-1 prototypes; 25 prototypes were build in July 1987. Continue reading


Own a Piece of Corvette History! 1988 ZR-1 Corvette Prototype Up For Auction!”


NEW!!! Corvette Report’s “Vette of the Month” Contest

We are happy to announce the launch of Corvette Report’s “Vette of the Month” Photo Contest.
Here’s the deal.

Dateline: 11.25.17 – Send us your best photo of your Corvette and we will post it on our “Vette of the Month” photos page.

At the end of the month we will pick a winner, and announce it as a post here at Corvette Report.

The winner will get;

An “America’s Old Glory Sports Car” print of their year Corvette, signed and numbered by K. Scott Teeters.

PLUS! a feature story in Vette Vues Magazine.

After the story is published in Vette Vues, we will post it on CorvetteReport.com.

To enter, use the below Entry Form. Continue reading


NEW!!! Corvette Report’s “Vette of the Month” Contest”


ANNOUNCING! America’s Old Glory Corvette Tees & Sweats

Show your Corvette passion
with a heap’n help’n of
patriotic American pride!

We have every year “Old Glory Corvette” layouts from 1953 to today,

available on tees, sweats and more!

Whatever year Corvette you own or love, we have a shirt for you.
Sizes Small to 2XL.

Prices start at just $13.95!

To start to order your America’s Old Glory Corvette shirt,
CLICK HERE.
Continue reading


ANNOUNCING! America’s Old Glory Corvette Tees & Sweats”


The Story of the ZR-1 Corvette – C4 1990-1991 ZR-1 Corvette: Part 2 of 4

1990 ZR-1 Corvette – Finally! A Dedicated “Performance” Model Corvette

Dateline: 8.11.17 – Photos: GM Archives, Michael Beal, Illustrations: K. Scott Teeters – There’s an unwritten, unofficial “Law of the Jungle” that basically states, “If you are at the top of the food chain, you might not be there for long.” Such was the case for the C4 ZR-1 Corvette, for a little while. The C4 ZR-1 had a six-year production run with only 7,018 units produced. The ZR-1’s head-exploding price was the biggest limiting factor. The crummy economy in the early ‘90s didn’t help, and the much-rumored, all-new C5 no doubt was a drag on the ZR-1’s sales. And then there was also that pesky Dodge Viper. The 427 Cobra’s “Marley’s Ghost” was obvious, only this time disguised as a Dodge,
 
While armchair quarterbacking is easy and hindsight is 20/20, it is worth asking the question, why wasn’t such an awesome car more successful? “Timing” aside, the ZR-1’s aesthetics was a big factor. Stated simply: When viewed by itself, the C4 ZR-1s look like “regular” Corvettes. As an illustrator and stylist, I find it astonishing that Chevrolet would have done this, after all the engineering work that went into the ZR-1.   The body panels from the doors all the way back to the rear bumper cover, are unique to the ZR-1 – made wider to cover the widest tires put under a factory-built Corvette body, to that point. This means that the panels had to be redesigned. But rather than make them visually unique, the Corvette stylists were commanded to imitate the basic design of the standard Corvette, with one exception   Continue reading


The Story of the ZR-1 Corvette – C4 1990-1991 ZR-1 Corvette: Part 2 of 4″


Morrison 1990 ZR-1 Speed Record: Aver 24-Hour 174.885-MPH! – VIDEO

Race-prepared, stock 1990 ZR-1 Shatters a 50 Year 24-Hour Speed Record

Illustration by: K. Scott Teeters

Dateline: 5.22.17 (This story first appeared in the May 2017 issue of “Vette Vues”) – Racing Corvettes used to have a long history of durability issues. There are many reasons why Corvette racecars had durability issues, but one of the biggest is easy horsepower. It’s always been relatively easy to get a lot of power out of a small-block or big-block Chevrolet engine. If a builder is more oriented towards drag racing, the temptation for an extra 50-horsepower is just too tempting for many builders. That’s fine for drag racing where a car is stressed to the max for a matter a seconds. But in endurance racing, you have to finish to win.

From the perspective of the mid-1980s, the new C4 Corvette was light years ahead of the previous two-generation Corvettes. In the mid-1980s Corvettes were so fierce in SCCA Showroom Stock racing that after two years they were kicked out for being too fast! So, the factory-built Corvette racecars duked it out in their own series, The Corvette Challenge. Breakage with the C4 cars wasn’t much of an issue thanks to the much-improved structure and suspension, plus the cars weren’t powered by massive, torque-monster big-blocks. Continue reading


Morrison 1990 ZR-1 Speed Record: Aver 24-Hour 174.885-MPH! – VIDEO”


What’a STEAL! 1991 Callaway ZR-1 Corvette Sells for $28,000!

1991 Callaway Supernatural 550 Well Bought at Barrett-Jackson Las Vegas Auction 9-25-15 – Video

1991-Callaway-ZR-1-1

Dateline: 9-25-15 – Car auctions are a ton of fun! I mean it doesn’t take long and the sing-song of the auctioneer starts to have a happy sound. But not as happy as seeing someone getting an awesome deal on a stunning Corvette.

In 1991 the ZR-1 was the “Corvette to die for!” Everything was SO exotic, it’s too bad Chevrolet played it outrageously safe with the body styling that looks almost exactly like a regular Corvette. On well, ZR-1s are still beauties and the only way it could get better was to have Callaway Engineering do their thing on top of what was already Corvette’s flagship model. Continue reading


What’a STEAL! 1991 Callaway ZR-1 Corvette Sells for $28,000!”


Corvette Timeline Tales: August 31, 1992 the 2nd Corvette Chief Engineer, Dave McLellan retires

August 31, 1992 – Dave McLellan accepts early retirement and steps down after 18 years as the Corvette’s second Chief of Engineering.

8-Dave-Mclellan
General Motors had a mandatory, “retirement at 65” policy, so as Corvette Chief Engineer Zora Arkus-Duntov was nearing retirement in January 1975 the big question was who would be chosen to fill Zora’s big shoes.
Duntov was not consulted about his replacement and McLellan would not have been his choice, but Dave was definitely the man for the job. McLellan was an Alfred P. Slone Fellow with a degree in engineering and management. The ‘70s was not a fun time and there were serious issues to be dealt with besides horsepower, racing, and mid-engine designs. There were emissions and quality control issues, as well as the implantation of a new assembly plant and an all-new Corvette to be designed and developed.

1990-ZL-1
Along with ushering in the Corvette into the digital age of computer controls and guiding the design and development of the C4, the ZR-1 was arguably one of Dave McLellan’s biggest achievements.

When the C4 Corvette came out it received rave reviews – “The Best Vette Yet!” and under McLellan’s leadership kept getting better and better every year. By the late 80s, performance was back to late 1960s levels, Continue reading


Corvette Timeline Tales: August 31, 1992 the 2nd Corvette Chief Engineer, Dave McLellan retires”


Wil Cooksey’s 2013 Interview on Scott Teeters’ Far Out Radio Program

Wil Cooksey shares his life story and career in GM and building Corvettes.

Wil-Cooksey

Dateline: 8.29.15 – Yesterday we told you about the 2015 Corvettes at Carlisle show and that Wil Cooksey is one of the special guests for the event. Actually, ever since Wil put on that stunning, explosive burnout display back in 2007, he’s become an almost permanent fixture of the Corvettes at Carlisle show.

On April 5, 2013 I had the pleasure of interviewing Wil Cooksey on my Far Out Radio program. The YouTube version of the program is below.


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Wil Cooksey’s 2013 Interview on Scott Teeters’ Far Out Radio Program”

Car Club USA: Corvette Homecoming – Video

Here’s What Corvettes Mean To People

CorvetteHomecoming-600

The other day Joe Pruitt, the Event Coordinator/Owner of the National Corvette Homecoming event contacted me to tell me about their new event video by Efran Films that covered the National Corvette Homecoming 2014 event. This is a very touching video that captures what Corvettes mean to people. As we know, they’re not just “car” they’re something else. Actually, the people in the video say it perfectly. This video has heart! Enjoy!Scott

www.corvettehomecoming.com
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www.facebook.com/bgcorvette