Tag: ZR-1 Corvette

Corvette Chiefs, Pt. 2 of 5 – Dave McLellan

Published on by Scott

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

 

 

 

 

 

Corvette Chassis History Pt. 2: C2/C3 1963-1982

Published on by Scott

The C2/C3 Corvette Chassis That Zora Built

Dateline: 7.31.19 – As seen in the January 2019 issue of Vette magazine, Illustrations by K. Scott Teeters – When the 1963 Sting Ray made its public debut in September 1962, it was a total, “WOW!” And it wasn’t just the Corvette’s stunning new looks; it was the all-new chassis and suspension. By late 1959 Zora Arkus-Duntov was in charge of Corvette engineering. When Bill Mitchell’s design team started work on project XP-720 (the all-new Sting Ray), Duntov was called in to set the parameters for an all-new chassis. The completed Sting Ray looked like the sportscar from another planet and the chassis had everything except four-wheel disc brakes. Today the running chassis looks like a buggy compared to the stout aluminum, steel, and magnesium chassis’ of the C5, C6, and C7 Corvettes. But in 1963 the top-performing L84 Fuelie engine only had 360 “gross” horsepower and 352-LB/FT of torque putting power-to-the-ground with 6.70×15 bias-ply tires. That’s not much twisting on the chassis, so the chassis was more than adequate.

Even when the high-torque big-blocks arrived in 1965, for street use, the Duntov chassis could handle the job. The design didn’t start to show its limitations until the 1968 L88 racing Corvettes with wide tires started competing in long endurance races. Tony DeLorenzo once commented that after long 12 or 24-hour races, their Corvettes needed new frames. Their solution to this problem was a Logghe Brothers full welded-in roll cage. Greenwood’s wide-body Corvettes were so reinforced many asked, “Is there still a Corvette in there?” But for street use and spirited driving, the Duntov chassis served the Corvette well until 1982. Lets look at the chassis’ basics to see why it lasted so long

The genius of Duntov’s chassis was how much lower the center of gravity was. Chevrolet engineer Maurice Olley was a production car chassis and suspension expert when he designed the C1 chassis. As a racing expert, Duntov knew he had to get the center of gravity much lower. The C1’s chassis had a parameter frame with x-bracing in the center for rigidity. The car’s occupants sat on top of the frame. Everything measured from there; the cowl height, engine height, and everything else.

Duntov’s design eliminated the x-brace so that the occupants could be placed down inside the frame, dramatically lowering every data point from there. For rigidity the new frame had five crossmembers. Duntov then mounted the engine and transmission as low and as far back as possible and routed the exhaust pipes through holes in the second frame crossmember. The passenger compartment was pushed back as far as possible and the spare tire was mounted below the back of the frame and under the fuel tank.

The lowering of the engine/transmission and passenger compartment lowered the center-of-gravity from 19.8-inches to 16.5-inches. Moving major components as far back as possible in the shorter 98-inch wheelbase created a front/rear weight distribution of 47/53-percent. The engine centerline was offset 1-inch towards the passenger side because passenger footwell requirements were less than the driver’s. The extra offset reduced the transmission tunnel width and allowed the crankshaft and rear axle pinion to be on the same centerline. Ground clearance was just five-inches.

The build of the frame used boxed longitudinal sides with five crossmembers that were designed to suit the needs of styling. The new frame actually received computer analysis to determine the thickness needed for the parameters of the overall car. The front crossmember was welded to the sides and not bolted-on like the C1 chassis. The new frame with mounting brackets weighed 260-pounds, the same as the C1’s frame, but torsion rigidity increased from 1,587 lb/ft to 2,374 lb/ft per degree.

The C2/C3 suspension was a parts-bin marvel, although it didn’t seem that way. Duntov wanted an independent rear suspension and was immediately told, “No! It’s too expensive.” To get around this, Duntov used almost 60 full-size passenger car front suspension parts, including pressed-steel wishbones and ball-jointed spindles, and just rearranged them. The parts had already been engineered and proven, thus saving production cost. With a 9-degree slope, the wishbones gave an anti-dive reaction upon heavy braking. Then the inner pivot points were lowered to raise the roll-center to 3.25-inches above the ground. A recirculating-ball steering unit was placed behind the suspension and used a hydraulic damper to reduce kickback. All of these changes were very apparent when combined with the right shocks and anti-roll bars when the cars were first driven and tested. The money saved was more than what went into the rear suspension.

The independent rear suspension started with the differential pumpkin bolted to the 4th crossmember with the driveshaft as a device to control forward thrust from the wheels. Axle half-shafts with universal joints are on each side of the differential. Steel box-section control-arms carry the outer half-shafts and attach to the rear frame kickup assembly. Shims at the forward pivot-points are used to adjust toe-in alignment. Strut rods attach to the strut-rod bracket bolted below the differential and connect to the rear spindle support on the control-arms. The nine-leaf transverse spring with polyethylene liners between each leaf to reduce noise, mounts under the differential and is sprung against the rear portion of the control arm with long bolts. Duntov’s proposal to use a transverse leaf spring was not well received by Chevrolet chief engineer, Harry Barr, but no one could come up with a better plan.

For its time, Duntov’s chassis worked very well, but I’m sure that no one imagined it would be used for 20 years. The design proved to be easy to update. Disc brakes were in development when the Sting Ray came out and arrived on the 1965 model. When the new Mark IV became available in 1965 the suspension got stiffer front springs and larger diameter front and rear stabilizer bars. The new chassis was totally adaptable and could be made near-battle-ready with suspension component changes. During the 20-years of Duntov’s chassis, Racer Kits included; the 1963 Z06, 1967-1969 L88, 1970-1972 LT-1 small-block ZR1, and the 1971 big-block ZR-2. And from 1974-1982 there was the FE7 Gymkhana Suspension for spirited street driving. On the street, Duntov’s chassis could easily handle the 327 Fuelie to the LS6 454.

In the ‘70s chassis changes were made to conform to tightening regulations. Starting in 1973 the chassis had to handle the new 5-mph crash bumpers and steel side-door guard beams. In 1975 catalytic converters helped reduce emissions, but cloaked engines. A steel underbelly had to added to the chassis as a heat shield against the very hot converters. 1980 saw a big weight reduction from 3,503-pounds to 3,336-pounds thanks to an aluminum differential, lighter roof panels, thinner material on the hood and doors, and the use of the aluminum L84 intake manifold on the standard engine. The following year, a fiberglass-composite rear leaf spring helped shed 29-pounds. Early ‘80s Corvettes don’t get much respect because their restricted engines, but their drivetrain and suspension was as good as ever. An early ‘80s Corvette with a classic SBC crate engine would make for a stout performer.

Yes, Duntov’s chassis looks crude by today’s standards. But Corvette development is always empirical. If it weren’t for the C2/C3 chassis, there never would have been a C4 chassis, and so it goes. – Scott

Corvette Chassis History, Pt 1 – C1 Chassis – HERE

Corvette Chassis History, Pt 2 – C2/C3 Chassis – HERE

Corvette Chassis History, Pt 3 – C4 Chassis – HERE

Corvette Chassis History, Pt 4 – C5 Chassis – HERE

Corvette Chassis History, Pt 5 – C6 Chassis – HERE

Corvette Chassis History, Pt 6 – C7 Chassis – HERE

 

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

Published on by Scott

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″ →

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

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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

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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” →

David Kimble’s Incredible Cut-Away Corvette Art Creations

Published on by Scott

Dateline: 2.13.12

The Master of Cut-Away Technical Illustration Automotive Art

Check out the slide show at the end of this post!

Please allow me to indulge myself and geeze a little. It seems that the farther north you are from the age of 50, the more times from the past begin to blur together. If you’re under 30 or 40 and are wondering what I’m talking about, just wait. I think it was somewhere around 1984 or 1985 the first time I saw one of David Kimble’s cut-away technical illustrations.

While Kimble had been working for many years as a technical illustrator for the US Navy, an RV company, the Chaparral Racing Team, the Harrison Racing team, and Sports Car Graphic Magazine, I believe that it was his 1984 technical illustration of the then-new 1984 C4 Corvette that put him on the automotive map. If it wasn’t his ‘84 Corvette cut-away that I first saw, then it was his Ferrari F40 cut-away that appeared in Motor Trend that definitely caught my attention. In the early ‘80s I was a freelance commercial artist specializing in machines. There was a wonderful magazine for commercial and graphic artists back then titled, “Step-By-Step Graphics” that was truly awesome for aspiring artists. Each issue featured several articles that took you on a step-by-step overview of exactly how the artist created their works. It was a terrific magazine.

Here’s the artist, himself, David Kimble, holding his new book, “Cutaway – The Automotive Art of David Kimble.”

One issue had a feature story covering David Kimble’s unique approach to the classic “cut-away” style of technical illustration. I was already familiar with James A Allington’s cut-away illustrations from a series of Shell Oil print ads that ran in the late 60s featuring famous road racing cars, such as the Ford GT40, Jim Hall’s Chaparral, and others. But Kimble’s style was quite different and unique. Where as most cut-away technical illustrations show what’s under the car’s body by illustrating a section of the body that seemed to be snipped away, Kimble created a new dimension to the “cut-away” body sections. David’s illustrations looked as if most of the car’s painted body was transparent. Parts, such as tires, wheels, floorboards, dash panels, transmission cases, valve covers were either transparent or used the traditional “cut-away” technique. When you look at a Kimble technical illustration, you experience a journey of discovery. For us gearheads, Kimble’s art satisfies the the question, “What’s under there?” Continue reading “David Kimble’s Incredible Cut-Away Corvette Art Creations” →

Vette Polls: What Is Your Favorite C4 Corvette?

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Dateline: 10.1.11
With 13 Model Years and Eight Unique Special Versions, Vote For Your Favorite! 

Cast your vote at the bottom of this post

When the new 1984 Corvette was shown to the automotive press in the Summer of ‘83, there was a wave of euphoria. “FINALLY!!! A New Corvette!” As there should have been. After all, the Shark had been with us since 1968 and the steel parameter frame and suspension since 1963. The chassis was designed somewhere around 1960! So you could say the car was a little over due for an update.

In retrospect the C4 was an extraordinary generation. It came with 205-horsepower, went out with the 330-horsepower LT4, and maxed out with the 405-horsepower LT5. Here are the highlights:

* Domination of 1985 to 1987 Showroom Stock Series
* 1986 Indy 500 Convertible
* 1987 to 1991 Callaway Twin-Turbo Option
* 1988 35th Anniversary Edition
* 1988 Callaway 254.76-MPH Sledgehammer
* 1990 to 1995 ZR-1
* 1990 Morrison ZR-1 24-Hour Speed Record of 175.885-MPH
* 1992 LT1 as the base engine
* 1993 40th Anniversary Edition
* 1995 Indy 500 Pace Car Replica
* 1996 Collector Edition
* 1996 LT4-Powered Grand Sport

C4 Corvettes are at rock bottom prices these days and there were so many built that if you cut one up and make it into a hot rod, no one will howl at you. That is, unless you cut up a Grand Sport. I’ve read comments from some fellows stating that for them, the appeal of a C4 is that it still has that “rough muscle car” feel to it. As a generation, the C4 had a lot to offer and today, they make excellent entry level Corvettes. I’ve seen early C4s with a little Continue reading “Vette Polls: What Is Your Favorite C4 Corvette?” →

Vette Shows: The Sights of C4 Corvettes at the 2011 30th Corvettes at Carlisle Show

Published on by Scott

Dateline: 9.1.11
2011 Corvettes at Carlisle Week continues with coverage of 1984 to 1996 C5 Corvettes!

This is Michael Beal's custom 1991 ZR-1 Roadster. The LT-5 engine in the car was built by Corvete racing legend Kim Baker.

From 1984 to 1996 the C4 Corvettes arguably made more progress in terms of performance than any other generation Corvette. The ‘84 model arrived with the 205-horsepower “Cross-Fire Injection” engine and was quickly replaced with a real “fuelie,” the 230-horsepower L98 Bosch Tuned Port Injection engine. By ‘90 the 375-horsepower LT-5 engine arrived in the new ZR-1 and was bumped up to 405-horsepower by ‘93. The L98 received incremental improvements and hit 250-horsepower by ‘91 and was replaced with the 300-horsepower LT1 in ‘92. So, we saw some impressive power gains during the rein of the C4s.

And there were several interesting special edition C4s as well. There was the ‘86 Pace Car Special, the ‘88 35th Anniversary Edition, the ‘90 to ‘95 ZR-1 option (the single most expensive optional package in Corvette history!), the ‘93 40th Anniversary Edition, the ‘95 Pace Car, the ‘96 Collector Edition, and the ‘96 Grand Sport. That’s tremendous progress and consistent special editions that kept the C4s fresh and interesting.

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Corvettes so heavily dominated the SCCA Showroom Stock racing series they were kicked out! So, the Corvette Challenge “Corvettes only” race series was created. Morrison Motorsports blasted a 50-year speed record with a mildly-modified ZR-1 and Callaway build their 898-horsepower, 254.76-MPH Sledgehammer. Tuners such as Callaway, Greenwood, and Guldstrand offered Continue reading “Vette Shows: The Sights of C4 Corvettes at the 2011 30th Corvettes at Carlisle Show” →

Tom Falconer & James Mann C4 Corvette Book Review

Published on by Scott

Tom Falconer's Collector's Originality Cuide for Corvette C4

“Collector’s Originality Guide: Corvette C4 1984 – 1996” by Tom Falconer & Photography by James Mann

The introduction of the C4 Corvette in the Fall of ‘83 was a much anticipated automotive event. Times were tough through the ‘70s and no one anticipated in ‘68 that the new Mako Shark-inspired car would have a 15-model-year production run. And when you consider that the car was riding on a chassis designed in ‘60-’61 for the C2 Sting Ray, it’s all the more amazing that the late C3 cars set all-time sales records.

Just like all Corvettes from the beginning, the C4 was a car that was in constant evolution. Every year, Corvette Chief Engineer, Dave McLellan and his devoted crew of engineers and stylists made small improvements, with an occasional big leap forward. Little did we know when the C4 was first shown at the end of ‘83 that this Corvette generation would last almost as long as the C3 generation – 13 model years. Continue reading “Tom Falconer & James Mann C4 Corvette Book Review” →