Tag: small-block chevy

Chevy’s Secret Duntov Engines Hot Rod Mag E-Book

Published on by Scott

Duntov’s Dec 1967 Hot Rod Magazine Cover Story; Secret Exotic Chevy Engines

You can download your PDF booklet HERE.

Car magazines were my friends when I was a young teenager in the late ’60s. While I was crazy about Corvettes, there were no road racing tracks, only a drag strip close to where I lived in Collingswood, New Jersey. So, if I wanted some racing action, the drags was it; which was fine by me because tire-burning muscle cars regularly roamed the streets of our town, and were SO COOL.

Zora and his brother, Yura were making and selling their Ardun hemi-head conversion kits for flat-head Fords in the early 1950s.

Hi-Performance CARS, Popular Hot Rodding, Car Craft, Car and Driver, Car Life, and Hot Rod Magazine were my favorite flavors for fun reading. But somehow, the December 1967 issue of Hot Rod got past me, as I did not see that issue until way after eBay sellers started selling them 20 years ago. Recently I picked up a copy to add to my Corvette library.

The BIG SPLASH is the cover! There was Zora on the cover of Hot Rod, in a corporate gray suit, white shirt, a narrow black tie, and all smiles; but then again, Zora never knew a camera he didn’t like. And why wouldn’t he have been a happy guy, sitting there with four exotic experimental Chevrolet engines; single-overhead cam heads, and double-overhead cam heads with fuel injection systems of different configurations. Duntov even pushed to offer a SOHC kit for small-block Chevy engines via the Chevrolet Parts Catalog! Imagine that under the hood of your Vette!

Hot Rod’s editor, Jim McFarland got the plum assignment to go to Detroit with a recorder and interview Duntov about “some” of the experimental engines Chevrolet engineers were playing with. After the sixth paragraph, McFarland turns over the mic to Zora to take it from there. Duntov was very exacting and articulate in explaining everything he was allowed to talk about. Zora may have been the ultimate corporate misfit in his time, but he knew when to stop talking.

Here’s Zora and Jim McFarland many years after the famous Hot Rod Magazine “Inside Chevy’s Secret Engines!” December 1967 cover story.

The article is a fascinating peek inside the thinking of Chevrolet performance engineers, circa 1967. Enjoy! – Scott

PS – You can download your PDF booklet HERE.

PSS – You can access the entire collection of Corvette E-Booklets and the Duntov Files HERE.

1963 Fuelie Corvette vs 1967 L71 427/435 Corvette – Videos

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Performance Bookends of the Shortest Generation Corvette, the C2 Mid-Year
Dateline: 6.23.17 – The difference between a 1962 and 1963 Corvette is staggering. In 1963, the new Sting Ray looks like the sports car from another planet! The only carryover components used for the new Corvette were the base and optional engines. Everything else (body, interior, suspension, and frame) was all-new. The C1’s basic structure was created in 1952, and over the years was given slight tweaks, such that by the late 1950s, the Corvette was holding on against the European cars. But the new Sting Ray was a game-changer.
We’re going to look back at the first and last “performance” Corvettes – the 1963 Fuelie and the 1967 L71 427/435. The Sting Ray had an all-new parameter frame that would ultimately serve as the foundation of the Corvette up to 1982! The new C2 frame allowed the passenger seats to be located “down and inside” the frame rails, unlike the C1’s frame that located the seats “on top” of the frame, thus allowing the overall design to be lower and more slender. Although the shape looked “aerodynamic, it suffered from severe “lift” at high speeds. The lift issue was a combination of the body shape, and the rear suspension “squat” upon hard acceleration – and was never really solved, just dealt with.The independent rear suspension and updated front suspension made the 1963 Corvette the only American car with four-wheel, independent suspension. This was a very BIG deal then. The new interior was just beautiful. The dash had double-arches with a perfectly laid out array of the proper sports car gauges. From 1953 to 1962, the Corvette was a convertible with an optional bolt-on hardtop. The new Sting Ray was a production of Bill Mitchell’s 1959 Stingray Racer – a beautiful car with big aerodynamic problems. Instead of a convertible-only version, there was a coupe version with the now classic “stinger” design. The hidden headlights were show-car-like, and rotated horizontally along the front leading edge when the lights were turned on.

The rear glass had a split down the middle so that the crease that started at the front edge of the roof could run uninterrupted back to the end of the car. This was the infamous “split-window” that was a love-it, or hate-it detail and was Bill Mitchell’s pet design element. The split-window was gone after 1963 – making the 1963 coupes a rarity. 1963 convertibles outsold coupes, 10,919 to 10,594. Some coupe owners replaced their split-window with a 1964-1967-style rear glass! Continue reading “

1963 Fuelie Corvette vs 1967 L71 427/435 Corvette – Videos” →

1996 LT4 Small-Block Chevy – The Finished Classic SBC?

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Dateline: 9.30.11
Forty One Years of Classic Small-Block Chevy Success and Power!

When the Cadillac-derived Small-block Chevy engine first arrived in 1955, I’m certain that Ed Cole and his team of Chevrolet engineers never imagined that their efforts would have such a profound and long lasting impact on the automobile industry. The little 265-cubic-inch engine had just 162-horsepower. By 1970 the 350-cubic-inch LT-1 engine was packing 370 gross horsepower. Beginning in 1973 Gm started rating their engines in “net” figures making it look as if the legs had been cut out from under all of their motors. While it’s true that there were emissions restrictions and reduced compression, the “net” power ratings were in real-world terms, closer to reality. From ‘73 to ‘96 it was a long slow slog, but the last SBC to use the basic original design was the 330-horsepower LT4. So, what would be the ”gross” horsepower rating of a ‘96 LT4? That would be anyone’s guess, but somewhere close to or over 400-horsepower would be a good guess.

Since Spring ‘11 I have been asking the question in my Illustrated Corvette Series VETTE Magazine column, “What’s the best _____?” for each generation Corvette. ICS No. 174 takes a look at the 1996 LT4 Corvette and asks, is this “The Finished Classic SBC?” let’s get into the details. Talk about going out with a roar! Enjoy – Scott

Illustrated Corvette Series No. 174: 1996 LT4 Small-Block Chevy – “The Finished Classic SBC?”

The ‘97 C5 Corvette was introduced to the press in November ‘96 at Road Atlanta Raceway, in Georgia and went on sale at Chevrolet dealers on March 7, 1997. Not only was the body, interior, chassis, and suspension all-new, there was a totally new engine and transaxle. The splash the new C5 created, followed up with roadsters, Pace Cars, hardtops, race cars, and a Le Mans win in ‘01, was so huge that the highlights and achievements of the C4s quickly faded. While the jewel-like LT-5 that powered the exotic ZR-1 still stands as the high watermark of the C4 generation, there was a quieter high watermark that took place. Had the LT4 engine option arrived a few years before, there would have been another Chevy legend.

The C5 program was an on-and-off-and-on again project due to GM’s financial troubles in the early ‘90s. Initial sorties began in ‘88 with the intention of an all-new C5 a ‘93 model. Corvette chief engineer, Dave McLellan was given a budget of $250 million, but that number turned into a roller coaster ride with the C5 being pushed back year after year. GM’s miracle of the ‘90s was that there even was a C5 Corvette. All of this makes the LT4 even more amazing. Continue reading “1996 LT4 Small-Block Chevy – The Finished Classic SBC?” →

Corvette Timeline Tales: Happy 102nd Birthday, Ed Cole

Published on by Scott

Dateline: 9.17.11
“Kick the hell out of the status quo!” – Ed Cole

Ed Cole was one of what I call, “The Four Fathers of the Corvette.” The first Father of the Corvette was Harley Earl, the designer and creator of the Corvette. Earl was the “Idea Guy.” Ed Cole was the “Go-to” guy. Ed was already the chief of engineering of Chevrolet in ‘53 and was working on what would become the Small-Block Chevy engine. He was also the man that hired Zora Arkus-Duntov. The third Father of the Corvette was Zora Arkus-Duntov. Were it not for his at times, unbridled passion and insistence that Corvettes were successful at the race track, the car wouldn’t have survived the ‘60s. And the fourth Father of the Corvette was Bill Mitchell. His Sting Ray and Mako Shark II designs forever defined the Corvette “look.”

While Cole was one of the top engineers of his day, he did not start out wanting to be in the car business. When he first started attending Grand Rapids Community College as a lad, he wanted to become a lawyer! But a part-time job in an auto parts supply store hooked him into cars. He enrolled in General Motors Institute and got his engineering degree and a job at GM. Cole and Harry Barr co-headed a team to design and develop the revolutionary 1949 Cadillac V8 engine. It was the Cadillac engine project that set Cole up to be the lead man on the Chevrolet small-block engine project. Just stop and reflect on what an enormous contribution to Chevrolets and racing the all-time classic Small-Block Chevy engine is.

I called Ed Cole the “go-to” guy because of his relationship with Duntov. Zora was quite an anomaly inside of General Motors. The prevailing attitude towards Duntov and Cole was likely, “You hired him, he’s yours!” It turned out that Cole was Duntov’s corporate angel and he always had Ed’s ear.

The book, “Zora Arkus-Duntov – The Legend Behind Corvette” by Jerry Burton is filled with wonderful stories about Cole and Duntov. One amusing story happened in early 1956 just after Cole and Duntov took a modified ‘56 Chevy Belair to Pike’s Peek and broke several records. After the event, while the guys were celebrating over drinks, Zora told Ed, “We should show the world that the Corvette is no longer an underdog. Let’s show how fast the car will really go.” Cole asked, “How fast is that?” To which Duntov just pulled a number out of the air and said, “Oh… maybe… 150 miles per hour.” Cole was interested, but reminded Zora that his main responsibility was the development of the fuel-injected engine. Zora took Cole’s interest as a go-ahead and started working on body modifications that would eventually lead to the speed record run on the sands of Daytona Beach with John Fitch, Betty Skelton, and himself driving modified ‘56 Corvettes. Duntov was a loose cannon, and he was Ed Cole’s loose cannon.

After Cole was made general manager of Chevrolet in ‘56, he embarked on an over-the-top project called the “Q-Chevrolets.” Cole was fascinated with the idea of using a transaxle on all Chevrolet cars (Corvette included) by 1960, with a marketing angle of Continue reading “Corvette Timeline Tales: Happy 102nd Birthday, Ed Cole” →

The POWER of the Corvette

Published on by Scott

From the Blue-Flame Six to the Mighty LS9,

a Salute to Corvette Engines

Check out the SLIDE SHOW at the bottom of this post!!!

If you are new to the Corvette hobby, it’s hard to realize that 57 years ago the car began as a 150-HP beauty queen, made from a new and exotic material called “fiberglass,” available in any color, so long as it was white. As soon as Duntov could get his “magic hands” on the first small-block Chevy, the party began. Dual quads showed up right away and before we knew it, in ‘57 we had a fuel-injected Corvette. Take that! European exotics! F.I. is common today, but back then, wow, that was American-style autoexotic.

Corvette engines all have a story – small-blocks, big-blocks, the new LS series engines. Continue reading “The POWER of the Corvette” →

Stunning Die-Cast Corvette Engine Models

Published on by Scott

Corvette Engines As Miniature Automotive “Art”

Note the quarter on the display base for scale.

Modern high-performance engines are just amazing machines. A quick look at the most powerful production engine to ever come out of Detroit is the supercharged LS9 ZR1 Corvette engine. This 376-cubic-inch engine has a Net horsepower rating of 638-HP. Measured in the old “gross” power rating system and the number would be easily be in the low 700-HP range. The ZR1 and it’s little brother the 505-HP Z06 can easily smoke ANYTHING from the old glory days of the stump puller muscle car era and get double the gas mileage to boot!

But this isn’t about numbers, it’s about aesthetics. Take the plastic or carbon fiber covers off on any LS-powered Corvette and you’re greeting with a maze of complicated hardware. I guess I’m “old school,” but I enjoy looking at old, pre-smog control device muscle car and racing engines. The simplicity of those old mills was oftentimes “art.” Continue reading “Stunning Die-Cast Corvette Engine Models” →