Tag Archives: Block

Hot One Of Fifteen – 1955 Chevrolet Bel Air Indy Pace Car

For 1955 Chevrolet launched it’s second generation full size Bel Air range, to replace the almost entirely new 1954 Bel Air. with two tone paintwork and for the first time a new 4.3 litre 265 cui V8 ‘small block’ engine option that would remain part of General Motors product mix with many improvements over several decades.

Chevrolet Bel Air, Goodwood FoS

The crisp clean styling of the 1955 Bel Air was set off by a Ferrari inspired chrome square potato chip grill as seen on the car below photographed at last years Goodwood Festival of Speed.

Chevrolet Bel Air, Goodwood FoS

Alongside two straight six motor options the new ‘small block’ came tuned with either a 162 hp Turbo-Fire with twin barrel carburetor, 180 hp Power Pack Super Turbo – Fire with four barrel carburetor or towards the end of the model year a 195 hp competition option with a high compression motor.

Chevrolet Bel Air, Goodwood FoS

Being selected to perform pace car duties for the 1955 Indy 500 is reckoned to have given Chevrolet’s Bel Air marketing campaign a terrific boost, it is said that a fleet of 15 two tone Red & White Bel Airs were in attendance at what proved to be an unforgettable race.

Chevrolet Bel Air, Goodwood FoS

Chevrolet Sales Manager Thomas H Keating was given the honour of pacing the field for the Indy 500 on May 30th 1955 and he can be seen at the wheel of what Keating claimed to be a 180 hp vehicle, on this linked photo, sitting beside him is thought to be Indianapolis Motor Speedway owner Tony Hulman. The linked photo is telling for what it does not show, namely it is quite clearly not about to pace the Indy 500 and as we shall see it might not even be the actual vehicle used to pace the event.

Chevrolet Bel Air, Goodwood FoS

The give away as to which vehicle paced the event can be seen at 13m 37 secs into this linked clip when the pace car that actually led the field away can be clearly seen to be carrying a movie camera in the boot / trunk necessitating a rather large slit to afford the camera rearward vision and to accommodate the upper film reel. No one knows for sure what happened to that particular car after the event.

Chevrolet Bel Air, Goodwood FoS

Bill Vukovich looked to be on course for a third straight Indy victory in 1955 with a 17 second lead on the 57th lap, of 200, when he ran into someone else’s accident and ended flying over the back stretch perimeter fence and coming to rest up turned and on fire giving the two time defending champion no chance of survival. Bob Sweikert who had worked his way up from 14th on the grid, and was second in the John Zink Special at the time of the accident crossed the line 3 hours 53 mins and 59 secinds after the Bel Air pace car had entered pit road to start the race.

Bob took home one of the fifteen Bel Air pace cars with his wife and their kids, he went on to win the 1955 AAA big car championship and Midwest Sprint Car Championship, becoming the only winner of what is known cumulatively as the American Motor Sports Triple Crown. The following year Sweikert was killed in a sprint car accident at Salem Speedway racing Ed Elisan whom he had raced as a teenager in his home town of East Bay California.

Thanks for joining me on this ‘Hot One Of Fifteen’ edition of ‘Gettin’ a li’l psycho on tyres’ I hope you will join me again tomorrow. Don’t forget to come back now !

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Big Block Pagoda – Iso Grifo Super 7 Litri Series I

Iso Rivolta was the brainchild of Italian Engineer Renzo Rivolta who had been responsible for Isothermos refrigeration units prior to World War 2.

Iso Griffo Super 7, Silverstone Classic

Wishing to move into motorised transport markets Rivolta developed a range of expensive but well built durable motorcycles from 1948 to 1961.

Iso Griffo Super 7, Silverstone Classic

In 1950’s Renzo developed his best known vehicle the Isetta Bubble Car that was manufactured by Iso in Italy and under licence by Velam in France, Romi in Brazil and most successfully by BMW in Germany.

Iso Griffo Super 7, Silverstone Classic

After leaving Ferrari in 1961, where he had been responsible for the fabled Ferrari 250 GTO, Giotto Bizzarrini set up his own design studio and in 1963 designed the mechanical architecture of the Iso Griffo A3/L. The Grifo,launched in 1963, featured a blueprinted, a process of disassembling a motor then rebuilding it with all the engine parts matching the exact original engine blueprint design specifications for optimal performance, 400 horsepower small block Chevrolet motor.

Iso Griffo Super 7, Silverstone Classic

In 1968 the Grifo was made available with a 435 hp Chevrolet 427 big block motor, requiring the pagoda like air scoop on the bonnet to accommodate the extra height of the larger engine,

Iso Griffo Super 7, Silverstone Classic

along with extra ventilation in the front wings to keep the motor cool, seen on this vehicle which was built in 1969.

Iso Griffo Super 7, Silverstone Classic

The Grifo 7 Litri was said to be capable of 186 mph.

Iso Griffo Super 7, Silverstone Classic

It would appear that just 67 of the 7 Litri Series I vehicles were produced from 1968 to 1970 when the rarer Series II Grifo’s with pop up head light covers were introduced.

Iso Griffo Super 7, Silverstone Classic

The combination of rarity, Bertone styled beauty and mechanical simplicity, a result of using many proprietary parts including the engine and gearbox, makes the Grifo a relatively easy to maintain collectible car.

Thanks for joining me on this 7 Litri edition of ‘Gettin’ a lil psycho on tyres, I hope you will join me again tomorrow. Don’t for get to come back now !

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