Vous êtes ici : PassionPorsche >

octane

Porsche: concepts mules and prototypes

Before any new model goes into manufacture the design – in various stages of finalisation – has to go through practical testing. These vehicles are prototypes, recognisably and most often visually identical to the subsequent production vehicle.

Far less frequently these days, where more extensive research and dynamic development can be carried out with software simulations, a manufacturer experiments with a radical new idea by building some of the technology into the preceding model. These cars are often referred to as ‘mules’.

In the past, the need to keep particular experiments confidential even led to some mules wearing total disguises to fool both press and competitors.

Examples of this at Porsche include the Audi 100 Coupe, into which Weissach shoehorned the 928’s V8 and running gear; later the 928’s innards would also be built into an Opel Diplomat.

Concepts are used by manufacturers to float an idea, to test acceptability of a particular design or style. A phenomenon which in today’s homogenised and regulated auto industry has become unusual, the most successful example in Porsche history was the Boxster concept, greeted with standing ovations when it was revealed in 1993.

That the resultant Boxster – which would closely prefigure the new 911 – was so similar to the concept was a tribute to Porsche’s original design, achieving homologation with a minimum of compromises which usually dilute and sometimes completely spoil the original idea.

The real workhorses of pre-production are, of course, the prototypes, masked these days if their makers want to hide them by an astute application of chequered tape, which brilliantly sabotages visual perspective.

Of the thousands of prototypes built, virtually all of them are subsequently broken up, occasionally to the dismay of auto historians. In deference, however, to the interest they generate, Porsche has selected a handful of the more remarkable prototypes it has kept, and sometimes displays them at the Museum at Zuffenhausen…

FacebooktwitterpinterestlinkedinmailFacebooktwitterpinterestlinkedinmail

Pour consulter l'article original et complet, cliquez ici.

Fast Porsche Speedster

“The engine was the spare, well, it was what became the spare engine; it had been the primary engine in HR2, the 962 which I raced. It was the Daytona engine,” says Bruce Canepa.

It isn’t every shop that has such an engine going spare, and when Las Vegas casino owner Gary Primm contacted Canepa about the disappointing 1989 911 Speedster he’d just had delivered, the stars aligned.

Primm had driven his Speedster about 100 miles and found it lacking, calling Canepa to ask: “What can we do with this thing? It’s boring, and slow,” Primm and Canepa having collaborated previously on an AMG build.

It didn’t take Canepa long to figure out what to do with the Speedster. He admits: “They were pretty underwhelming. They had no power, they had a Turbo chassis, which was almost too much car for the motor, and they were flexy.”

He thought for a while before fixing on the idea of a 934 for the road. “Really, the nicest thing about Primm and a lot of my customers is he just let me build what I want,” says Canepa. “He didn’t really know what a 934 was. I said ‘we’re going to put on 934 flares; they look cool. We’re going to make it look like a Porsche race car, but with no roof on it.’”

The result is sitting in Canepa’s showroom in Scotts Valley, California. I’ve been poring over it for over an hour. Even here among Porsche rarities of
the like you’ll seldom see outside Porsche’s own Stuttgart Museum, the Speedster is a knockout.

G1 Guards red, because that’s how it was delivered to Canepa (all of Primm’s cars are red), the build is so beautifully executed it could easily be a factory car, albeit a very special one.

The deep front splitter has its outer cutouts filled by running lights behind Perspex, and the remaining three large intakes are pure 934 race car. In the unlikely event that the front bumper left you guessing, this is a Speedster unlike any other. Those 934-proportioned flared arches front and rear, covering 17-inch, three-piece BBS alloy racing wheels, leave little doubt.

Those punctured rear wings feed intake air into the engine, this Speedster taking the idea of a Turbo-bodied Speedster to its ultimate incarnation. Only unlike the standard cars, the visuals are more than matched by the mill…

FacebooktwitterpinterestlinkedinmailFacebooktwitterpinterestlinkedinmail

Pour consulter l'article original et complet, cliquez ici.

Porsche 930 3.0: reviving an icon

There are few icons greater in the Porsche stratosphere than the 930 3.0. The first 911 supercar, Porsche’s Turbo nomenclature has survived to this day – and it all began in 1974 with that wide-arched and whale-tailed 930.

Today, those early 3.0-litre cars are highly sought-after among collectors as the archetypal Porsche 911 Turbo. Finding one is the biggest task, particularly from the first model year of 1975 when just 274 examples were built for worldwide markets. It is estimated only 20-30 of these original cars exist today.

From there, condition and provenance is key – which is why we believe this example, expertly curated by Mash Motor, to be one of the best examples of early 930 3.0 on the planet. Brilliantly restored (though still retaining original parts including the 930’s thicker carpets) car no. 55 of that original 274 is a special car.

Delivered on March 5th 1975 to Porsche Centre Autorama in Verona, Italy, as an exhibition car, chassis 5700065 was bought by a Swiss customer. It subsequently lived in Austria, owned by the renowned Porsche author, Dr. Georg Konradsheim, before being sold to its current owners who recently completed a painstaking two-year restoration to bring the matching-numbers car back to its original Copper brown hue.

Cover star of our issue 181, chassis 5700065 is one of the best examples of 930 we’ve driven. Below you’ll find a gallery of the car’s thorough restoration back to 100% original specification. This special 930 is now for sale – interested parties should contact Mash Motor.

FacebooktwitterpinterestlinkedinmailFacebooktwitterpinterestlinkedinmail

Pour consulter l'article original et complet, cliquez ici.

Turbo v Carrera: 930 3.0 vs 2.7 MFI

After the swing of the 1960s, the 1970s are often lambasted, wrongly viewed as a decade of energy crises, political upheaval and scandal. The reality is that while the 1970s might have been a turbulent decade, they were also arguably a turning point in the modern world. 

Those energy crises did raise global concerns over consumption and, unsurprisingly, the car was in the firing line, particularly in the US. Increasing legislation for fuel economy and emissions, as well as safety, demanded change. That created problems for Porsche with the 911.

The 911s of 1970’s America would feature detuned engines to pass economy standards, EU and RoW cars largely escaping those, though those US regulations would have a pronounced impact on how the 911 would look. 

From 1973 onwards US domestic and imported cars had to survive a 5mph collision without any damage to the headlights, engine or safety equipment. The 911’s bumpers had to change, with the US regulation demanding innovation.

The G-series bumpers were born, revolutionising the 911’s look and ensuring it would pass not just the 1973-onwards regulations, but also the later zero-damage standards that would come into force over the next decade. 

Porsche evidentially thrives on the challenges posed by regulation, and those US rules forced the company’s hand changing the 911’s look. The styling department is credited as being responsible for those iconic bumpers, under then-director Anatole Lapine and a team consisting of Wolfgang Möbius, Dick Söderberg and Peter Reisinger. 

In contrast to so many rivals’ hastily devised, somewhat awkward efforts, Porsche’s solution to the regulations was beautifully integrated and simply engineered. Larger, higher, body-painted bumpers with neoprene rubbing strips were adopted, to which functional ‘bellows’ which compressed on impact were fitted.

The bellows were a neat solution which allowed the bumpers to move as much as 50mm, and were attached to collapsible steel tubes on European cars and hydraulic shock absorbers on US cars. The new bumpers were instrumental in the relocation of the battery, too, the now single battery being located in the luggage compartment in front of the left-hand front wheel, improving the weight distribution.

The rear would see a similarly styled wrap-around bumper hung off a complex aluminium extrusion, the lightweight metal adopted to keep additional mass at the rear to a minimum. Above the rear bumper Porsche adopted a reflective red band, joining the rear lights in with a styling element that’s largely pervaded the 911’s rear visual signature ever since. 

FacebooktwitterpinterestlinkedinmailFacebooktwitterpinterestlinkedinmail

Pour consulter l'article original et complet, cliquez ici.

Porsche 991 hybrid test drive

The internal combustion engine doesn’t realise it’s there,” says Chuck Moreland, owner of Elephant Racing. You might know the company – it’s a specialist in Porsche suspension – but here Moreland’s talking about the flat six in an early 991.1 3.4-litre Carrera.

Specifically, he’s talking about the Vonnen Shadow Drive, Vonnen an Elephant Racing offshoot that’s developed a hybrid 911 before Porsche itself. If it was going to be done anywhere outside Weissach, then it’s hardly surprising it was here.

Vonnen is in California, specifically Silicon Valley, the absolute global heart of innovation and technology. Moreland explains how it happened: “It was a case of us sitting around talking among ourselves and thinking, ‘hey, wouldn’t it be great if…’. And then we started exploring different ideas of how you might hybridise an existing 911 platform.”

That was three years ago. Today we’re standing around an engine and gearbox, looking at the axial flux electric motor that Vonnen has developed with a European supplier, sandwiching it between the two.

If that sounds familiar, it’s exactly what Porsche will do with the 992 to hybridise it, only it’s left space inside the gearbox to do so. With the 991 there’s no such luxury, so Vonnen had to get clever with the space it had.

It’s been a quick development cycle, especially considering this wasn’t Vonnen’s first solution. Initially Vonnen tried pushing electrically generated drive back into the gearbox via the front-axle output shaft on a 996 Carrera 4.

Moreland says: “That was more a proof of concept, but we learned a lot from it, and we recognised that there was real opportunity for improving. The biggest issue was that the torque was being added on the output shaft of the transaxle, so we weren’t taking advantage of the gear-reduction capabilities from the gearbox.”

Buoyed by the potential, Moreland went all in, saying: “Okay, cost be damned, what if we wanted to make this thing rip? What would we do?” And so we went back to the drawing board and this is what we dreamed up, and it basically addressed all the issues that existed with this car. And that’s how we got where we are.”

Squeezing an electric motor between the engine and transmission adds 26mm in length. That’s required some modification of the structure fore of the gearbox to allow clearance, the electric motor replacing the flywheel, as well as the starter motor,  and taking over all the functionality of it, including stop-start, if fitted. The batteries powering it are situated in the luggage area, robbing it of some space. 

FacebooktwitterpinterestlinkedinmailFacebooktwitterpinterestlinkedinmail

Pour consulter l'article original et complet, cliquez ici.

Suivez-nous…

Catégories

Archives

Amazon business

Audible