Extensive Tyre Test Programme for Older Model Series

Porsche has extended its demanding approval process for winter tyres to include tyres for young and old classics. Offering customers this unusual service, the German manufacturer of sports cars enables drivers of older models to use the best available products on their car. Porsche is therefore providing valuable help and orientation particularly in the process of choosing new winter tyres with safe driving characteristics also on snow and ice. A further point is that this makes Porsche one of the few car makers to offer such an elaborate tyre approval process.

Well over 70 per cent of all Porsche sports cars ever built still exist today and are still driven actively in most cases – in both summer and winter. Indeed, even classic Porsche models more than 20 years old still offer the kind of performance today one would expect of a modern sports car. But the tyres fitted when such old and new classics were still in production have no longer been available for years. Tyre treads and rubber compounds have changed in an ongoing process of development, thus influencing the driving behaviour of such old Porsche models.

Conducting elaborate tests, Porsche’s engineers determine which of the tyres available today harmonise best with the features of a classic Porsche. The highlight in this testing and approving process is an extensive test programme up north in the Polar Circle.

Numerous Porsche models built in former years, among them the 911, 928, 964, 993 and 996, and then all the way to the first Boxsters, have been tested for this purpose on countless laps at the Arctic Driving Center in the Finnish town of Rovaniemi.

The criteria to be fulfilled by the tyres tested in order to receive approval by Porsche are so strict that not all tyres met the test requirements. The characteristics and features typical of an older air-cooled 911, for example, form an challenge not easy to overcome.

Further tests for dry and wet handling on test routes free of snow round off the test programme as such. Information on which tyres are recommended for which Porsche model is presented on Porsche’s website (www.Porsche.com) and is also available at all Porsche Centers.

- Porsche

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Falken Tire has designed and built a dynamic high mileage performance touring tire, which fits the needs of a wide market of vehicles. With an 80,000-mile limited mileage warranty, the SN211 offers long-term confidence and mile-after-mile comfort. Technological advantages are readily apparent through a variable sipe depth design, four optimized circumferential grooves and treadwear indicators. Best of all, the SN211 delivers maximum value and superb year-round performance.

Available in a wide range of original equipment replacement sizes, from 14-inch to 18- inch diameters, the SN211 is the tire for today – well-engineered and stylish, enhancing the look of popular coupes, sedans and wagons with a premium and sport-inspired appearance.

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Check out more pics over on Griot’s events page. Once spring kicks in, we hope to have some reviews on Griot’s products!

What happens when over 400 Porsches invade a small town in Ohio? Porsches 2 Oxford! July 26, drivers from as far away as California descended on the small college town of Oxford for what is becoming a legendary event in Porsche circles.

As the exclusive Car Care sponsor for the event, Griot’s Garage answered questions in a pair of how-to seminars, provided detailed demonstrations on customers’ cars, and still found time to enjoy the incredible collection of fantastic Porsche vehicles. Even an ultra-rare (in the U.S.) Porsche tractor showed up to partake in the festivities!

Griot’s Garage was proud to sponsor the Preservation Award, and it was a tough year to pick our favorite. Mac McGregor and his 1984 911 Targa stood out from the crowd, not only for the superior finish of the car but also for its story. Mac’s is a single owner car that has been lovingly cared for over the years. The 911 was a perfect example of dedication to preserving an amazing car and a testament to ‘Having Fun In Your Garage!’

At the end of the day, the winners’ parade started in front of our booth and we enjoyed seeing the storied history of Porsche line up right before our eyes! From casual to competition, unique to over-the-top, Porsches 2 Oxford has it all.

- Griot’s Garage

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Our Project New Beetle‘s heart is the 1.8T engine from Volkswagen/Audi. If your reading this and do not know what this means, it’s a turbo-charged 1.8L engine. It started life at 150hp and now sees around 210hp. In stock form it requires premium grade gas at 91 RON. It has been chipped (GIAC USA) which is written for 91-93 RON.

Do yourself, your engine and wallet a favor, fill your tank with the rating it requires. If you purchased a high performance car requiring a 91 RON or higher, don’t try to save pennies/gal cause in the end it just may cost you more!

Also, please maintain your car. Check/replace air filter, tires inflated and fix CEL (Check Engine Lights). Example: your O2 Sensor is out which measures your air/fuel mixture. A bad one will result in poor gas mileage!

Why the need for premium gas?

The octane rating is a measure of the resistance of gasoline and other fuels to detonation (engine knocking) in spark-ignition internal combustion engines. High-performance engines typically have higher compression ratios and are therefore more prone to detonation, so they require higher octane fuel. A lower-performance engine will not generally perform better with high-octane fuel, since the compression ratio is fixed by the engine design. – wikipedia

The AKI (anti-knock index — also known as “octane rating”) of the fuel is an average of two different methods of computing the fuel’s ability to resist engine knock. Regular unleaded gas in the U.S. has an anti-knock index of 87, while mid-grade is usually 89, and premium typically is 91 – 93. The higher the number, the more anti-knock protection the fuel offers.

Engine knock occurs when the fuel in the cylinder ignites by itself before the spark plug ignites it. The technical name for this condition is “pre-ignition.” It sounds like marbles rattling around in a can, and it generally gets worse the harder you press on the accelerator pedal.

Knocking can indeed damage an engine because what is in effect happening is the “explosion” of the fuel/air mixture is trying to push the piston downward in the cylinder before it’s gotten to the top of its stroke and is free to move downward. The engine is actually working against itself to a degree, and there is a lot of mechanical stress placed on certain engine parts, such as the pistons. In extreme cases, knocking can burn holes in the pistons and create other forms of engine damage.

Oil companies sell higher AKI fuels (also known as premium) to address this problem. A fuel with a higher AKI actually burns more SLOWLY than fuel with a lower AKI. This is because the fuel is less volatile and requires more heat input before it begins to ignite.

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Porsche 944 or not, this is a great read. It is a two part how-to.

Personally I don’t have the time and have been researching a place to do the New Beetle. I have done this routine in the past but right now it just need doing. We have a ton of rail dust on top of the usually birds, trees, etc. A claybar is #1 on anyones list. If you’ve used one you know it will make your car a smooth as a baby’s butt!

Andrew gettin it done with the Porter Cable Random-Orbit Polisher

- Part 1 is here
- Part 1 is here

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