Como fazer um Nissan Leaf ficar tão bom de curva quanto um Porsche 911 Carrera S?


Em matéria de performance, o Nissan Leaf é o último carro a ser lembrado. No entanto, o pessoal da Car And Driver resolveu tentar fazer o carro movido à pilha ter o mesmo grip que o Porsche 911 Carrera S.

Para isso, eles instalaram vários tipos de pneus no "folhinha" e o colocaram no skidpad para ver como ele se sairia.

Este vídeo vale a pena ser visto apenas para conhecer um pouco mais sobre... pneus.
BRIDGESTONE ECOPIA EP422 Automotive Equivalent: Nissan Leaf Roadholding: 0.79 g Price*: $107 Test Notes: The Leaf’s stock Bridgestone Ecopia EP422 is a low-rolling-resistance tire designed to maximize the car’s driving range. Grip is low on its priority list, but the Ecopia does provide a quiet and comfortable ride. Unlike a summer tire, the Ecopia can be used all year, even in light snow. It’s essentially the tire equivalent of the Leaf: mild mannered, sensible, and eco friendly, with no real performance or handling aspirations. Around the skidpad, the Ecopias howled in protest but managed a respectable and easy-to-achieve 0.79 g. YOKOHAMA AVID ASCEND Automotive Equivalent: Nissan Leaf Roadholding: 0.82 g Price*: $128 Test Notes: This test’s first encounter with the Yokohama family was the new Avid Ascend, a direct replacement for the Leaf’s stock rubber. Like the original-equipment Bridgestone, this Yoko is a low-rolling-resistance tire from the grand-touring all-season segment. We didn’t test the Avid Ascends’ effect on the Leaf’s range, but on half-inch-wider wheels, we did find that they increased skidpad grip over the stock tires. The Avid Ascends also have a higher treadwear rating and greater tread depth than the stock rubber. While they have more grip and the potential for longer life, they do cost a bit more than the stock Bridgestones. YOKOHAMA S.DRIVE Automotive Equivalent: Volkswagen GTI Roadholding: 0.84 g Price*: $98 Test Notes: Yokohama’s S.drive is what Tire Rack categorizes as an ultra-high-performance (UHP) summer tire. Like all summer tires, it’s really more of a three-season tire, functioning in almost all conditions except snow. The UHP label means the tire is designed for both wet and dry grip as well as high-speed stability and handling performance. Tread life is a consideration, as UHP tires are meant to last longer than the next-highest rung of summer performance tires. The S.drives enlivened the Leaf’s steering and woke up the handling response. The least-expensive tires in this test squealed around the skidpad but increased grip. YOKOHAMA ADVAN NEOVA AD08 Automotive Equivalent: Chevrolet Corvette Z06 Roadholding: 0.89 g Price*: $155 Test Notes: Jumping to the extreme-performance category brings an emphasis on dry grip while giving up a lot of wet stick and tread life. The Advan Neova AD08 has meaty tread blocks typical of the extreme category, but the tread pattern and rubber compound keep this tire usable everyday. The amazingly grippy AD08s matched the skidpad figure of Yokohama’s own A048, a tire classified as track/competition rubber. The AD08s further sharpened the Leaf’s responses and were eerily quiet as they stuck to the skidpad at 0.89 g. Better yet, the AD08s break away more gradually than the two other track-oriented tires we tested. YOKOHAMA ADVAN A048 Automotive Equivalent: Lotus Exige Cup 260 Roadholding: 0.89 g Price*: $233 Test Notes: Above extreme on the performance ladder are what Tire Rack calls track and competition tires. They are often DOT approved (street legal) but primarily intended for racetracks and autocross courses. Tread life, noise, ride comfort, and wet-weather capability are all sacrificed at the altar of dry grip. Track tires’ major advantage over street tires is that they maintain maximum grip during sustained hard cornering despite the resulting elevated tread temps. The AD08s might have hit the same skidpad number as the A048s, but the lower-priced tires’ tread was beginning to peel away in small chunks, while the A048s showed no signs of distress. BFGOODRICH G-FORCE R1 Automotive Equivalent: Playboy Mazda MX-5 Cup race car Roadholding: 0.96–0.97 g Price*: $203 Test Notes: A barely disguised racing slick, the R1 sneaks by the DOT by virtue of two shallow grooves in its tread. It’s technically legal but not a tire we’d use on the street. The R1 is a hothouse flower: It demands quite a bit of heat to generate maximum hold, has no interest in gripping a wet surface, and isn’t even supposed to be stored below 32 degrees Fahrenheit. But a warm set of R1s transforms the Leaf into a corner-devouring track weapon at 0.96 g. In a last-ditch lunge for the 1.0-g mark, we took the doors off the car, further lowering its center of gravity. We almost fell out, but the weight loss helped us hit 0.97 g. * Each, from tirerack.com; shipping not included.
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Publicado: quinta-feira, 13 de setembro de 2012 às 21:07
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