Unsurprisingly, a more track focused Viper ACR has been confirmed for production (Viper GTS-R shown). SRT CEO Ralph Gilles has previously hinted at a Viper ACR but a high-level at Chrysler has confirmed to Motor Trend that a faster snake is already under development. Apparently, the reason for the delay is not budget or technical difficulties facing the SRT team. Rather, it's a problem with the tires. The SRT team would like some of the sticky goodness wrapping the Corvette ZR1's wheels - the Michelin Pilot Sport Cup tires. However, Michelin wouldn't sell the tires to SRT. The Corvette team may have had something to do with it but that would be difficult to confirm. Either way, they are now pressing their supplier, Pirelli, to develop something comparable to the Pilot Sport Cup tires to be used on the Viper ACR. The development for the car and tires are expected to be done for the 2014 calendar year. Along with upgraded tires, the ACR should receive a bunch o
BMW M2 equipped with an eLSD - BMW © A few weeks ago, I posted about traditional clutch-type limited slip diffs (LSD's) and how they work. You can read about those in the previous post: How Limited Slip Diffs Make You Faster on Track . But as you might know or have learned from reading the article, they aren't without their faults, which means engineers are always working to get around those limitations. You may not be surprised to learn that something like the Ferrari 488 GTB doesn't use a traditional limited slip diff, but it's not limited to super cars, far from it. Cars like the Golf GTI, the Civic Type R, various Mustangs, Corvettes, and BMW M cars, and even the Lexus RC F and GS F, all avoid a traditional limited slip diff in favour of one of these technologies. To keep things simple, I'll focus on two wheel drive vehicles. The vast (vast) majority of principles apply to all and 4 wheel drive vehicles, but there are some subtle differences that I'll