A while ago, Motor Trend held a comparison between a 2013 Chevrolet Corvette ZR1 (with the ZR1 High Performance Package) and a 2013 SRT Viper GTS (full post: 2013 Chevrolet Corvette ZR1 vs 2013 SRT Viper GTS ). The soon-to-be out of production Corvette ZR1 didn't only beat the new SRT Viper GTS, but it also took the title of the fastest production car on Laguna Seca - yes, the outgoing ZR1 broke the lap time record for production cars around Laguna Seca. To make matters worse for the SRT team, the last record holder was a Dodge Viper SRT10 ACR. Ralph Gilles, the president and CEO of SRT, wasn't happy to say the least. Enter the SRT Viper Time Attack - a more hardcore track-ready version of the new SRT Viper (although not as hardcore as an ACR which is still in the works). The Viper TA uses lightweight matte-black Sidewinder II wheels wrapped in sticky R-compound goodness - Pirelli P Zero Corsa tires. They then dial in "significant negative camber" at all 4 cor...
I've been a huge fan of Michelin PSS tires and exclusively bought them for the Mustang over the last four years. So how did I end up here? This year, I was hugely interested in trying an "R-comp" tire. I had my eyes set on Bridgestone Potenza RE-71R's for two simple reasons: price and reputation. Although not a true "R-comp" tire on paper, it performs like one by the account of every single test and review I've read (down to wear rates...). They seem like they're easily the most affordable (from a big brand) R-comp tire and combine that with a reputation for having tons of grip, it was an easy top contender. I had my concerns, though. For one, I'm told and have read that they are an autox tire, not really designed for high speed, pressure, and temps associated with open track. For another, the Mustang is a heavy car (as far as track cars are concerned) being roughly 3,800 lb. (including driver), which will amplify the unwanted open track load...







