Lingenfelter Sierra C3 6.0L SC

Traction is a huge concern every time horsepower guru John Lingenfelter drops by with a hopped-up car. For one thing, he knows we don't allow drag-racing slicks. Instead, we insist on running all our tests on less-sticky street rubber, which makes the art of launching 500-hp Corvettes very much like performing an intricate tap dance when it comes to getting the throttle and clutch to work together just right. And even with a perfect launch, the tires can't handle a full-on throttle until about 30 mph, which means that although horsepower ultimately determines acceleration times, traction does indeed play a big role. More...