There were several vipers there. I believe treesnake was the fastest viper there with a speed around 190, but he could tell you exactly what the speed was. There was also a gen III that go up to 150. That's the fastest n/a GenIII we have had at any wannagofast event. Top speed of the weekend was a gtr at 214mph built by AMS. Closely followed by a eagle talon at 213. It was a great event for everyone. The wind caused a little issues on Saturday morning, but once the ball was rolling, we were running cars down the track every 45sec. Too soon to say if we will be back in Chicago, but I will make a post here when I get word to give everyone a heads up before they sell out. As a viper owner, I want vipers to take over and have as much participation as possible.