And if you don't believe me ask wes. He was riding w/ me that night. Also I belive that your Z is not running up to full power. Have you dyno'ed? Because my current Z which is 100% stock right now (waiting on warranty work before I mod) runs DEAD EVEN with LS1 Z28's, SS Camaro's, TransAM's, and C5 Vettes. Still haven't raced one in this cooooold weather either... I think I could pull on a stock C5 Vette in this weather.