Not leaving hard enough. Called TCI tec line and they told me I needed to leave the line at at least 2,500 rpm. My converter won't do it. I installed a looser converter now so i'm hopeing for 1.6's 60' time which should bring me into 11.60s to 70's. I will post my new results. On the street with the new converter its nuts, a real tire shreader LOL.