My first time I ran a 15.4. I only ran twice, but the second time, even with super wheel hop and an R/T of .989 I still managed a 15.1. To tell the truth it was kind of boring to me. It could of had something to do with losing to an RSX (14.5)...but autocross is much more fun. Have you tried that yet? BTW I have a slicktop too!