I used to have a 5 speed in my Mustang before converting it to an auto (C-4). I would do the same thing, keeping the gas to the floor. One night at the track I tried it but from third to forth, The clutch slipped REAL bad, since then I have not tried it. Have you ever had a problem with your clutch slipping at all? The fastest I have ever had my Z was a 12.5 granny shifting. If my clutch dosent slip, how much you think It could help my time with the Z? TIA