Originally Posted by hyestein
there was a dude at the track doing mid 13s on a fully stock evo9. all the guy had done was removed the launch controller and was dropping it 6500. will u get a better launch if u just drop the clutch at 6500 or slip it at 4500 - 5000?
Mid-13s would be considered slow for a 9. If he was dumping his clutch at 6500, then he was making a big mistake. I'm not sure how he'd know how to disconnect the 5k limiter yet not know how to launch properly - that's a strange combination, since knowing about that switch usually means the person knows what they're doing. Anyway, stock 03s with about 40 less whp could do mid-to-low 13s, so a IX doing mid-13s is pretty weak unless it was at really high altitude or something.
No, you won't ever get a better launch if you drop the clutch. There is a clutch restrictor and a rubber clutch line, both of which causes engagement delays. You have to slip it a little out of the hole, and I prefer doing it around 5500rpm, which requires removal of the launch limiter. You can use the 5k limiter as a 2-step launch control, but it takes some practice.
PS. MRs aren't any faster, so that's not relevant to the track times.