Some comparison to share, Guan's and my car.
Just did some runs so I dug out Guan's old files back in 2008, and compared to my recent timing.
Finally did a century sprint below 10 sec, and break it big time. As far as I remember, I did only two things since my last best run - removing the original mid-box, changed my plugs to Volker Iridium. Nothing else that's major. I have slashed 1.3 sec for 0-100km/h, from 10.9 sec to 9.6 sec.
In comparison to Guan's timing (9.9 sec) and data collected (see RPM chart), he still has lots of room for improvement for such a capable car.