My 99 has the iA supercharger on it.
Here is a video of me doing a burnout and I have 19x10.5 or11's I forget. on the rear.
I know I hit the rev limiter a few times but burning out like this in a boxster is not something I am accustomed to.
I've done a few 0-60's in my car and I get the low 5's I think my best was a 5.1 or so.
http://www.youtube.com/watch?v=_dWS3Rwtc4c