Per you have to realize one thing when comparing a turbo 335 to a supercharged M3 they are very different in power delivery for starters ,
300 to 800 rpm can net you 60 to 120 whp (ballpark) between shifts where as the turbo will net you 20 40whp .
The other factor is gearing
take a look what i have to do to pass forum member ERM ( ricky ) on our way to ATCO
[u2b]http://www.youtube.com/watch?v=srJKTVfCbnQ&hd=1/U2B]