whats the fastest you been?
#32
Strong tailwind and down hill, perhaps? Porsche listed the top speed for 1999-2001 models as 175 MPH for stick and slightly lower for tip.
#34
Also, assume that there is at least 2% error in the speedo (which could go both ways). Porsche is also conservative with their performance figures. A GT2 will top 200, but they still list it at 197.
#35
145 in a SL63 AMG on the main track straightaway at Pocono Raceway at the 2008 AMG Challenge (factory-sponsored DE day for AMG owners -- M-B supplied the cars, track and instructors, including Tommy Kendall and Rick Andretti).