So...if the speedo on a S2000 says 170mph it's most likely only doing 165 at the best. I've gotten my Z3 1.9l (1.9!) to hit 125 on the speedo and it's still got room to pull...Now, don't tell me the Z3 1.9l can do 140! (which is what the speedo/odo was indicating at that speed). My guess is when the speedo actually says 125 on my Z3 it was actually only going ~ 110.