I bought an NSX earlier this year after some research
http://www.noelwatson.com/blog/PermaLink,guid,682dda25-accd-4deb-8df4-2b677dae5164.aspx
was wondering how fast it would go. Unfortunately with the speed limit in the UK being 70mph, getting to the top end of 2nd gear would see me breaking the law - let alone the 4 gears above this.
http://www.nsxprime.com/FAQ/Technical/gearratios.htm
Fortunately, Pistonheads organised a day at Bruntingthorpe
http://www.bruntingthorpe.com/
http://maps.google.co.uk/maps?f=q&hl=en&geocode=&q=bruntingthorpe&sll=54.162434,-3.647461&sspn=12.342065,38.188477&ie=UTF8&ll=52.490463,-1.134768&spn=0.025033,0.074587&t=h&z=14&iwloc=addr&om=1
which has a 2 mile runway enabling drivers to get near to their vehicle's top speed. Unfortunately in the morning it had been raining, so the braking zone distance had to be increased, meaning that the speeds achieved were not what they could be. My best speed was 156mph - near the limiter in 5th gear (see picture)
After lunch the track had dried out meaning that the braking distances could be reduced. The car hit the limiter at around 160 meaning that a change into 6th was required. Acceleration at these speeds was limited meaning that the best I could manage was 161 mph - a record for an NSX at Bruntingthorpe but slower than an M3 - my target. Full results can be seen here
http://www.pistonheads.co.uk/gassing/topic.asp?h=0&t=428585