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      09-24-2012, 10:13 PM   #24

Drives: Alpine White E92 M3 DCT
Join Date: Sep 2012
Location: Redmond, WA

iTrader: (1)

Originally Posted by Detroit M3 View Post
The altitude of where you tried to achieve this plays a role in your results. If your m3 is not tuned I believe the car cuts off at 155mph. If you're tuned I think 185mph is the max and as for Ess I GUESS over 200mph
That is correct.
The physics, disregarding small factors like rolling resistance at top speed:
Assuming the following:
  • 340whp
  • 2.17m frontal area
  • 0.31m drag coefficient
  • 1.219kg air density
  • Optimal gearing
  • Flat surface
... you could achieve a theoretical 190.58mph.

If you have other figures you'd want me to throw in there, I'd be happy to do it. The math is really straight forward, I just coded a simple program to handle it for me to avoid manual-data entry.