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      04-03-2012, 12:53 PM   #79
dcstep
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Drives: '09 Cpe Silverstone FR 6MT
Join Date: Nov 2008
Location: Colorado

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2009 M3  [4.00]
Quote:
Originally Posted by Be Stock View Post
According to my calculations with OEM diameter rear tires and 4.10 FD in a 6MT E9x you will need to rev to about 9050rpm in 2nd to hit 72mph.

If you are running 275/35/18s and a 4.10 FD you will need about 9400 rpm to reach 72mph in 2nd gear.

How did you obtain these numbers?
I simply read the speedo. Given the likelyhood of speedo error, you might be right.

Dave
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