Quote:
Originally Posted by Be Stock
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?
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I simply read the speedo. Given the likelyhood of speedo error, you might be right.
Dave