If they need to make the gearing like this for top end then they need to make a variable final drive ratio or something to switch between this ridiculous gearing and something useable.
Quote:
From March 7, 2012 Autocar review of the 991 Carrera (base, not S) with manual transmission:
1st 3.91/6.0 47mph 7800rpm
2nd 2.29/10.2 79mph 7800rpm
3rd 1.55/15.0 117mph 7800rpm
4th 1.30/17.9 140mph 7800rpm
5th 1.08/21.6 168mph 7800rpm
6th 0.88/26.5 180mph 6794rpm
7th 0.71/32.8 180mph(claimed) 5481rpm
Final drive ratio 3.44
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