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      04-22-2014, 10:37 PM   #81
coloradoe92m3
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Drives: m3
Join Date: Mar 2014
Location: u.s

iTrader: (0)

Gearing :
E92 dct
Final-3.154
1-4.78
2-2.933
3-2.153
4-1.678
5-1.39
6-1.2
7-1.0

F80-
Final-3.46--9% shorter
1-4.8 --same-----9% shorter overall
2-2.593 14% taller------6% overall tall
3-1.7. 21% taller_------12% overall tall
4-1.27----25% taller---16% tall overall
5. 1.0-----29%_--------21% tall overall
6. .84-----30% taller----21% overall
7. 0.67...---32% taller----24% overall

So check my math but 1st bear choice is crazy. I can't use 1st in my e92 due to traction limitations so talk about hard to launch. F80 will be really tough to put power down in first. 2nd gear is going to be downright freight train. But e92 is quite a bit shorter gearing from 2nd on.

So you can't only compare dyno plot as gears are the other half. If someone wants to create a plot with gear ratio differences taken in to account, the f80 will be way faster but not quite as much as it has seemed thus far.

Keep in mind at WOT you don't see below 6500 ROMs in e92 dct so you can't draw a line straight up as they do as you need to account for e92 power band .

So love to see area under curve of each cars WOT power band with gearing taken into account
Appreciate 0