Quote:
Originally Posted by swamp2
The reason is more simply because of the massive torque. The current car has a very broad power band with a very high percentage of peak torque across a wide swath of rpm, but its relatively low CRANK torque must be significantly gear multiplied to achieve a desired acceleration. A turbo car does not have that requirement and thus to have improved fuel efficiency will have numerically lower gears/final drive ratios.
NISFAN: As is typical with a final drive modifications one here for the M4 will help some performance contests and hurt others and when considering results say on a strip or track across a wide variety of gears overall it will be a wash. There is no such thing as a free lunch and altering a FD ratio simply does not give one a single speck more power and that is what matters.
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Not so fast....the old long gear ratio, but less gear change time wastage vs. time lost gear changing, but tighter gear multiplication groups doesn't work out so well in DCT land. The time a DCT changes gear in, is so much shorter that there isn't the pause in performance that counts against the general advantage of having smaller drops in torque multiplication......plus there is absolutely nothing sporty about being able to lap a track using only 2 maybe 3 gears, regardless of how fast it is, it is not good.
For info the M6 does 40mph in top gear, that is a theoretical 288mph geared speed. Tell me that wouldn't benefit from having a shorter gear set?
Furthermore anyone who supports the fact that turbo's provide significant lag, will also support that there are occasions, like coming out of a corner, where there isn't boost, and therefore torque to carry a long ratio......just teasing on this one
