Grant:
nberry:

If your assertion is true that there is little difference between PDK and manual time wise, why do most race and track cars use PDK or like versions for racing?Smiley

Because in racing, a small difference is the difference between winning and losing.  0.3 sec per shift in racing would not be a small difference.  It would be an eternity!

Based on times recorded at the Leipzig track 0.3s per shift could be a correct estimate IF:

- the shifts are done at high speed (approx. 170kph in Leipzig)

- and: the car is not equipped with the GT3RS4.0/GT2RS gear-box (which reduces the delay relative to PDK substantially).

In Leipzig, we were able to calculate that 3 high-speed shifts on the 997GT2 Mk1 (i.e. not RS) reduced the lap time by approx. 0.9s per lap, i.e. 0.3s per shift. In a GT3RS 4.0 or GT2RS the disadvantage is probably closer to 0.1s per shift.