According to my G-Tech Comp and an (assumed) weight of 3888lb, I managed a 15.6 @ 92mph in my Jim Conforti-chipped '93 535im.
The damn speed graph shows the near-half-second lag in my 1-2 shift, too. ****ing slow synchros..
Keep in mind this is all very much dependent on the weight I entered being accurate - and I am (was) only going off what the supposed curb weight is, plus the weight of me and my friend in the car. If I could get the thing on an accurate scale, I could get a better measurement.