PCM Diagnostics & Tuning - DBW speed limiter

I just swapped out an aftermarket VSS (Dakota Digital, about 2 pulse/rev) with a 39 tooth reluctor on an 04 L59 and have not retuned the ecu yet.
The increase reluctor count is giving a higher speed reading, it maxes out at 158mph while I'm driving about 20mph. At about 30mph the DBW TB seems to quit responding. Initially I thought I broke something, but then the light bulb went on....speed limiter.
What is the set point of the speed limiter? How does it work on a DBW TB? Do cable driven TB cars have a speed limiter?

No idea what pcm calibration you are using. Yes there is a speed limiter on dbw and dbc.

On the dbw, it feels like the tb stops responding to the pedal. Any idea on hoe the cable tb cars limit speed?

They kill fuel