[Fasterthanyou]

Actually you don't "need" a black box to record the speeds and what not. All of that is stored in the pcm. The pcm uses lag filtered inputs for various mods, highway mode (open loop lean) needs to determine how long you've been above the threshold speed (like 50mph per say). So that's all in the memory with counters, etc. That's just for an old OBDI late 80's computer!!! Imagine the stuff stored in the newer ecms that have like 100x the memory and processing power.
If I wanted too I bet I could find exactly how fast any of you guys were driving the last couple minutes before a wreak. It would just take some hacking skills. I can only do it with the OBDI and the first few years of OBDII, the later years like 97 and newer I'm not familiar with. It's only a matter of time somebody hacks into one.