[Lorenfb]

"The fact that the engine will continue to run when you disconnect the reference sensor might not cause an issue during idle. But I wouldn't take the engine through the rev ranges if I were you....."

Really, kinda short sighted, right? This has been a know fact for the last 15+ years to many who have
troubleshot both the BMW & 911 3.2. Only when the speed sensor is weak, sensitive to noise, or the ring
gear is bad, there'll be a problem. Those that have another view point have not worked extensively
on problematic BMWs & 911 3.2s in the field to test this or don't fully understand the earlier DMEs.

Bottom line: Try it, you may learn something that'll help you troubleshoot in the future.