So here is the Overspeed data on the 991 I am looking at. I am not educated on these reports, but I do know it is important to have total operating hours included. They did not send that, and I have emailed back and asked. At first glance, I am guessing this is an average at best report (no 5's or higher), but would greatly appreciate the experience of the board in reviewing the data below;


Overspeed range 1: Number of ignitions 908
Overspeed range 1: Operating hours 450.10 h
Overspeed range 2: Number of ignitions 41
Overspeed range 2: Operating hours 69.35 h
Overspeed range 3: Number of ignitions 47
Overspeed range 3: Operating hours 69.35 h
Overspeed range 4: Number of ignitions 30
Overspeed range 4: Operating hours 69.35 h
Overspeed range 5: Number of ignitions 0
Overspeed range 5: Operating hours 0.00 h
Overspeed range 6: Number of ignitions 0
Overspeed range 6: Operating hours 0.00 h

 

Nothing to be concerned about on that report. Looks like the car was seldom pushed very hard and that maybe there was a test drive around the 10 to 11,000 mile mark.

Range 1 thru 3 are not a problem for a Porsche. Range 4 thru 6 can be a problem for warranty work.

The number of ignitions in any range should be divided by the number of cylinders to determine the number of over rev RPMs in those ranges.