I had the experience of swapping my 998s for a 999s for a lap of the 'Ring recently and can vouch for the "won't read higher than 174" bo**ocks........was flat on the tank all the way from last corner till panic (and I mean panic) braking at "pit" entrance......was a good drag against a 911GT3 I happened to come out of the corner alongside, left 'im for dead.........just hope Simon (owner) isn't reading this thread!!!!!