But i can see that the PI ratings dont mean all that much, as i went and done a bit of a test using the second group on the top gear lap times list, couldnt use the Zonda F though as it isnt on there.
Veyron - S700 - 52.312
MC12 - S663 - 50.925
Enzo - R3 721 - 51.484
LP670 SV - S648 - 52.205
So although the MC12 isnt the highest PI it won, knowing the MC12 is based on the Enzo if i remember rightly, why is the Enzo classed as an R3 car, when other competitors are in S. It makes no real sense.
T10 have said how they get the base PI rating, taking AI drivers around an imaginary course that has lots of different bits of each track (or something like that).. so comparing on 1 track is going to show differences.. put a Veyron on Le Sarthe, and surely with the humungous straights, it'd be much quicker..
I think people are expecting too much from a single PI number, without even turning a wheel in FM3, just going by how it's calculated you can immediately list a whole set of situations under which it doesn't show the real performance on any one given track/situation..
To be perfect, you would have to assess each car with every permutation of 'component' using some AI and real drivers on every course over a wide range of race distances, and Have a PI rating for every car/track/race/upgrade combination..
Or does anyone have a better idea?