So I noticed that the P1 has better score in Speed, Handling, Acceleration, and Braking. If P1 has better all stats, why is the Ford GT the same PI?
Weight, Power, and manufacturer tune?
Also, because cover car.
PI is calculated based on a hypothetical lap around a pre-designed track that Turn 10 uses for data representation. If a car can theoretically get around this imaginary track faster than another car, it has higher PI.
Google brings up this fan analysis:
PI is, as far as I can tell, a representation of how fast the car goes around an imaginary circuit. This is scaled into a value between 0 and 1, with arbitrary point values assigned to certain steps, for example 100 PI is 0.0, and 999 PI is 1.0. There’s an upper and lower limit to the laptimes, which is why you can get cars outside of the scale on both ends.
I don’t actually know if it does recalculate that laptime though, or when. Parts don’t have preset PI increases and decreases in the database, but it’s entirely possible they could in the code. I suspect it does a very quick and rough recalculation though.
As for driveshafts vs clutch and flywheel, driveshafts only change a tiny amount of inertia, while clutches improve shift times and flywheels make a bigger difference in inertia. For the 2000GT, the flywheel drops from 0.0927 stock to 0.0464 fully upgraded, while the driveshaft is from 0.0054 to 0.0038. For some reason inertia and shift times play a bigger part in the PI calculations than small amounts of weight, that’s one reason why autoupgrade favours flywheels so heavily.
For the race transmission, CJF is pretty much spot on. It has the exact same 6 forward ratios and final drive for every car (reverse remains stock), so cars that have longer gearing or diff ratios from the factory are hobbled. For example, the 2002 Camaro comes with a 3.42 diff and 0.50 6th gear from the factory, but the race box always has a 3.30 FDR and 0.85 6th. This drops the theoretical top speed from around 250mph to around 150mph. Cars that can pull gearing that long such as the Koenigseggs thus show a big penalty to top speed by fitting the shorter box.
The PI and rating systems completely ignore setups too, they assume the default settings for everything, which is why you get hits like that with adjustable parts, and why strange setups like the ‘rev banger’ Dart from early in the game’s life can push a car much faster than its PI indicates.
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PJTierney:
PI is calculated based on a hypothetical lap around a pre-designed track that Turn 10 uses for data representation. If a car can theoretically get around this imaginary track faster than another car, it has higher PI.
Google brings up this fan analysis:
PI is, as far as I can tell, a representation of how fast the car goes around an imaginary circuit. This is scaled into a value between 0 and 1, with arbitrary point values assigned to certain steps, for example 100 PI is 0.0, and 999 PI is 1.0. There’s an upper and lower limit to the laptimes, which is why you can get cars outside of the scale on both ends.
I don’t actually know if it does recalculate that laptime though, or when. Parts don’t have preset PI increases and decreases in the database, but it’s entirely possible they could in the code. I suspect it does a very quick and rough recalculation though.
As for driveshafts vs clutch and flywheel, driveshafts only change a tiny amount of inertia, while clutches improve shift times and flywheels make a bigger difference in inertia. For the 2000GT, the flywheel drops from 0.0927 stock to 0.0464 fully upgraded, while the driveshaft is from 0.0054 to 0.0038. For some reason inertia and shift times play a bigger part in the PI calculations than small amounts of weight, that’s one reason why autoupgrade favours flywheels so heavily.
For the race transmission, CJF is pretty much spot on. It has the exact same 6 forward ratios and final drive for every car (reverse remains stock), so cars that have longer gearing or diff ratios from the factory are hobbled. For example, the 2002 Camaro comes with a 3.42 diff and 0.50 6th gear from the factory, but the race box always has a 3.30 FDR and 0.85 6th. This drops the theoretical top speed from around 250mph to around 150mph. Cars that can pull gearing that long such as the Koenigseggs thus show a big penalty to top speed by fitting the shorter box.
The PI and rating systems completely ignore setups too, they assume the default settings for everything, which is why you get hits like that with adjustable parts, and why strange setups like the ‘rev banger’ Dart from early in the game’s life can push a car much faster than its PI indicates.
Even still if these are measured by going around a track, something is broken as the P1 should decimate it around a track.
My thoughts are it’s a cover car and has to look good
Am I missing something completely?
I assume you’re talking about the McLaren P1 and 2017 Ford GT?
The GT’s PI is 794 stock, the P1’s PI is 867 stock.
Unless you’re talking about upgraded versions? In that case, weight, aero (maybe), gearing, etc. all play into differences. A car with a higher PI might not necessarily be faster on a track than one that has maybe 10 PI less than it, and a car with, let’s just say 5.0 for all stats might be faster than one that has 5.2 for all its stats.
At the same time, equal PI =/= equal performance. Just look at the leaderboard cars for each class.
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im guessing they are the same pi due to auto upgrade…
