f1eng
Well-Known Member
- First Name
- Frank
- Joined
- Aug 19, 2021
- Threads
- 40
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- 3,679
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- Location
- Oxfordshire, UK
- Vehicles
- Taycan CT4S, Ferrari 355, Merc 500E, Prius PHV
IME there are things "outside" the car which have such a big influence on powerful cars the whole debate is a bit bonkers.It cannot be based on measurements made under different conditions.
Car and Driver tested them in the same conditions : 3.1 vs 3.4.
Porsche confirms : 3.5 vs 3.8.
So if we want to be precise, it is therefore exactly 0.3.
In 1993 Michael Schumacher lost a lot of places at the start of every Grand Prix which negated his good qualifying, it was pre-DRS and overtaking was rare outside pit strategy.
I was Chief Engineer at Benetton at the time and decided we would practice starts every time we did a pit exit through winter testing for 1994 - there was also a lot of track testing back then, unlike now, but fewer races.
The main thing there was him getting used to the temperature sensitive friction coefficient of the small composite clutch but we also found very big differences just stopping on a different bit of road surface, with tyre prep, type and temperature.
If a car has enough power to brake traction keeping the wheel over-rotation near optimum for the entire grip-limited time makes a big difference.
I don't know at what point the power is no longer enough to spin the wheels between 0 and 60 but up to that point the tyre/road surface is the limit as much as the car.
I have never seen a journalistic source, whether written or on a video done by anybody who knows this, so they are all just entertainment not serious technical evaluations IMO and IME.
I could almost certainly formulate a test where a 4S out accelerated a turbo up to 60mph.
I see speculation that the RWD has its power deliberately held back and I am sure it is seriously held back by the PSM software because it has so much less traction grip than 4WD initially.
I wonder how far any Taycan goes in the 0-60 sprint before the PSM is allowing full power...
Has anybody tried doing an entirely driver skill 0-60 with PSM off?
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