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Installed my license plates. They were supposed to go on my Ford Raptor but i sold it. It'll stay on the car for a couple weeks before removing them and i'll hang the plates as decoration in the garage
Installed my license plates. They were supposed to go on my Ford Raptor but i sold it. It'll stay on the car for a couple weeks before removing them and i'll hang the plates as decoration in the garage
Had an opportunity to get the car out in the snow and give the Michelin Alpins a bit of a go - phenomenal, best snow tire coupled with a very smart AWD system and the car was rock solid.
I am curious though - when in a slippery condition, does anyone know how drive torque is managed? The torque display shows how much to the front diff, but beyond that, does anyone know if it is being managed at each wheel as well? I found the car loosened up the further clockwise I turned the dial, but the torque display was pretty static.
I'd think it's a given that there'd be vectoring on the rear axle with a form of limited slip diff. I also recall a track review that mentioned that torque is not only vectored front to back but side to side which also seemed like a given to me. Have you looked up any Porsche published marketing info? Can't imagine this should be hard to confirm.
All PDK cars with PTV actually have PTV+ which is a variable differential lock that is controlled by the computer. This allows the diff to be completely open when traction is adequate, which helps with turn in and if the rear tires start to lose traction on one side the diff lock can progressively engage to limit the speed difference between the two rear wheels.
This is not a mechanical torque vectoring device which typically involves planetary gearsets to transfer torque from one wheel to the other, proactively sending power to the outside wheel and accelerating it faster than the inside wheel. In most cases when the diff lock is engaged enough torque is transferred away from the inside wheel to eliminate wheelspin. If the car is cornering especially hard, PTV will brake an inside wheel to cause the outside wheel to receive more torque and spin faster. This is less efficient than a torque vectoring diff but is a rare enough occurrence that Porsche has decided to go with a more mechanically simple route than Audi with their Sport Differential, largely because the cars need it much less.
Front diff is open and there is no vectoring afaik, but the standard PSM will eliminate wheelspin on the front axle by braking individual wheels, as on virtually any modern AWD car now that stability control is ubiquitous.
01-09-2020, 07:26 PM
