How this can be ? Audi S1

Looks like FWD instead AWD

 

Because it's a FWD-based AWD system known as Haldex. Basically it's FWD and the rears only kick in when needed.



https://en.wikipedia.org/wiki/Quattro_(four-wheel-drive_system)#Haldex

 

Thats right but on real haldex cars, I doubt you'll see the front wheel spinning like that before the rear starts getting power. On mine I cant get the front tires to spin much before the rear kicks in.

 

I read a little about Haldex. I think we have Haldex V ? or newer. So its active Haldex system. With full throttle before launch, i think electronics must turn on AWD to prevent front wheels spining so much at start. Even with non-active old Haldex front wheels make around only quarter turn or so before AWD is turned on. In AC i can burnout several meters with FWD (default setup, optimum grip, track temp ~7C)

Sorry for my english

P.S. Yes its very different car, but use Haldex too
Its looks like Haldex in AC don't work so fast how must to be. Or i'm wrong ?
And both car with default setup (AC settings - factory), this mean TC is ON

 

Well it's a picture so we don't really know how much the wheels spun, just that they spun some.

 

Ok. Here is the video

 

Real world example, fronts start spinning first and are spinning faster even after the rears kick in. Not to the extent that digitizer is showing from the game, but not too far off either.



Eh, it's a game, not everything is going to be perfect. Long story short, buy a Subaru.

 

As the video is slowed down by x6, I'm guessing the wheel only slips for about half a second which doesn't seem like a long time to me. The extremely low temp might affect things too.

 

Ok, thanks, i don’t worry any more about this in game Looks like its how should be

P.S. i used to own Legacy ‘91

 

Fam!!

 

That doesn't look too good. You can't feel the front spinning even with 1st Gen Haldex.

 

The rears taking so long to spin up from standstill could be an issue caused by low-speed physics. Try by dropping the clutch in first gear while going reverse on a low friction surface. You'll see the tyres spin up much more like IRL. While transitioning from going backwards to going forwards, at very low speeds the rear tyres stop spinning, just to spin back up again once you gain a few kphs. Or you can try dropping the clutch in first while going like at least 10 kph or so forward. Both front and rear tyres will spin up almost simultaneously like they should.

 

^ Winner

 

Some more test as DuckeyTapey has recommended. Looks like it worked in one direction (while change from 1th to R gear) and don't in other

 

I did the test while reversing at higher speeds, like above 40 kph. Not sure why it doesn't spin up the rear at 20 kph like you tried.

I guess low-speed physics might only be part of the reason for this. The other being that this is as close as it gets to simulating Haldex with the AWD code in AC.

 

Little did I know that I would come to this thread and learn a heck of a lot. Had never heard of the Haldex system before...that's super interesting how that works.

 

TC also turns off below a fixed speed, maybe AWD transfer functions too. In RL it's because the wheel speed sensors can't say anything until the wheel's turned far enough (eg. if the wheel sends a signal once per rotation, it'll take a few revolutions to calculate actual speed). Or if the difference calculation is mechanical, it's more likely to respond to difference in speed than a ratio - so it might calculate that at 10km/h difference it should lock the diff.

 

Thread revival.

Has anyone messed around with fine tuning or adjusting the behavior of this. Asking for the sake of the GR yaris and GR corolla which are being simulated rather poorly as of recent.