Differential

Hi all,
in AMS2 there're several options for setting up the differential. What do all the values mean exactly? Is there any description how to setup and use the differential?
Because there're many discussions about understeering but with setting up the diff right understeering can be eleminated (more or less).

@REIZA: is it possible to make a graphical illumination of the diff setting, for example for the stiffness? The same for setting up the gearbox. Only to see the values is hard. A small diagramm (like in AMS1) is very helpful

 

Theory is on page 96

 

that's a nice easter egg -
thank you.
No boring days anymore

 

The tooltips are there for some items but not all.

hopefully theyll find their way in!

 

Does anybody know what's the difference (in function, not in mechanic) between the geared LSD and the clutch LSD?
How to set up a geared LSD?

Is it really true that both can be used at the same time (like with formula classic G1), or is it a bug? I don't think so...

 

I found this very useful

 

The geared differential doesn't lock like a clutch pack differential - it just sends more torque to the wheel with more grip.

I think most of us are used to locking % - here are some equivalents

7:1 = 75%
6:1 = 71%
5:1 = 67%
4:1 = 60%
3.4:1 = 55%
3:1 = 50%
2.6:1 = 44%
2.3:1 = 39%
2:1 = 33%
1.8:1 = 29%
1.6:1 = 23%
1.5:1 = 20%
1.4:1 = 17%
1.3:1 = 13%

 

Do I understand from this video that in PC 2 you could equip your car with a completely unrealistic or unavailable diff just by toggling a few things in the set-up screen?

 

I'm not entirely sure what you are referring to so some detail may be needed (not that I think it matters for AMS2). But no, in general. So you don't have more diff options available for say a GT3 car than the real teams have... There may be a few areas in some of the vintage categories where the options are a little more open as there were less regulations during those times.

 

So the BMW in the video example could be equipped with one of 5 different diffs in real life? ....Don't think so....

 

I'm not sure the full regulations specifications are public, but I believe you can use any diff type you want in the series but the final drive ratio dictated. If you have a direct link to the exact specifications, please share.

 

Thanks for your helps
The technics are very interessting and I found it great that REIZA implements it (it's not a game, it's a simulation).

But the option in formula classic G1 that both geared and cluth LSD are useable is wrong, it doesn't make sense, or do I misunderstand something?

 

Just because a value might be present in the setup screen it doesn't mean you can change it if the series regs or the car don't allow it. Try making adjustments to the Fiat Uno, every value is present in the setup screen, but you can alter tyre pressure and fuel and very little else. The video explains what the diff settings do in the game, and PC2 has the tooltips that aren't present in AMS2 yet. OP was asking about diffs and that video explains what the values do. So no, you understand wrong in this instance.

 

Don't think so. In AMS, and I am sure in AMS 2 when it is further along, any equipment that is not in the car is greyed-out or missing or not available to play with (in a sandbox mode). The video shows the complete ability to install and adjust any type of diff. I am not aware of any BMW road car or race car that has those options. Maybe that is a special vehicle in PC 2 and was used in the video for that reason, but otherwise, if PC 2 allows that degree of customization, it is in a "sandbox" mode rather than a "sim" mode. Nothing wrong with that, if it's on purpose, but it sure makes for incredibly complex set-up combinations and permutations when even the limited realistic ones are already confounding to most people. Or, they just didn't grey-out or disable the options that do not actually work in PC 2, which you might expect in EA, but not in the finished product.

 

That particular car in that video was a GT3 car. The question is if the regulations mandate a single differential type or if it's open for that class. I know the final drive is specifically mandated (and you cannot change it in PC2) but I don't believe there are any mandates around what type of diff can be used.

However, this part of the discussion is really outside of the realm of AMS2.

 

Yes the difference is that a clutch type diff uses clutch plates on each output side of the unit and ramps will define how abruptly it will increase locking force with a difference in wheel speeds.

A geared diff is a "Torsen" type diff (like those made by Quaife and Wavetrac) and uses a bunch of bevel gears to achieve a similar objective. The biggest issue with a Torsen diff is that if one driven wheel becomes completely unloaded, as in off the ground for example, the locking effect of the diff will essentially be void. It will then function somewhat similar to an open diff.

You can indeed have both, however that would be a purpose built unit, not like one attached to the other.

If you jump on youtube and search wavetrac there is a good video that shows how their unit works, and there is a few other videos showing the difference between Torsen tight diffs and clutch type.

 

Thanks all, now, with a better setted LSD, it's much better to drive

 

limited slip diff is a really interesting topic and so I read much about the different systems.
But now the question:
When to use which LSD? All of them have their dis-/ advantages.
Which do Formula 1, Protoypes, StockCars, SportCars, StreetCars,..., use?
Does anybody know?