New Magna rear Diff.

Interesting article on the new rear Diff.



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"In the RS3’s case, the MVDC not only synchronises the two Torque Splitter control units but also the adaptive dampers and the individual torque control to the wheels."

Just noticed the above statement. So what if you don't have the adaptive dampers?
 
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"In the RS3’s case, the MVDC not only synchronises the two Torque Splitter control units but also the adaptive dampers and the individual torque control to the wheels."

Just noticed the above statement. So what if you don't have the adaptive dampers?
Then it's just one less thing for it to adjust.
 
"In the RS3’s case, the MVDC not only synchronises the two Torque Splitter control units but also the adaptive dampers and the individual torque control to the wheels."

Just noticed the above statement. So what if you don't have the adaptive dampers?
I changed from a launch edition fully loaded TTS to a TTRS without the adaptive dampers, not a great deal of difference in ride quality but start to push on fairly hard and the TTRS would dive more under brakes, roll more in the corners and generally not have the body control of the adaptive damper cars, a lot used to think in normal mode the adaptive dampers were 'off' that is not the case and the effect of them stiffening up for body control was more noticeable than in 'Sport Mode'
 
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"In the RS3’s case, the MVDC not only synchronises the two Torque Splitter control units but also the adaptive dampers and the individual torque control to the wheels."

Just noticed the above statement. So what if you don't have the adaptive dampers?
I think if you don't have adaptive suspension; rs torque rear, rs individual and rs performance modes won't be available on the driver select.

Could be wrong but that's what it seems to imply on the configurator when you spec the DCC option
 
I think if you don't have adaptive suspension; rs torque rear, rs individual and rs performance modes won't be available on the driver select.

Could be wrong but that's what it seems to imply on the configurator when you spec the DCC option
I really hope that's not the case.
 
I really hope that's not the case.
Might be worth checking with your dealer....the wording here seems to imply these are extra driving modes.

I managed to add mine luckily
 

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Might be worth checking with your dealer....the wording here seems to imply these are extra driving modes.

I managed to add mine luckily
Yeah it's a bit contradictory as this is the wording in standard car spec.

"- Audi Drive Select – changes your car’s handling and response at the touch of a button to suit the way you want to drive. Enables the driver to alter the engine or gear-shift characteristics, quattro drive system, exhaust flap control and steering feel between three pre-set modes: ‘Comfort’, ‘Auto’ and ‘Dynamic’ mode. There is also 3 addional RS-specific modes: 'RS Individual', 'RS Performance' and 'RS Torque rear'. "
 
Might be worth checking with your dealer....the wording here seems to imply these are extra driving modes.

I managed to add mine luckily
Just use the configurator, pick a std car, dont add anything and print off the PDF, it will show:
Safety & technology 2H6 Audi drive select
I emailed them numerous times about this as even with the Vorsprung it seemed to imply the adaptive suspension only came with the £5K cermaic brake kit, it's very missleading :)
 
Interesting article on the new rear Diff.



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Not 100% sure I believe that, how does it reduce torque sent to the front? As far as I am aware the basics says it can split torque 50/50 and the 50% going to the rear can be sent to one of the rear wheels, the only way it could reduce the front torque is by brake vectoring?

Audi has taken a different approach. Undisturbed, its system has a 50:50 torque split front to rear; and when more torque is needed at the rear for drifting, torque to the front is reduced.
 
Not 100% sure I believe that, how does it reduce torque sent to the front? As far as I am aware the basics says it can split torque 50/50 and the 50% going to the rear can be sent to one of the rear wheels, the only way it could reduce the front torque is by brake vectoring?

Audi has taken a different approach. Undisturbed, its system has a 50:50 torque split front to rear; and when more torque is needed at the rear for drifting, torque to the front is reduced.

Just info, worth a read regardless.


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Here’s a link to Audi’s own info-vid: [link]
And one to their press sheet: [Link]

Audi have always been very vague in their description of how the Haldex implementation works on their cars, however there is no clutch mentioned which would be needed to send more than 50% of the engine power to the rear. They only ever talk about available torque, which is obfuscation in my opinion.

I am sure the new rear differential will make a big difference, but it isn’t magic :friendly wink:
 
Here’s a link to Audi’s own info-vid: [link]
And one to their press sheet: [Link]

Audi have always been very vague in their description of how the Haldex implementation works on their cars, however there is no clutch mentioned which would be needed to send more than 50% of the engine power to the rear. They only ever talk about available torque, which is obfuscation in my opinion.

I am sure the new rear differential will make a big difference, but it isn’t magic :friendly wink:
Well it absolutely kills the understeer on a Golf 8 R, something that nothing else has really been able to do 100%. I pushed the Golf 8 R very close to its limits and any full power exits from roundabouts etc resulted in the car just going exactly where it's pointed, no more running out of road with understeer and having to lift off, if anything when close to the limits it's between a 4 wheel drift and a touch of oversteer....................magic :)
 
So just to confirm? If you don’t have the adaptive suspension you still have the additional 3 RS specific modes regardless???
 
Yes, including Individual for everything else except suspension.
 
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Here’s a link to Audi’s own info-vid: [link]
And one to their press sheet: [Link]

Audi have always been very vague in their description of how the Haldex implementation works on their cars, however there is no clutch mentioned which would be needed to send more than 50% of the engine power to the rear. They only ever talk about available torque, which is obfuscation in my opinion.

I am sure the new rear differential will make a big difference, but it isn’t magic :friendly wink:
Watched Auto Mundial on ITV4 and they tested the RS3 saloon. They stated the torque is sent to left or rear wheel, apart from that is the Haldex just the same as previous versions ??
 
Watched Auto Mundial on ITV4 and they tested the RS3 saloon. They stated the torque is sent to left or rear wheel, apart from that is the Haldex just the same as previous versions ??

It’s not made by Haldex now.

The diff is totally new and made by Magna.


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Original Halex is basically a wet clutch pack built into input to rear differential (propshaft, Carden shaft) when locked to 100% it splits the cars torque 50/50 front and rear with no option to send it just one rear wheel, sometimes brake vectoring is added to brake one rear wheel to assist with ESC.

New Magna differential is connected to prophaft all the time and has two wet clutches, one on each driveshaft to each rear wheel, it therefore can send a different percentage of torque to either rear wheel, effectively pushing the car around a corner, or helping with ESC, of course it cab also send all of its torqe to just one rear wheel to do 'fake' skids as Chris Harris called them, or you could call it terminal oversteer
 
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In so much as it can’t cut power from the front wheels
Yes thats it downfall tbh, I also maybe mistakenly called the Magna a 'Differential' that is not true in the normal sense of a differential which has a set of differential gears within the crownwheel arangement, the Magna unit does the 'differential' bit with the two clutch packs on it's output's to the rear driveshafts
 
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That’s what I love about this forum, every day is an educational one. Cheers gents.
 
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