So, are the C5 RS6 and B7 RS4 AWD systems basically "Quattro V"?

Minimization · 02-23-2005, 09:53 AM

I keep hearing that they are quite different than our Quattro IV system.

ryans4 · 02-23-2005, 10:25 AM

...which has a locking type feature. Basically as far as I understand it, the Type C Torsen allows for a static torque split to be set, where as our Torsen's (Type A I believe) you cannot specify a torque split, it will go where it deems necessary within a range determined by the Torque Bias Ratio.

Pretty bad ass if that's the case. It'll mean that Audi can set a static no-traction torque split of like 30/70 F/R, though they may wuss out like always and do a 60/40 split static.

But I like where they're going with it. According the B7 RS4 release, this is the first they've used the new Torsen in, so I think the RS6 unit is what you'd find in the 4.2 A6.

Funkweasel · 02-23-2005, 10:30 AM

Oo.et.oO · 02-23-2005, 10:46 AM

Oo.et.oO · 02-23-2005, 10:47 AM

Funkweasel · 02-23-2005, 10:54 AM

have to see.

ryans4 · 02-23-2005, 10:56 AM

...The B5 S4 which was essentially the first 6 speed box uses a unique Torsen.

I say unique becuase when the next 6 speed box came out (used for the 1.8t Longitudinal and the B6 S4) the Torsen changed.

Still the same design, but they moved one of the splines to the outside of the housing (not sure why, seems like a better, but more expensive design).

You can't put a B5 S4 6 speed Torsen into a B6 S4 6 speed transmission and vice/versa. Lame, but reality.

Now you've got this potential shift to a Type C Torsen. This will in all liklihood have no chance in hell of dropping in a B5 6 speed box. Best chance is that the entire B7 RS4 tranny will meet the B5 2.7t motor. Good news there is that Audi has kept that bell housing to motor connection pretty much the same since like a million years ago.

Type A (us):

Type C (bad ass):

Of course, I could be wrong, but from the sound of it, this is what Audi is doing, and I applaud them for that. Now they have an easy (relative) way to set static torque split between performance and general model variations.

ryans4 · 02-23-2005, 10:57 AM

Oo.et.oO · 02-23-2005, 11:07 AM

Hal_TT::CBP · 02-23-2005, 11:27 AM

02-23-2005, 09:53 AM	#1
Minimization AudiWorld Senior Member Account #: 11147 Join Date: Oct 2000 Posts: 1,584	So, are the C5 RS6 and B7 RS4 AWD systems basically "Quattro V"? I keep hearing that they are quite different than our Quattro IV system. __________________ South Boston, MA, USA 2000 Audi S4 2.7 T Quattro Light Silver Metallic/Onyx/Bird's Eye Maple/MT6 PP/CWP/BPSS/6DCDC APR Stage II+ with BiPipe Kit and Engine Snub Mount 91/93/100/104 octane EMCS, Samco Sport Si f hose 8.5J x 19H2 BBS CH with 235/35YR-19 BFGoodrich g-force T/A KDW-2 7.5J x 17H2 Ronal Avus with 225/45VR-17 Continental ContiWinterContact TS810 XL UUC Motorwerks USS 30% and RK II brushed Al Oettinger 4-piece Al pedal set Bailey Motorsport DV30 polished full SPP Stage III lighting and RS4 Grill hard-wired Valentine 1 Remote

02-23-2005, 10:25 AM	#2
ryans4 Senior Member Account #: 4359 Join Date: Apr 2000 Posts: 7,314	It looks like in the case of the B7 RS4 they are going to a Type C Torsen... ...which has a locking type feature. Basically as far as I understand it, the Type C Torsen allows for a static torque split to be set, where as our Torsen's (Type A I believe) you cannot specify a torque split, it will go where it deems necessary within a range determined by the Torque Bias Ratio. Pretty bad ass if that's the case. It'll mean that Audi can set a static no-traction torque split of like 30/70 F/R, though they may wuss out like always and do a 60/40 split static. But I like where they're going with it. According the B7 RS4 release, this is the first they've used the new Torsen in, so I think the RS6 unit is what you'd find in the 4.2 A6. __________________

02-23-2005, 10:30 AM	#3
Funkweasel AudiWorld Super User Account #: 28517 Join Date: Nov 2001 Posts: 10,145	Of course you know the next question I want to ask....

02-23-2005, 10:46 AM	#4
Oo.et.oO Member Account #: 65580 Join Date: Nov 2003 Posts: 5,879	the parts of course are not available yet. i've been asking around. :-) __________________ For Sale: B5 A4/S4 avant boot/trunk rubber mat Gone but not forgotten: 2001 Brilliant Black S4 Avant 6spd. c'mon AoA, where is the B8 3.0 TDi?

02-23-2005, 10:47 AM	#5
Oo.et.oO Member Account #: 65580 Join Date: Nov 2003 Posts: 5,879	...or maybe the answer to the question you are hinting at is: "TREE" __________________ For Sale: B5 A4/S4 avant boot/trunk rubber mat Gone but not forgotten: 2001 Brilliant Black S4 Avant 6spd. c'mon AoA, where is the B8 3.0 TDi?

02-23-2005, 10:54 AM	#6
Funkweasel AudiWorld Super User Account #: 28517 Join Date: Nov 2001 Posts: 10,145	Nice. I wonder if the form factor of that torsen is even the same though. We'll just have to see.

02-23-2005, 10:56 AM	#7
ryans4 Senior Member Account #: 4359 Join Date: Apr 2000 Posts: 7,314	I'm already ahead of you, so here is what I know... ...The B5 S4 which was essentially the first 6 speed box uses a unique Torsen. I say unique becuase when the next 6 speed box came out (used for the 1.8t Longitudinal and the B6 S4) the Torsen changed. Still the same design, but they moved one of the splines to the outside of the housing (not sure why, seems like a better, but more expensive design). You can't put a B5 S4 6 speed Torsen into a B6 S4 6 speed transmission and vice/versa. Lame, but reality. Now you've got this potential shift to a Type C Torsen. This will in all liklihood have no chance in hell of dropping in a B5 6 speed box. Best chance is that the entire B7 RS4 tranny will meet the B5 2.7t motor. Good news there is that Audi has kept that bell housing to motor connection pretty much the same since like a million years ago. Type A (us): Type C (bad ass): Of course, I could be wrong, but from the sound of it, this is what Audi is doing, and I applaud them for that. Now they have an easy (relative) way to set static torque split between performance and general model variations. __________________

02-23-2005, 10:57 AM	#8
ryans4 Senior Member Account #: 4359 Join Date: Apr 2000 Posts: 7,314	see above... __________________

02-23-2005, 11:07 AM	#9
Oo.et.oO Member Account #: 65580 Join Date: Nov 2003 Posts: 5,879	the first diagrams i understand. but the second may as well be this: __________________ For Sale: B5 A4/S4 avant boot/trunk rubber mat Gone but not forgotten: 2001 Brilliant Black S4 Avant 6spd. c'mon AoA, where is the B8 3.0 TDi?

02-23-2005, 11:27 AM	#10
Hal_TT::CBP Senior Member Account #: 3027 Join Date: Mar 2000 Posts: 9,679	Thx for the data Ryan(as usual). Thought the B6 had Q-IV like us. __________________ Hal. Whoops... I wanna ride... APR Stg3 (and then some) Sold.

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