[s-cars] V8 rear diff swapped to replace the front diff in a 6 speed trans?

[Theodore Chen]

speaking of center differentials and VC, i was surprised to learn that the R8 has a VC center diff.  torque split F/R varies from 15/85 to 30/70.  is that the first audi to come with a VC differential?  i wonder if audi just used the lamborghini gallardo drivetrain in the R8.

-teddy

----- Original Message ----
From: Joe Pizzimenti <joe.pizzimenti at gmail.com>
To: QSHIPQ at aol.com
Cc: s-car-list at audifans.com
Sent: Wednesday, February 6, 2008 8:50:56 AM
Subject: Re: [s-cars] V8 rear diff swapped to replace the front diff in a 6 speed trans?


There's 
a 
definite 
performance 
improvement 
over 
an 
open 
front 
diff...at
least 
on 
the 
Japanese 
toilets 
I 
drive.

Absolute 
night 
& 
day 
difference 
in 
front 
grip 
with 
a 
front 
Quaife
differential 
installed.

But 
then 
again, 
there's 
a 
VC 
in 
the 
center.

But 
then 
again, 
what 
do 
I 
know?

On 
Feb 
4, 
2008 
11:52 
PM, 
<QSHIPQ at aol.com> 
wrote:

>
> 
I 
was 
hoping 
I 
misunderstood.  
Since 
that's 
a 
78/22/78 
torsen 
he's
> 
installing, 
I'd 
sure 
be 
interested 
to 
know 
what 
a 
"much 
better 
result" 
is.
>  
 
If 
we 
take
> 
a 
look 
at 
all 
forms 
of 
Audisport 
racing, 
from 
Groupe 
B 
to 
touring  
car,
> 
very
> 
little 
documentation 
would 
support 
the 
statement.  
In 
Groupe 
B  
audi 
used
> 
either 
locked 
front 
(with 
locked 
center 
and 
rear), 
open 
front 
(with
>  
locked 
center
> 
and 
LSD 
rear), 
or 
20% 
LSD 
front 
with 
locked 
center 
and 
locked  
rear.
> 
Audisport 
gave 
the 
20% 
locker 
choice 
to 
the 
driver, 
and 
very 
few
>  
requested 
it.  
In
> 
BTCC, 
VC 
were 
used 
on 
all 
three 
locations 
with  
the 
same 
20% 
locking
> 
front.
> 
More 
than 
that 
in 
lockup, 
the 
car 
became  
unpredictable 
and 
understeer
> 
reared
> 
it's 
ugly 
head.  
If 
you 
go 
over 
to  
offroading, 
a 
torsen 
front 
is 
found
> 
quite
> 
often, 
almost 
always 
accompanied 
by  
lockout 
hubs.  
I 
drove 
a 
torsen 
front
> 
in 
a
> 
first 
gen 
4R, 
and 
it 
was 
obvious  
that 
the 
hubs 
were 
still 
locked.
>
> 
The 
mod 
can 
be 
done, 
I 
just 
question 
where 
one 
would 
find 
a 
performance
> 
benefit.
>
> 
TB
>
>
> 
In 
a 
message 
dated 
2/4/2008 
7:53:34 
P.M. 
Central 
Standard 
Time,
> 
fastscirocco_2000 at yahoo.com 
writes:
>
> 
I 
don't  
think 
you 
understand 
me 
correctly.
>
> 
He's 
putting 
the 
rear 
diff 
out 
of 
a  
V8 
into 
the 
front 
diff
> 
position 
in 
the 
6 
speed 
transmissions  
(edu/dsy).
>
>
>
>
>
>
> 
**************Biggest 
Grammy 
Award 
surprises 
of 
all 
time 
on 
AOL 
Music.
> 
(
> 
http://music.aol.com/grammys/pictures/never-won-a-grammy?NCID=aolcmp003000000025
> 
48)
> 
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> 
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mailing 
list
> 
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> 
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>
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