Trg and Tshift

[QSHIPQ <QSHIPQ@aol.com>]

>********   no   *************  it won't.
>you keep treating the torsen like an open diff.  the torsen will send a
>>*****************proportion***************** of torque to the slower moving
>driveshaft until torque equilibrium is re-established.  it is not an all or
>nothing device like an open diff.
>the torsen can send 50% torque to a driveshaft, 55%, 60%, 62%, 66% up to 70%.
>it will seek a torque distribution equilibrium between the driveshafts.  once
>this has been achieved, ***no*** more torque is transferred. you keep
>overstating this (or perhaps misunderstand this point) in order to make your
>case.
>in my 'wheel lift' scenario (see previous post), the torque transfer occurs
>twice, and both times it's an advantage to the vehicle.  no bite.  end of
>story.

Dave:
Reread my posts.  Trg = 300lb/ft car 75/25/25/75.  KISS, look at what that
means in Tshift.

T1 = 225lb/ft
T2 = 75 lb/ft
OR, anywhere in between.
T1 = 75 lb/ft
T2 = 225 lb/ft
Tshift MAX = 150lb/ft

That is correct as written thruout my posts.  You can't receive any LESS
torque at either dif that exceeds the ratio of the torsen to Trg.  That is 25%
of 300lb/ft, which is 75lb/ft.  So written.  An opposing wheel, by the same
formula, can never get MORE torque at either diff that exceed the ratio of the
torsen to Trg.  That is 75% of 300lb/ft or 225 lb/ft.  So, KISS
T1 + T2 = Trg
T1- T2 = Tshift 

So 225 + 75 = 300
and 225 - 75 = 150 

And anywhere in between.  So, Max Tshift is a constant, pick the torsen split,
it has a Max Tshift with it.  Tshift is the amount transmission of Trg that
SHIFTS from  front to rear diff.  A 3:1 Bias Ratio, defines the above.  Maybe
you are getting confused on the collective BR verses the Tshift.  Tshift is
the amount of torque that moves from one axle to another.  BR refers to the
maximum amount of torque that can be at either the front or the rear
differential (25% of Trg + Tshift in the case of the audi Torsen).  You can't
shift BR, only a 25% of it's maximum.  By definition.

Reread my comments Dave.  You can have torque shift without the torsen sensing
wheel slip or lift.  In fact, you can also have no torque shift with the rear
wheels spinning.  If there is no forward spinning, you haven't done anything
to reduce the effect of Trg.  Equalization only occurs if the total available
traction has been reduced.  given the right chassis attitude (track), you can
have max Trq, AND have wheel slip (rear), yet you never did anything to reduce
Trg to the tarmac.   Why?  because the torsen INCORRECTLY assumes front wheel
spin when you slide the car sideways (when what you really have is rears
slowing by track, not the fronts spinning from traction).  It also INCORRECTLY
assumes that slower spinning rear axle has more traction than the front
(oversteer, and not a bad thing yet, but power up, and things change).   You
are correct assuming you lift a wheel in the front, Trg reduces, equalizing
the F/R split.  For the rear, it depends on the rear diff.  What I am
explaining is NO wheel lift at all, a spinning rear wheel, and 100% Trg.  By
the same properties of that Torsen that gives max traction in a straight line.
HTH

Scott