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Quaife (operation of a quaife)



quaifes 'cheat' to sense torque, as they sense it based on relative motion between the 2 axles. it
is effectively a multiple-gear tranny fluid pump. the pump is driven by relative axle motion (one
faster than the other). this pump has a very high discharge head provided by an orifice that the
tranny fluid is crammed through. The result is a logarithmic resistance (read - torque transfer to
idle wheel), as the difference in wheel speeds increases. this is how the quaife pulls this off with
no wearing friction pads/parts. its nothing more than an over-engineered oil pump.

so... with the one wheel off the ground trick, as the idle wheel spins faster, the pump raises
discharge pressure, resisting the relative motion, thus transferring torque to the wheel that needs
it (just like its supposed to).

i picked this operation up my studying the quaife guts pic that has floated around the net (as well
as cheapass rons uninstalled quaife at cincy).
Al

Allyn Malventano, ETC(SS), USN
87 Rieger GTO Scirocco 16v (daily driver, 180k, rocco #6)
86 Kamei Twin 16V Turbo Scirocco GTX ('it has begun', rocco #7)
86.5 Occo 16v Trailer (dotting 'i's across the country, rocco #8)
87 Jetta 8v Wolfsburg 2dr (daily driver, 260k, 0 rattles, original clutch, driveshafts, wheels :)

----- Original Message -----
From: "Ben Beacock" <bennyb2k4@sympatico.ca>
To: "Scirocco. org Mailing List" <scirocco-l@scirocco.org>
Sent: Wednesday, August 14, 2002 8:11 PM
Subject: RE: Quaife


> That wouldn't work unless you lightly apply the brakes.  The Quaife
> "biases" the torque at a ratio of about 5 to 1.  So if there is no
> torque on the lifted wheel, there is no torque to bias to the wheel on
> the ground.  If you apply the brakes, there is a torque applied to the
> wheel in there air, so the one on the ground will receive 4 times that
> in motion (brakes on the other side are on too)
>
> Ben
>
>
> -----Original Message-----
> From: scirocco-l-admin@scirocco.org
> [mailto:scirocco-l-admin@scirocco.org] On Behalf Of Tyler P.
> Sent: August 14, 2002 7:44 PM
> To: List (E-mail)
> Subject: RE: Quaife
>
> I guess you could jack it up on one side in the front.  Turn on your car
> and
> put it into gear and give it some gas.  If the wheel in the air spins
> but
> the other one on the ground is happy then you don't got a quaife.
> However,
> if you do have a quaife you may not be on that jack much longer :o)  At
> least I think this would be a way to test it, though I don't speak from
> experiance.
>
> -----Original Message-----
> From: Jim Mikesh [mailto:j.mikes@verizon.net]
> Sent: Wednesday, August 14, 2002 4:41 PM
> To: scirocco-l@scirocco.org
> Subject: Quaife
>
>
> How can I tell if my transmission has a quaife installed.  Quite some
> time
> ago there was a thread about a "quick" check.  If someone remembers
> please
> drop me a note so I can check my transmission.
> Thank you
> Jim
>
>
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