[torsen] MC conversion

George Stroe gstroe at home.com
Wed Oct 24 22:28:02 EDT 2001


Hi Javad, correct me if I'm wrong, do you have a home page describing the
conversion? MC-80q conversion? I've stumbled upon it in the winter, put it
under Favorites, tried to acces this evening but got "Cannot find server,
the page cannot be displayed". Have you changed the address?

George

----- Original Message -----
From: <torsen-request at audifans.com>
To: <torsen at audifans.com>
Sent: Wednesday, October 24, 2001 12:04 PM
Subject: torsen digest, Vol 1 #104 - 4 msgs


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> Today's Topics:
>
>    1. Pushing the N/A engine (Dave Hord)
>    2. locking rear diff (binding?) (I990V8QUATTRO at aol.com)
>    3. Fw: Quattro "Wind-up" Problem (urq)
>    4. Re: Pushing the N/A engine (JShadzi at aol.com)
>
> --__--__--
>
> Message: 1
> To: torsen at audifans.com
> Date: Tue, 23 Oct 2001 21:22:18 -0400 (EDT)
> From: Dave Hord <spokes at mail.the-wire.com>
> Subject: [torsen] Pushing the N/A engine
>
> All this talk of pistons lately has gotten me thinking...
>
> What can I do to the NF engine in my '89 90q.  I know, I know, swap for a
> turbo.  Well...assume for now that it's not an option (I have).
>
> What are my options here?
>
> I surfed the archives for a while, but couldn't find what I was looking
for.
> As I recall, a lister has pushed the naturally aspirated engine as far as
it
> will go.  Anyone want to offer a link?  Or...should we discuss here?
>
> -Dave
>
>
>
>
> ---------------------------------------
> 89 90q  295,000km
> http://home.the-wire.com/~spokes
>
>
> --__--__--
>
> Message: 2
> From: I990V8QUATTRO at aol.com
> Date: Wed, 24 Oct 2001 09:36:41 EDT
> To: torsen at audifans.com
> Subject: [torsen] locking rear diff (binding?)
>
>
> --part1_29.1ca09a4b.29081de9_boundary
> Content-Type: text/plain; charset="US-ASCII"
> Content-Transfer-Encoding: 7bit
>
> Hello all. I posted this question to the v8 list a few times a while back
> with no respons.  I have  a 1990 v8 w/auto and every now and then while
going
> around a turn or pulling out of a parking spot, the rear diff feels like
it
> locks up (wheals wiil scuff the pavment.) what would cause this? TIA.
Allan
>
> --part1_29.1ca09a4b.29081de9_boundary
> Content-Type: text/html; charset="US-ASCII"
> Content-Transfer-Encoding: 7bit
>
> <HTML><FONT FACE=arial,helvetica><FONT  SIZE=2>Hello all. I posted this
question to the v8 list a few times a while back with no respons. &nbsp;I
have &nbsp;a 1990 v8 w/auto and every now and then while going around a turn
or pulling out of a parking spot, the rear diff feels like it locks up
(wheals wiil scuff the pavment.) what would cause this? TIA.
Allan</FONT></HTML>
>
> --part1_29.1ca09a4b.29081de9_boundary--
>
> --__--__--
>
> Message: 3
> Date: Wed, 24 Oct 2001 07:16:07 -0700
> From: urq <urq at pacbell.net>
> To: torsen at audifans.com
> Subject: [torsen] Fw: Quattro "Wind-up" Problem
>
> ... well, here's something I posted to the list some time back ... Funny I
> don't remember seeing your post to the V8 list, but I could very well have
> missed it ...
>
> Steve Buchholz
> San Jose, CA (USA)
>
>
> > What is happening is that you are experiencing your rear Torsen diff in
> > action.  In a sharp turn each rear tire covers a significantly different
> > distance travelled.  The Torsen sense this as slippage and will tend to
> > lock.  The smooth pavement surface causes the outside wheel (the one the
> > Torsen "thinks" is slipping) to get less power while more is sent to the
> > inside wheel.  This effect should only be noticed with power applied.
> >
> > Anyone who has driven an earlier generation quattro with the rear diff
> > locked would probably recognize the "feel" when this happens.  On my V8
> when
> > applying a lot of power in sharp turns I can feel a similar sensation to
a
> > locked rear diff ...
> >
> > Steve Buchholz
> > San Jose, CA (USA)
> >
> > -----Original Message-----
> >
> > Is there anything other than bad front ABS sensors that could be causing
> > a
> > wheel/tire "wind-up" problem on my V8? When I back out slowly from my
> > parking
> > place, then cut the wheels sharply in either direction to go forward,
> > the
> > tires seem to skip and "wind-up" on the pavement, sometimes squealing
> > wheels
> > as they go. Last time this was caused by a faulty ABS sensor. It read
> > out as
> > a fault on the computer. But this time, not reading out. The sensors are
> >
> > staying in place, too. I just changed tires and, while the new 225
> > series
> > tires grab the road better, the problem still persists. Is this anything
> >
> > mechanical with the quattro system, or just more brake problems?
> >
> > TIA,
> >
> > Steve K.
> > 1990 V8Q  138k
> > Rockville, MD
> >
>
>
> --__--__--
>
> Message: 4
> From: JShadzi at aol.com
> Date: Wed, 24 Oct 2001 11:06:57 EDT
> Subject: Re: [torsen] Pushing the N/A engine
> To: spokes at mail.the-wire.com, torsen at audifans.com
>
> Hi Dave,
>
>  <<What can I do to the NF engine in my '89 90q.  I know, I know, swap for
a
>  turbo.  Well...assume for now that it's not an option (I have).>>
>
> WHY??
>
> Ohh, more on this later ;)
>
> <<What are my options here? >>
>
> On the street?  Not much, you only have a few options if you are ruling
out a
> turbo swap or going to the 20v head.
>
> Flow- A cam will help, as will port matching the manifolds and polishing
the
> ports in the head on in the intake manifold, but you already have the big
> valve head.  A good exhaust is a must, the stock manifold is pretty good,
a
> small improvment can be had with the triple outlet manifold from the 4kq.
> Not much you can do on the intake side, you could bore the throttle body
for
> some high end increase, but not much.  As long as you are sucking throught
> that CIS metering head you are limited.  I would estimate a really hot
motor
> with a well executed porting job, cam, throttle body, free flowing exh
> manifold/system would loose some bottom end power,  but could probably
make
> 150hp at 6k RPM, a 20hp increase over the stock 2.3 NG/NF output.  Still
not
> a fast car, but might pick of a second or so in 0-60.  Cost to do all
this,
> probably $1k to1.5K after the head rebuild, etc, pretty expensive for 20hp
> IMO.
>
> -Displacement- Using the Eurovan 95.5mm stroker crank, you could create
some
> additional displacement, about 2.5l or so.  Add this to the upgrades
above,
> and IME you could have about 170hp, with much more torque to boot.  This
> would be a real stump puller, super long stroke, you would loose some high
> RPM performance and smoothness, but have a great bottom end.  This one
starts
> getting expensive, after machining, custom rods, stroker crank etc, you
could
> easily have another $2000 into it.  Of course, this stuff always starts
> adding up, well, now that you're in there, the clutch, etc, etc.
>
> So, after these two areas of modification, you could have a quick, peppy
car,
> very tourqey, with good all around power, for about $3.5k-$4k (probably a
lot
> more), a 50 hp increase.  Remember, the 1994 BMW 325i came with 190hp and
> variable valve timing.  Those are not considered "FAST" cars, and you
would
> be lucky to keep up with one of those, and you can pick one up in great
> condition in the low teens these days.
>
> My recommendation is to do a turbo conversion, simply by swapping in an MC
> motor into your car, but keeping your stock fuel and ignition system, you
can
> safely run 8psi boost which equates to about 180hp too, with a lot of
torque,
> especially if you used a K24, turbo lag would be non-existent.  This swap
> could easily be done for under $1k, get a junk yard motor and replace the
> seals and headgasket.  Very hard to beat, without all the wiring and fuel
> system swap you have to worry about with a full MC conversion.
>
> I ran my 80q like this with a similar conversion for over 30k miles,
> performed very well and reliably, and I have assisted others in doing
similar
> conversions with similarily great results.
>
> Javad Shadzi
> 80tq.com
>
>
> --__--__--
>
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