[20v] [Es2] Audi 20v conversion

Ben Swann benswann at verizon.net
Wed Dec 3 09:29:34 PST 2008


Chris,

I removed the battery box  - cut out with wheel and other tools.  Check and recheck that
you won't cut into anything in a bad way.  Remove the AC evap unit from under dash.  Use
good large hole saw - forget which diameter, but is at least 1.25".  Make hole about
3/4" from seams where batterybox upper left corner was - as facing box.  Wait - now I
recall the hole cut was for other conversions I did - for a coupe GT and also for the Ur
Quattro ( no bat. Box on UrQ, but hole was not there for MC-2 harness.

For the Coupe Quat, I pulled 7A harness out - it is on drivers side an no easy trick,
but doable after getting a few thing out of the way.  I did remove the entire dashboard
for this.  The AAN harness from S6/100 went right in with help from someone else, but
tricky to route under/around brake and booster.  The 200 harness is similar if I recall,
but might be right hand - I forget.  Check out orientation - if 200 harness is meant for
right side install, then you might need to cut the hole as above.

On the Coupe Quattro you need to remove the battery box for turbo and wastgate clearance
- or at least should. I have some pictures of this somewhere, including fireworks of me
cutting the hole.  I'll try and send you some.  Probably time to start documenting this
conversion even though not complete.  The job after cutting and painting looks like it
was meant to be that way from the factory ala RS2.

Ben

-----Original Message-----
From: es2-bounces at audifans.com [mailto:es2-bounces at audifans.com] On Behalf Of Chris
Miller
Sent: Tuesday, December 02, 2008 10:29 PM
To: es2 at audifans.com
Subject: Re: [Es2] Audi 20v conversion

On a related note; where's the best place to cut a hole in the firewall for the 200
harness to fit the coupe q?
Chris

-----Original Message-----
From: es2-bounces at audifans.com [mailto:es2-bounces at audifans.com] On Behalf Of Jack
Walker
Sent: Friday, November 28, 2008 4:01 PM
To: 'Ben Swann'; flamingollama at yahoo.com; es2 at audifans.com
Cc: McCohens at aol.com; 20v at audifans.com; quattro at audifans.com
Subject: Re: [Es2] Audi 20v conversion

So convert from a 10VT to a 20VT, sounds pretty simple doesn't it?

Well I'm into my 4th year of finding parts that don't really make it, the total of the
parts that do, that cost more than the donor motor, finding that if you really don't
have fabrication skills.... 
Although I'm going to say if you're really up for it, a totaled 91 200/20V TQ with a low
mileage 3B motor, and it would be whole hell of a lot easier.
I got the same advice, but neglected to follow it.

Jack Walker

-----Original Message-----
From: es2-bounces at audifans.com [mailto:es2-bounces at audifans.com] On Behalf Of Ben Swann
Sent: Friday, November 28, 2008 12:28 PM
To: flamingollama at yahoo.com; es2 at audifans.com
Cc: McCohens at aol.com; 20v at audifans.com; quattro at audifans.com
Subject: [Es2] Audi 20v conversion

Ditto on this!  I don't know how anyone can suggest a turbo conversion, 10Vor 20 V being
easy and I suppose that is relative.  It is one thing to install a larger displacement
engine or higher compression with some fueling and ignition adjustments.
Totally
different when you need to re-engineer intercooler location and turbo induction.  I
presently have my '90 Coupe Quattro dismantled awaiting such conversion.
Yes the
conversion is made a bit longer process by my objective to do it clean and correct, but
the dashboard had to be removed and much of the interior yanked just to do the "trivial"
wire harness swap. 

Integrating electronics "properly" will take likely at least 3 complete days.  The large
mechanicals(engine, trans, clutch) are a straightforward 1 man-week by someone who knows
what they are doing and has all the correct parts in hand.  On e a performance build,
one almost always ends up tearing down the donor, but not necessarily. Even minor
cleanup items, such as manifolds, fittings and gaskets take days.  The turbo and exhaust
portion can add significant time.   My "ES-2" conversion is further
compounded with the
Ersatz nature and desire to install a 6-speed transmission and all that entails, but if
I were only doing a "straight-forwared" swap from 7A to 3B or AAN, we are talking no
less than a complete man-month from start to finish by one who knows what they are
doing, with proper tools and some help.

Do not take these projects lightly!  Someday I'll document my now mostly completed Ur
Quattro conversion  - 10 valve turbo into 10 valve turbo with EFI conversion.  This
alone took my over a year to complete, although that was not all just working on the
car, and much was ironing out bugs that ensued after the job was "completed".  That was
Phase I and II.  Now it begins again with need to replace the turbo - sounds easy 'till
you try it.

Feel free to take a gander at some conversion outlined on my site - these are ones I
completed and documented years ago and will be playing catch up to document the last 2
or 3 I've been working on. http:// www.gtquattro.com many updates forthcoming this
month.

Ben

[Date: Fri, 28 Nov 2008 14:44:40 EST
From: McCohens at aol.com
Subject: Re: Audi 20v
To: quattro at audifans.com
Message-ID: <c8e.2e4aa8bf.3661a428 at aol.com>
Content-Type: text/plain; charset="US-ASCII"


As someone with a 10VT in their 80 and former 20V owner I can say unless you

intend to track the car a 20VT is overkill.  I would also suggest you 
seriously evaluate your mechanical skills or bank account.  The  turbo swap
is by no 
means a bolt in proposition.  Lots out there have done it and may say it is 
easy.  If so, ask them how much they would charge for doing the swap on your

car.  Getting the engine in is probably the easiest  thing.  Installing a
CIS 
and intercooler, decent exhaust system is much  tougher.  Aftermarket EFI is
a 
great choice, but nothing out there is a  bolt in system.  Lots of little 
surprises and chances to screw up.
 
That said, the 10VT with low teens boost is pretty reliable, gets mid 20's  
MPG and is an absolute giggle to drive.  It will humble many cars and is
one 
of the best all time sleepers.  My 20V was plenty fast, but the turbo  10V
has 
better power that starts at lower revs and pulls harder.  
 
Feel free to contact me off list for more details.  If you live near  Bucks 
County PA stop by for a test drive  too.]

[Date: Thu, 27 Nov 2008 15:45:20 -0800 (PST)
From: Michael Walker <flamingollama at yahoo.com>
Subject: Audi 20v
To: quattro at audifans.com
Message-ID: <969924.32708.qm at web36803.mail.mud.yahoo.com>
Content-Type: text/plain; charset=us-ascii

I am looking to possibly upgrade my 1989 Audi 80 Quattro 10v to a 20v.
Either that or
rebuild my 10v. What is a good way to get a hold of a used 20v. I also want
to upgrade
with a turbo, which engine is better for that?]
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