Modified 5000 Turbo Vacuum Hose layout

[Ben Swann]

On Wednesday, June 19, 2002 1:15 PM, JShadzi at aol.com [SMTP:JShadzi at aol.com]
wrote:
> Good stuff, glad things are running well, how does the car feel?
>
> Javad
>
Quattrophile,

Several folks had asked this question.  So I thought I'd let the list know
that my seatopants dyno results are great so far.  I have not really found
any place that I can really run with the car, as it hits the desired boost
in seconds.  I'll try to be as objective as I have observed:
Positive pressure by 2000 RPM
1.3 Bar by 3000 RPM
1.8+ at around 4500 RPM

This is by driving under as much load and up hill as possible.  Up hill is
the only way to test as you are doing 80 before you know it, or running up
on other cars.  I'd like to get an objective flat run with stopwatch test,
but really have no place here to run - 'til next week.

Anyway, the car was fast before, and once the boost spooled up, you felt
like you were being launched in a slingshot.  Now,  although the car is
surely faster, I don't get the slingshot feeling, because the boost spools
up right away and acceleration is more constant and right from the get-go.
 That is about as objective as my seatopants dyno lets me be so far.

With the QLCC chip, and a variable resistor set to around 4Kohm, I was
running over 15 PSI (conservatively) before any modifications to the
engine.

WIth the current setup, I feel detonation creep into the works at around 18
PSI, so I backed off the knob to 16 PSI where it is smooth with no timing
retard feeling.  I think 18 was the limit before changes too, so that must
be the limit for the CIS setup and the MC-1 compression ratio as used in
conjunction with QLCC chip..

I am now running with the knob backed off to around 16 PSI.  I was able to
set the variable resistor up to around 4500 ohm ( was 4000 before the
work).  Remember the original schrapnel/resistor mod setting is 470 ohm, so
this is much better in that is allows to fool the ECU into over 1.8 bar,
but not getting to radical with skewing the timing.

Once I get a little more time, I will be setting up Javad's 034EFI
controller for the injector... then I can crank up the boost even more, if
that is even necessary!

It is good to get to a successful completion point on "Pearl", as now my
current project is to build a second story on our house which is located
next to the parking lot where I have a serious problem of Quattrois
Accumulatis, so the AUDI projects will be kept on the back burner 'til I
complete the plans - then I have 2 Quattros and 1 Coupe to spruce up and
sell before any more work on Projects GTQ.

Ben
> In a message dated Wed, 19 Jun 2002 10:51:56 AM Eastern Daylight Time,
Ben Swann <bswann at worldnet.att.net> writes:
>
> >
> >Last week I posted regarding not obtaining the anticipated boost after
> >rebuild and modifications to our '87 Turbo Quattro.  I received a lot of
> >good advice, and after reapeatedly hearing to check my bypass valve
setup,
> >found to my surprise that that was indeed the culprit.  I was sure I had
it
> >hooked up correctly, but as it turns out the port  I used was the one on
> >the throttle body that did not measure manifold vacuum correctly for the
> >bypass valve.
<SNIP>
> >
> >Thanks also to the members in this list who gave advice along the way.
 I
> >never would have undertaken this kind of DIY task without the
information
> >and encouragement that this list provides.
> >
> >Ben
> >'87 5000 tqa - Engine rebuilt incl. following -
> >T03/K26 hybrid turbo.
> >Elgin 270i260e cam to be reground to a slightly tamer 260/254.
> >adjustable cam sprocket -  currently set for 3 deg retard on stock cam.
> >new valve seals, lifters & techtonics springs
> >new piston rings, connecting rod and main bearings, all new seals.
> >2-Piece Exhaust manifold, highflow cat and 2.5" Stebro exhaust.
> >All visible casting flash removed from components.
> >Mild port and polish to head and manifolds with ports matched.
> >Bypass valve located in intercooler where untapped hole was with bypass
> >flow directed toward turbo
> >Supplimentary fuel injector installed in intercooler (but not connected
to
> >fuel or 034EFI yet) - injector is inline just prior to throttle body
hose.
> >200 Flywheel, Clutch and Pressure plate, slave cyl.
> >QLCC chip with variable resistor modded ECU, Schrapnel Knob + 2 bar SJM
> >spring for control.
> >
> >
>