90tq update -- all problems solved ! (almost)

[JShadzi at aol.com]

Ed, congrats, I know exactly how you feel, and if my experience and others are any indication, you've got a long road of tuning and tweeking ahead of you, looking forward to hearing about it.

=)

Javad

>Hello gang,
>
>Thought I'd update audifans on the latest good news
>with my Audi 90 quattro turbo project ! (...on this
>very tragic weekend).
>
>My last post about 4 weeks I mentioned that the turbo
>motor ran out of breath around 4-5K rpms. It just hit
>a wall. I originally though the problem was due to
>mixture. With fellow lister Mike Gough we spent the
>better part of a Sat last week going over everthing,
>mixture, timing, vacuum to no avail. Later he emailed
>me with the thought that there was definetely a
>restriction in the intake somewhere.
>
>After thinking about my setup I came to the conclusion
>that the most likely candidate was the intake plumbing
>from the Saab turbo boot on top of the CIS meter and
>the inlet to the cool side of the turbo. What I had in
>there was making three 90 degree turns. After
>replacing this "Home Depot" setup with another one
>that only made two 45 degree bends, Holy Cow ! what a
>difference it made ! The first time out the motor
>cleaned revved to the red line in second gear making a
>decent amount of boost !
>
>I guess chauk it up another problem to newbie
>inexperience.
>
>The turbo motor has now totally transformed the car !
>It actually _amazing_ how smoothly and linearly the
>boost comes on. I had orginally heard that the MC-1,
>with the K26 turbo in the 5000 was a little bit of a
>low end dog. Not in this car. I guess the lighter
>weight of the car and the 8.5:1 compression of the new
>motor makes a big difference. I can honestly say the
>car feels  it has as much low-end power as the old NG
>with 10:1 compression. It just amazing (yes I said it
>again) how early the boost starts spinning up. I'm
>talking about boost coming on as low as 2000-2100
>rpms. By 2600-2700 rpms its fully spooled and I'm
>running through the tiny stock exhaust system. The
>response is really instantanous. I can't imagine
>better turbo response, the car is now truely a blast
>to drive. Third and four gear are especially fun.
>
>As far as the amount of boost its about a tame 4-5
>psi. I can wait to start cranking it up a bit! Today I
>discovered another minor problem. The intercooler is
>probably leaking (oil found and such). There are few
>other things to still sort out, but I guess thats what
>these projects are about.
>
>Well, its been a long hard road to the (almost)
>conclusion of this project. I actually started about
>1.5 years ago when I first bought the junkyard MC
>having been inspired by the 80/90q turbo conversion
>projects by D. Close and Javad.  I'm envious of those
>that had the knowledge and stamina to finish such a
>project in the time scale of weeks ! To my credit I
>had a lot of downtime assembling the totally rebuilt
>MC with a new head and pistons etc. and I did almost
>everything myself with just some final help fitting
>the new engine in the car. To be truthful there were
>certain times when I almost threw in the towel, but
>now that everything is done I glad I kept going.
>
>Future plans include upgrading the boost to around 6-7
>PSI with the stock CIS, bigger tires and brakes (found
>some nice 15" BBS rims at the junkyard for $80 bucks
>today !), and eventually megasquirt EFI
>
>Thanks to everyone on the list who at one point or
>another helped me out with a post or word of advice
>and special thanks to Mike Gough for helping out at my
>home base a few times.
>
>....turbo land is great, I'm (finally) a happy
>booster!
>
>
>=====
>-ed
>
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