Flywheel pins

[blarson at Zeiss.com]

--- Nick Lawrence <nick at beol.net> wrote:
> This is a multi-part message in MIME format.
> --
> [ Picked text/plain from multipart/alternative ]
> I need to add a timing pin to a flywheel for a
> conversion. The motor is a '91 10 valve turbo.
> Is there an established method to determine where to
> locate it? Is the correct position 62 degrees before
> TDC?  TIA
> Nick Lawrence
> --


Hmm, people must be getting conversion feaver.  Nick
I'm currently after the same info, if your using a CNC
machine, check out Nate's site.

http://www.newtsplace.com/90tq/index.php?content=faq.php&pagetitle=F.A.Q.
#23

Just curiouse, where did you hear 62 DBTDC?  After
searching for this on the list I found this post.

http://www.audifans.com/archives/1997/07/msg01029.html

Looks pretty good to me, What do you think Brian?


62btdt might be a good number, assuming you use the correct 0 degree mark,
which is not zero on your NG flywheel.  It is 6 degrees off on a MC.  You
could just scale around the perimeter 62 degrees, and drill your hole the
correct distance from the edges of the flywheel teeth.  You need to remove
material to clear the pin, and if the distributor is not within 2 degrees
of the correct location, the car will not start.  Here are some examples of
the pin location removing the minimum amount of material.

http://www.teenaflanner.com/chris/90tq_turbo_conversion_gallery/imagepages/flywheel_correct_pin1.html
http://www.teenaflanner.com/chris/90tq_turbo_conversion_gallery/imagepages/flywheel_mod2.html