86 5ktq half year questions....

[Phil Payne]

> Anyone know if there are any changes to the motor in the half year
split of
> 86?  ie, was the 1/2 half of the year equipped with a different
manifold or
> something thats not on the later 5ktq?  I know about the G-54 brakes
and the
> AC controller differences.  What else is there?  Reason for asking
is, my
> new to me 86 5ktq seems to be significantly faster off the line than
my last
> 87 5ktq which had the same chip/spring in it.  Any ideas?

I'd pull the codes from the 87 car.  If it has a Type 1 WoT switch,
I'd also replace it.

There were quite a few undocumented changes around this time.  The
inlet manifold (034 133 201H) changed subtly - it acquired a raised
skirt around the injector area and a drain hole complete with a pipe
that is presumably designed to lead any leaked fuel down to safety
under the car.  Pointless, because the top of the pipe blocks up with
crud after a couple of hundred miles.

This change was made to the MB engine at around chassis 85-J-900644,
though about fifty later cars were fitted with earlier engines.  With
the MB, the change is significant because it also marks the timing
belt change and the change of the wastegate frequency valve boost
input from unthrottled to throttled air.

--
  Phil Payne
  http://www.isham-research.com/quattro
  +44 7785 302 803
  +49 173 6242039
.