'89 200 TQ ?

[David Head]

And an airbag for the later 89 models...

Eric_R_Kissell at email.whirlpool.com wrote:

> On 3/10/2002 at 5:51 PM, Jim <Sonar465 at aol.com> wrote:
>
> >I am looking at a '89 200TQ that has 39K miles on it.  I am going to
> >replace my kind of beat up '87 5K TQ.  Do the '89's use the same computer
> >as the '87's ?  I have a IA Stage II box in my '87 and would love to
> >transfer it over to the '89 if they are compatible.
>
> Jim,
>
> First, 39k miles is suspiciously low. That works out to 3000 miles per year over
> the 13 years of this cars life. I would be afraid that the car is either
> misrepresented or has not been driven enough.
>
> Second, 1989 was a transition model year. I have a 1989 200q Avant that is
> mechanically pretty much the same as the late 1986-1988 5000tq, though the
> interior is the revised "curved dash" style of the 1989-1990 200 models. It
> would be nice if someone knew a VIN split between the "early" 1989 and the
> "late" 1989, but I suspect that there is not a clean transition as different
> parts bins emptied at different times. The later 1989-1990 200 had dual knock
> sensors and a higher compression ratio and a computer change as well.
>
> >From Scott Mockry's site, http://www.sjmautotechnik.com/boost.html#intro
>   >The 1986-88 5000T/Q and the early 1989 200T/Q with the single knock sensor MC
>   >designated engine with 7:8 to 1 compression, were designed to run 1.42 bar
>   >boost (absolute) as maintained by the MAC11 Engine Control Unit (ECU). This
>   >1.42 bar absolute pressure, corresponds to ~6.1 psi gauge pressure.
>
>   >The later 1989-90 200T/Q, and 1991 200T with the dual knock sensor MC
>   >designated engine with 8:4 to 1 compression, had slightly lower boost levels,
>   >set to 1.39 bar (absolute) by the MAC14 ECU. This 1.39 bar absolute pressure,
>   >corresponds to about 5.6psi gauge pressure.
>
> My 1989 200q Avant has a single knock sensor and uses the MAC11 ECU like my 1986
> 5000cstq. I have switched the computers between these two cars with no
> difficulties.
>
> So, see if you have one or two knock sensors. Actually, the ECU is easy enough
> to pull you could pull it and see what is in your 1989.
>
> HTH,
> Eric R. Kissell
> 1986 5000cstq, 1.8 bar (SJM), K24, Fuchs
> 1989 200q Avant, 1.5 bar, K24, Bilsteins
> 1987 VW GTI 16V, 1984cc, Bilsteins
> Evansville, Indiana, USA