MC-1 with MC-2 components

[Jorgen Karlsson]

The JY has 8.8:1 compression, solid lifters and does not use a lambda
sensor. I have two JY engines, the piston tops are almost flat, there is
only a very small dish in them. Since I don't know where the second knock
sensor is usually installed I can't check if I have a boss for it.

The JY engines was paired with a K26 turbo, maybe someone has swapped in a
complete JY block after they had killed the MC2 block. Maybe the turbo was
damaged and exchanged for a K26 at the same time.

Some text in the manual makes me think that sweden and Schwitzerland had the
same specification for the 200 in the mid eighties.

Jorgen

> >How is the compression lowered? The JY is a high compression engine.
>
> Really? People have told me, and I thought that the JY engine is
> almost the same as the MC-1, just with 2144 ccm instead of 2226. The
> turbo is a water cooled K26. One thing that really confuses me is that
> the block has got  "holes" for dual knock sensors, the JY block went
> out of production in 1987 according to Audi.. The engine in my car
> looks like a MC-2, except that the engine block reads "JY" and the
> turbo is a K26.. Strange?