M103 Compression Ratio

[oldskoolmercs]

Hi,

I needed to know the compression ratio figures for the 3.0 M103 engine... where they all 9.2:1.?

I have heard that some were 10.1 is this correct?
And is there any way of knowing when looking at the car or engine.

Regards,
Oldskoolmercs...

 

[carat 3.6]

Some were 10.1 but they are very rare, found in the w124 4matic and possibly the w126 300se.
If I remember correctly, the compression ratio is stamped on the inlet side of the block in white paint.

 

[RBYCC]

3.0L M103 in the 124 were all 9.2:1CR which makes them the perfect candidate for boost :bannana:

 

[oldskoolmercs]

Thanks

Some were 10.1 but they are very rare, found in the w124 4matic and possibly the w126 300se.
If I remember correctly, the compression ratio is stamped on the inlet side of the block in white paint.

3.0L M103 in the 124 were all 9.2:1CR which makes them the perfect candidate for boost :bannana: