Joseph Tu wrote:

> Also is it advisable, can the 2.1 take the
> additional pressure.

Yes, the 2,1 can take additional pressure, my 2,1 (the European 112 hp
version) has a compression ratio of 10,0:1 vs 9,0:1 for the US spec engines.
I do not know what makes the diference in the compression ratio, probably
different pistons. I believe the combustion chamber volume is identical.

PerL
88 Syncro (112 hp)