Injection & Compression Ratios

[G P J Collingwood]

Hi again,

I read that an advantage of injection is that it allows the use of higher 
compression ratios. Ok I also know that when you turbocharge an engine 
you want a relatively low compression ratio (but why?). Hence:

I am going to try my hardest to put K-Jetronic Mechanical FI on my 1398 A 
Series (Mini) engine. This (very modified) engine runs a 10.5 : 1 
compression ratio, and the mini specialist reckons 11 : 1 is the best 
managable on ordinary fuel.

When I put on the injection will this mean that the engine COULD run a 
compression ratio of say 12:1 or higher, hence 10.5:1 is relatively low 
and will be okay for running a turbo? The K-Jetronic is supposed to cope 
well with a turbo as it gives the engine the same air/fuel mixture, 
independent of the amount of air/fuel mixture ingested.

Many thanks to anyone who can educate me on anything I've got wrong and 
thanks for dashing my hopes too!!

Giles
Durham/Hexham UK
1980 Mini Clubman Estate 1398cc