I am looking at it this way, streetable, and practicality.
Of course you can turbocharger any engine, but some times it is not practical. With that high of comp ratio, and the effciincy of the heads, that is all I am getting at. Of course it can be done, but its not always the best way of going about it.
With that head, your going to see much greater gains with lower compression, that is all I am sayin'. If I was to go through the trouble of installing a turbo, you can bet that I am going to decrease the comp ratio a little, to make it more street friendly. Is there any problems with quench on these engines?
I take it from your response those engine have issues with the bottom ends? I am looking at more like a detonation nightmare. Of course tuning it will cure that, but it will not be in a very power friendly range, well there are band aids you can use to help of course, but I am talking your normal run of the mill, backyard turbo install. Nothing too fancy.
I like high compression turboed engines, but 10.3 is still a little too high for me, which is the engine we are reffering too, right? Can you show me some 10.5:1, 4 valve per cyl engine running on 93 octain, at 10 psi? That is a pretty impressive set up for some good power.