float_6969 wrote:A bunch of smart stuff
Way to say what I said, but without being condescending and mean about it.
That being said, I really think increasing the compression ratio is going to give you noticeable results that don't require exotic solutions. The compression ration on these engines is from a time past when step one of turbocharging an engine was dropping the compression ratio really low. It's just not necessary with proper ignition timing and efficient intercooling. People are putting boost to FA20s in the FRS and BRZ and it has like 12:1. These numbers are in the neighborhood of what you are looking for.
That engine has dual injection, though, and the anti detonation qualities of the additional direct injection cannot be ignored and it is 200cc bigger, true, but there is no reason CA18DE pistons wouldn't work fin in a boosted environment provided the crowns were dressed a bit to knock down any heat riser sharp edges.