Less ex. lift and duration on just the JDM motors?
Do you have the specs @ .50 thou lift?
That seems stupid but quite typical of these bitsubishis. So in theory there would be quite a gain in increasing them, mainly duration for more ex. to hit the turbine. Another trick for hi-cr motors is to run like 13.5:1 cr then toss in lots of int. lift and duration to bleed off cyl pressure but if it works at 7000 RPM they dont really know..is works at low RPM for puttin around w/o race gas though. All motor or spray cars obviously.