Travis,
I believe you are a bit inconsistent, you benchmark BMW 3.0T engine yet do not seem to have deep knowledge in those since now you talk about increasing stoke being a problem on the 3.3T... As you can see below the 3.3T is oversquare and have a very short stroke and strangely KIA decided to keep a very low redline while in theory they would have been able to have it highier because of the short stroke engine.
In comparison the BMW B58 have a significant longer stroke yet highier redline in most of their car so the stroke of the 3.5T still quite shorter than the stroke of the BMW B58 should not be the limiting factor for highier RPM and red line....
So if BMW engine is the benchmark in terme of stroke/bore ration the 3.5T is still far from it. And yes they could put all new technologies on the 3.3T but why doing so if all this is already tested and working on the new engine? They should only increase the turbo size to they it can keep the boost in the highier RPM range and improve cooling if they want to keep the 3.3t for now while significantly increasing the hp but all of this based on rumor aint happening.
3.3T is oversquare (1,10 ratio)
Bore: 92.0 mm (3.60 in)
Stroke: 83.8 mm (3.30 in)
3.5T is oversquare but closer to be square (1,06 ratio)
Bore: 92
mm (3.6
in)
Stroke: 87
mm (3.4
in)
3.0T B58 from BMW just to compare is undersquare (0,87 ratio)
82 mm (3.23 in)
94.6 mm (3.72 in)