Phil, so are you saying that if he fits:
a larger plenum
a larger throttle
and a larger turbo
It will then be more driveable at low rpm and part throttle?
if so
But just for the record, as you still dont seem to grasp it, no matter what size throttle he has on there, it STILL going to be a disadvantage to driveablity to use a larger plenum.
If you had two engines with a larger throttle size and one had the smaller plenum that would respond better too, not just if you did it on 2 engines with smaller throttle sizes.
There is NOTHING one dimensional about it at all, its always the case!