I have seen no answers so far. You either need a dyno, or very sensitibe pant seats to get an engine just right! Exit seat of pants for model flight. We are most prone to judge speed by the noise an engine makes, which serves as substitute for plane speed.
Fact:
1)yes for piston porting, intake duct can be tuned
2) hardly: intake duct tuning in membrane induction. Too much resistance in the track, unless the reeds fling wide open by inertia. Let the guy who has intricate knowledge of reed inertia and reed cage volume calculations stand up here.
3) ?? in rotary disk. Most racers keep the track as short as possible, though the sinus-shaped piston velocity may set up sufficient wave activity.
ORIGINAL: Rendegade
Tuned intakes work well on 4 strokes, that's given, but on small 2-strokes, that was the original question, which has now been answered.
I guess the only way to have a long intake runner and still be effective would be fuel injection!