Vic, you brought up a good point about HP. We could bring up a 2.9 liter type of engine with 20 hp out of that huge cubic inch model T, but time and engines have evolved into tinier and more powerful engines. 5hp out of the holes and 26 to 16 mpg, almost 2 times the bore size.
If we took a H-D and matched 120tq to the 14's 120tq, like Wolfy said, it's 'all in that mid' with the H-D and you've seen that video with a 1320cc or so evo H-D beat that jixxer in that dutch video, where Heineken can beat the more powerful higher hp rated gix? It may have more HP, but that harley torque ate that bike up.
So torque wise the H-D signs off. HP wise, the gix keeps going and going and going is the HP. So your point is more the apple/orange or a model T vs. 2/3rds of the engine removed and that's 20 hp vs. 200 hp. So where are we at? Cam profile is one. Forget bore and stroke because those combos keep coming and going. Has to be the head is where the HP lies.
So, speed of air in and how well the fuel is atomized is the means to the end. I'm not about to add, but I have to is to show the evolution of the valve angle and removing that bend in the port: is more speed of the same gulp of air having less drag. The injector that can break the puddles of gas out of a T's carb and that distribution of the air to fuel ratio. That is basically it
I don't know if that apple answered the orange, so poke holes in this like a covalent bond.
Tormenting the motorcycling community one post at a time