For all you torque fans out there

Interesting story. But to give us an idea of the size of the piston, take a pix, with a penny or a standard sized pen, to place beside it. That is really effective in giving an idea of scale. A thousand words is worth one good pix.

Measurement #'s are fine, but many people are visual learners...to emphasize scale...again...place a well known object next to the subject...in this case the piston, connecting rod, etc.