Tom, I haven't had any luck finding animated squish, it would be great to get a
good visual image of the action as the piston and head come together and then
apart again.
Its a last opportunity to archive homogeneous mixture and near
100% mass fraction burn, most just hope for something in the 90% range and
fire the remainder in the cat. Even in a great running engine we have no way
of knowing how much of the combustion develops useful work.
