Good replies so far, this is exactly what I'm talking about.

I was always fascinated, even back in the 70's, how Stock eliminator cars could continuously break the index with heads that either on paper or on a flowbench 'won't fall out of a tree'.

There is a lot more to where the head is flowing and where the piston is WHEN ITS FLOWING that determine how hard the mix gets squeezed and turns it into work propelling the car.