How To Figure Compression Ratio

if its a high static CR engine running pump gas and has iron heads id guess the cam was chosen paying particular attention to dynamic compression ratio. i.e everything that Rusty said in his post mashed into an easy to use figure that can be related to something we all understand which is static CR dynamic CR is a tool not the be all and end all but it can shed some light.

i.e its not the the static cr that makes it ping its how much compressing is done after both valves are properly closed and the speed of the piston doing the compressing

dynamic CR is like static CR but takes into account rod length and stroke hence the position of the piston and its speed, and the seat to seat time of the valves

with the right cam you can run high static CR motors on the street BUT the kinda cam we are talking about will tend to rob some of the low RPM torque
this might not be an issue with the right gears and converter but it would be obvious in a manual car unless you move to port on port induction which can help grab some of it back.

id be inclined to say don't worry, someone put some time and effort into that combo and it works


Dave