More to Heads than just CFM Flow

Recently a well known racing head porter asked for some graphics (pictures) for an article on head port design.  His article dealt with there is more to a head’s performance potential than just CFM flow numbers.

What’s Going on Inside the Engine

Our engine performance simulation program (Engine Analyzer Pro) produces what we call RPM Data like torque, HP, fuel flow, BSFC, etc at each RPM of the run.  It also produces Cycle Data which are things like cylinder temperature, cylinder pressure, piston thrust on the wall, intake valve lift, intake valve flow, etc at every 4 …