I am curious though, from a pure air to gas ratio burning in the cylinders, how does the air entering into the block have anything to do with the calculation needed by the EFI for normal operation? Is the amount of air (pressure from combustion) somehow entering the combustion chambers and the ECU has to compensate for this during the normal cycle of the engine?
I know from Paul's post on page one he had to adjust for this because he vented the valve cover so it has to, But if both the block and valve cover were vented outside of entering the intake, an adjustment to the EFI would still be needed?