So the lower compression motor is now max at 9000 rpm so the duration should generally increase? Is there a consideration in cam design for longer duration for cylinder fill on lower comp. engines? Thanks for responding to my question.Duration is the ability to sustain power at a given rpm range. If you don't change the rpm than the engine will need the same amount of time (duration) to hold the valve open to make max power. The engine with more compression will just make more power.
This was a 7-8 to 1 deal? Just trying to get an idea of what longer duration will do in low comp. Supercharger deal. Thanks for showing your results on a cam change.