hi i am 14 and am new to these forums but have bean reading them for some time.
i have have a really good idea for an alternative to cams and valves but want to know it if has already been invented. to help me with this could you list all (if any) alternative cam-valve systems you know off.
as you can tell i am not really willing to share my idea, but if it has already been invented i will tell you what is was.
please help
thanks