What are opening and closing ramps on a camshaft profile and why are they so important? Why do we use nested or beehive valve springs? When is it best to use pushrod valve actuation or DOHC shim-under-bucket tappets or finger followers? Should we drive cams with gears, chains, or belts? Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer (but mostly Kevin...) talk about the intricate details of opening and closing valves and different types of drive systems. <br /><br />Subscribe to Cycle World Youtube: http://www.youtube.com/c/cycleworld?sub_confirmation=1<br />Listen on Spotify: https://open.spotify.com/show/6CLI74xvMBFLDOC1tQaCOQ<br />Read more from Cycle World: https://www.cycleworld.com/<br />Buy Cycle World Merch: https://teespring.com/stores/cycleworld
