Rewatch the video, he covers it in a limited way. He mentions upgrading if you go with added valve spring pressure or increased RPM. I would read into that a little more and say along with an upgraded cam, valve springs and RPM I would upgrade if you are running a high pressure or high volume oil pump as the chain indirectly drives the pump - you know - distributor to oil pump shaft to cam gear to chain. I think we all get it - if your motor is being upgraded, at least upgrade to a double roller chain.
Dylan Lucas Maybe if you only race and you tear the engine down after each day at the track. Roller sets are so reliable they aren’t really even considered wear items for scheduled replacement on stock vehicles.
Millions of diesels covering billions of miles with gear drive cams. Every Powerstroke, every Cummins, every rig on the highway. Nothing else comes close to that level of proven reliability. I also love how every video that talks about gear drives only shows the garbage floppy idler junk. OEMs use fixed idlers. And fixed idler systems are available for the same engines as those garbage systems. Much quieter, more precise, more reliable. Timing belts are the least reliable system. No way I would put one in an engine.
