[jdean]

I read something in a book( I think it was in "Power Secrets by Smokey Yunick") about chain vs. gear drives. He said he would never use anything but a gear drive. THis was after he fabricated a clear timing chain cover and watched the violent motions made by the chain whipping back and forth, each countermotion vibrating the cam back and forth as it was turning.

Must not be a real problem since almost all engines use this, but an improvement is an improvement just the same.

If you have ever seen a loose fan belt vibrating, that image is what comes to mind.

I suppose belt driven timing gears with a tensioner would not have this problem, but they are more expensive than gear drives.

I'm going with a gear drive soon.