Variable Cam Stuff

[Andrew W. Macfadyen]

I suspect that is why most production systems seem use oil pressure actuation to
gain some damping.

Gary Derian wrote:

> Another issue is that the torque on a cam is not consistent as it turns.  A
> V-8 pushrod cam is not too bad but a cam for a DOHC 4 cyl  or V-6 really
> jumps around as it turns.  A variable timing device needs to accommodate
> that.  I think a simple friction or centrifugal device would not control
> position well.
> Gary Derian <gderian at cybergate.net>