Technically Jeff they are the same thing. When you are tuning a dual cam you are still "timing the cam, your just doing it twice and making them do it at the same time. Which would be synchronizing them. It's still timing though. So you could go either way on that one and be correct. And on the CPS system you would actually be timing two different cams, since they are timed to different locations and do different things. However if you said you were going to synch a single cam you would be using the incorrect terminology since there is nothing to synch the cam with. You would probably hear someone older and used to dual cams say this.

Single cams are so popular now that most don't know what synching cams means any more because they rarely see it or hear about it.

You could also call it tuning the cam if you wanted I guess. Or would that imply that you were changing the harmonics of the cam?

Paul