Here's a link to a video, before you slate me... Yes, I'll put the tappets back. I set them cold and now I have a sewing machine effect, that I'll put back but this video shows the drop in revs, even when revving.
I think you'd be looking at three, maybe four teeth for twenty degrees, but why not have a look at the valves for #4 at tdc on #1. See how far it is either side for them to start moving.
I think you'd be looking at three, maybe four teeth for twenty degrees, but why not have a look at the valves for #4 at tdc on #1. See how far it is either side for them to start moving.