drnick

I don’t think it’s valve guides, more likely oil packing the heads at high rpm - the smoke is there only when he is at higher rpm. Otherwise the mixture seems nice and rich! Great vid of a 928 in action

SteveG

Nice! Love those single lane blind curves on euro highways. I drove a rental in the Lake country once, not like this road, but heavily traveled; sweat bullets on a couple of those. Used the horn and said a little prayer. Thanks for posting.