@veeeight, that doesn't make sense if there won't be a 'superior' replacement until March 2016. If the euro part was ok, then you'd think they'd sub that in. Unless the engine/cam is different. Which is possible if the USA engine is direct injection only vs direct+indirect for everywhere else.
The aftermarket cam looks a more aggressive profile too, wonder what that would have done in your car... Probably would have been too much for it! (if you ever did get it to run properly with those cams)
My initial comment was more to do with the chocolate cam followers under the HPFP in previous S3 (and 2.0TFSI), leading to the eventual destruction of the follower, HPFP and sometimes camshaft!
I guess it's a bit early to see if the 8V cam follower has the same issues :/
I assume you just change yours at regular intervals?
Yes that's the answer....regular follower changes,but I cannot remember the intervals.
That cam was impossible to time with the stock ECU,and so we scrapped it,whereas my current ECU offers VVT control so it would probably have worked with it.
The biggest problem was how far off-centre the lobes are,and in any case the stock cams with the new ECU and it's range of VVT control makes over 600bhp anyway.