Moin, I have a few questions. 1. The timing belt like tensioning rollers are made new with my xe. But I think that after a little bit of heating in the stand it gives off very loud running noises. Sounds like a scraping. One might think the tensioning rollers would be in the bucket, but of course this is not the case. Is the noise normal? 2. My hydro’s clatter very clearly even after hot driving. Mantzel and Opel now said to me that it doesn’t matter, even if they’re ri What do you think about this? 3. Does anyone have an idea of how speed-proof the c20xe is now really? Do you mean, how long can you drive it on the track with maximum speed? Mine turns up to about 7400 tours, because of Mantzel control unit, whereby I have to say that I usually switch it at 7000 when it is extremely fast. 4.Now you think of this possible number of days of course about d using a rather sharp camshaft, but does the xe make the 7400 tours permanently with the acceleration, or should one rather choose a camshaft which has a lower speed band, but earlier comes but less peak power? I mean, he is anyway up to 4000 tours. which camshaft do you recommend–which one notices neatly, but at the bottom does not slow down??? At the c14nz at my Corsa the 270 Mantzel was a good choice.