1. The engine is running quite rich.
2. Its only a 22x8 Menz that is on there. If I go down further the engine will rev to high
3. Using 30:1 BP mineral oil, same fuel used in another DA50 setup and runs fine there
4. The cowl has a BIG hole cut in the back. There is plenty of air flow there
5. The compression is good when the engine is cold, just when the engine run it gets very hot.

Peter