I just came back from the field after puting an ultra-quiet muffler on my MVVS45. It hardly does 10K RPM with 5%, 10300 @ 10%, both with a 12X4. It also lacks a lot of power. I previously had the black tuned pipe on this engine, and it was much, but much stronger.
I moved to the quiet one due to noise restrictions in the field I am flying from.
I suspect the muffler limits the RPM to about 10K.
Any similar experience?


Ilan Barak

ISRAEL