RE: YS 110fz lacks of power
No, I had about the same 8700 rpms before , that´s why I hoped an improvement with the ring replacement.
Changing the valve cover gasket made it a little better (9000-9200 peak)
I`m just over 500 ASL, have tried 30% while ago but I haven´t noticed changes in performance (dont remember tach readings)
I thought my plane should be on the overpowered side at 7,7lb with this engine that`s why I`m scratching my head
Will watch the rear disc also, thanks still4given
Thanks again for everyone