played around with one a while back: [link]http://www.rcuniverse.com/forum/m_1634271/anchors_1634271/mpage_1/key_first%252Cmvvs/anchor/tm.htm#1634271[/link]

the rpm figures in that thread are without reworking the head button. i'm also not really happy with the way i ported it and have since obtained a new cylinder/piston/rod set (MVVS parts are cheap!!) and will try again as soon as i get the time.

even with the modified porting the engine is a real puttytat.


dave