Hi @ all !

I've bought my .77 Mvvs, at www.mvvs.net , last year in spring , to put it in my Diablotin . It swings a 14x4 W APC at 11200 rpm peak.For a short time ,after firing up , at 11300rpm. I've set it to 11100 rpm for vertikal climbs .I use the Mvvs-header and a Alu-4- chamber muffler from KS.
0 Nitro and 15% synthetic oil( molsyn 60K). This engine is the most reliable engine i've ever had, at all rpm. Throttel respons is very good.
I think that the Mvvs-muffler and tuned pipes chokes the engine down ,
is better to get KS for maximum power. I use the stock plug.