RE: Rossi engine info?
hi
If you run a pumped motor you have a bigger carb as they do push more fuel. but just because the motor can push more fuel does not mean it has more power. Power is generated in the bearings, tolerances and flow inside the motor as well as the compression. As the rossi is an Italian made engine it is designed to run on low nitro as nitro fuel is not available in Europe. The tolerances are tighter in the rossi over the OS so it will generate more power. I pulled an OS 61 off a plane and replaced with a rossi 61 remarkable and really noticable difference. The rossi was superior running lower nitro fuel.
Tony