Murnan Modified RBM3 .12 engine

Murnan Modified has announced that their RBM3 engine for 2011 is now available. The engine has an increase in power over last year’s model, without sacrificing much run-time. In development over the past year with feedback from some top level on road drivers, at top level on road racing events around the world, the new design has been track and dynamo tested to ensure that it is faster and still easy to tune. The engine is also still getting enough run-time to easily finish a 5 minute qualifier in any conditions, even with the most aggressive drivers. The power increase can be attributed to the new sleeve, crankcase porting, new crankshaft timing and a special ceramic main bearing. The crankshaft also has a new, more balanced design, which helps overall power and r.p.m. while the new carburetor allows for very easy tuning and restarting when the engine is hot. Finally the new cooling head design keeps the engine temperature over 20 degrees cooler than last years model.

Source: Murnan Modified [murnanmodified.com]