ORIGINAL: bklearjet
I just bought an APC 12/11 prop and a jug of 25% fuel. Will install the prop this week and test the 9500 rpm thing with the O/S red pipe. This concept seems like running a 4-stroke engine. i.e. a four stroke has pull, torque, etc, and if this engine will only develope 9500 rpm's , then I go with it. Maybe the 25% fuel will help to pull it. Thanks guys for all of the advice.
This will work, though we never ran the engine with more than 15% nitro. 25% may be a bit high, and you may need to make and add another cylinder head gasket to reduce the compression a bit. We can only say "try and see" regarding the fuel. The prop and Hanno pipe will work together, but expect the RPM to be closer to 10K since it's an 11 and not a 12 pitch.