Originally posted by TOYMAKER
Just ran this engine this weekend on my new Cap232.
Bisson muffler had on hole plug by previous owner. Was very quite and tached about 7800rpm on an 18x6 w/Zinger on 15% Ritches brew and Perry/pump/carb tnak on C.G. Ran very smooth and predictable. Would run much harder on higher nitro, but all have is 15%. I unplugged the hole and gained about 250 rpm just a little louder but acceptable. I will try different props. 18x8 Simitar series is supposed to be a good one. I am also going to try a 18x6-10 for grins.
I now have a Zinger Classic 18x8 wide blade if someone could use it.... $10... I will mail it to you. Just wont work with this engine.
That Bisson muffler must kill horsepower. A large volume MCP, or a Krumscheid reso tube runs well with APC 16x12 and Menz-S 18x10. Both engines run at our field (one is mine). The 16x12 powers a RC1 Extra with unlimited vertical. The 18x10 powers my freight train for piggy-back duty.