I just used the 5% because I wanted to burn it up so I can make fresh stuff. And I also feel it's a good baseline because I like to compare performance with the fuel used. I'm sure it will take more nitro, I just don't have any 10% or 15% mixed with all castor oil in the fuel. I wanted to have an idea if this engine is severely down on power or not. I'll find another muffler that fits. I used an old Thunder Tiger .25 muffler on it because it was a bolt-on fit and it was sitting on my bench. I'll see if I have another muffler that will fit without major modification and I'll also run the engine sans muffler to see what it will do. It's gonna get a Davis Diesel conversion head, so I like to have a good baseline on glow to compare to how it does on diesel.

The 10x6 will be my benchmark diesel prop as that's what I used on my K&B .20 that I'll compare this engine to and later the K&B .28.