RE: Fox .50 (where the Fox´s fans?)
I'm getting about the same power, but mine is a bit over the hill and using lower nitro. I think you should get about 14,000 when it is broken in. Less with 5%, I think there is a low compression version, not sure, not mine. But you really can't tell with a new engine, the compression ratio has noting to do with the ring seal, and it may have as much or more compression when broken in. Compression leakage may be why it is running well on 10% as well.