can it be bad running a engine to rich?

[cameltoe]

I have a New OS .37SZ and its running great. I can get 10.5+- of pitch on my raptor without bogging. I run it quite hard practising new moves. but I was wondering if I could damge the engine running it too rich. the main and idle are close to 1 1/3 out and when I touch the backplate its only lukewarm. I could hold it there forever. Im running 30% nitro and 20% oil it also doesnt smoke very much. any ideas?? thanks

[LAMAR COOLEY]

cameltoe,
If you believe the engine is running great, then I wouldn't be concerned about it being rich.
However when breaking in a new engine, it's sometimes important to bring the engine to operating temperature for short periods. This really depends on weather or not it's ringed or not.
Regards