Pull,

I know I said it seems to run fine, but it runs dirty, here is my thought...

If I run it lean to reduce soot, I run it too hot, if I can add more air, I can a more efficient ignition, more power w/o running lean so it will stay lubed, cleaner ignition, more reliability.

I am fairly new to gas, I have run nitro since 1976, so I know what I am doing there.

The thing I really want is reliability, over a $1000 in the engine and $2K in the airframe, I want to reduce the failure potential to only Pilot error.