would fuel with 10% nitro be okay for the 55ax or should i use 15%?

thanks

The manual say "5 % - 20% nitrometane". I use 5 % and the engine run good, excellent.

Always folow the mamual.

The Best.

Gabi.

i saw that in the manual too. i've been breaking in my 55ax on omega 10% . a few of the guys have told me to use 15% - 30% once it's in the plane.

O.S. recommends a fuel that contains 5%-15% nitromethane. Oil content should be NO LESS than 18%. A fuel with castor oil as a significant part of the oil package is highly recommended. Going to fuels with a higher content of nitromethane will not improve performance unless modifications to the engine are made, such as adding gaskets to reduce the compression ratio. Also, for most sport propellers, higher-nitro fuels won't help much. If you go for higher top-end RPM, the idle RPM will suffer, and the throttle transition will also suffer.

bax thanks again!!