YS engines break in?
I have two engines for warbird racing. I have a YS-115WS and a DZ-70. I plan to run 50% in these engines or more. Should I break in per the instructions or on the higher nitro.
I am leaning to the higher nitro as the flame front and chamber pressure will be different on the higher nitro.
the 115 will be run fly with a 13x14/15 prop and the 70 on a 9x14.
Thoughts?