Hi!

I've read a lot about 20/20 YS fuel over the last couple of years. I am thinking about buying a .91AC, but don't want to spend the money it will take over the years ahead to use 20% nitro.

Will this engine run well on 5% or 10%, or even FAI? I know it won't make the same amount of power, but what about idle, transition, reliability, etc.?

Thanks,

Dave