Originally Posted by
airraptor
Dave is correct 20% nitro is plenty for silver as a WM 46 size warbird with 20% nitro, YS 115 and 14x12N will run 1:45 all day long. I have tried to slow mine down and ran a 16x8 also and still breaks out on 20%. The 13.5x13.5 is to much for anything below 45% IMO.
Thanks for the input, I will try a 14x12N and see what happens.