Don't recall the gaps offhand, I have a GX31 in a GP Super Stearman turning a 18X8 at about 6500. I tried the 20X6. While I didn't tach it out, I can tell ya the 31 didn't like that prop! Turn a nice flying plane into a pig!
ORIGINAL: NorfolknGood
Are you guys using the standard plug with 25 thou gap? What should the valve clearances be? what oil should be in the crankcase? Will be Honda throw a 20" X 6" prop for a 1/4 scale WW1 biplane and how many sugars should I put in my coffee
