you mean a .32 glow engine? Or do you mean a 30something CC gasoline engine?

If you mean a .32 glow, then I've run APC 11x4 and APC 10x5 on mine, depending on the airframe. The 11x4 was on a Waco biplane, lots of climb, lower airspeed. The 10x5 was on a small pattern plane with a tuned pipe, and on a combat plane. Mine was an OS .32F