I believe that MVVS makes a 20. Thier engines just plain haul butt. They make lots of power and are reliable as well. They are also fairly indestructable. The only down side is they do not like nitro. Most people here reccomend 5%. I have several 40's and use 10%. But I live here in central Pa and am a fair bit over sea level. I have had no problems.

Mark Shuman