Originally Posted by rjstrickjr
If you want more speed out of a gas engine and maintian the low cost of gasoline? Run 92 octane, A high quality synthetic 2 stroke oil at 45-50:1 and as someone already stated a smaller prop with more pitch. That would be the easiest and quickest way to see the improvment.
A common misconception that higher octane gives you more power. Octane is an ignition inhibitor that makes it harder to light gasoline on fire which is added to gasoline used in higher compression engines to prevent detonation (pre-ignition). Higher octane gas only helps if you have a higher compression engine (in the 13:1 range), so on a DLE-55, 92 octane is a waste unless the compression has been increased.