ORIGINAL: groundparrot
You might investigate Magnum's new ''no nitro'' fuel.
This blend was developed to deal with the diminishing nitro supply during the Olympic events in China. As nitro shortage was more widespread, fuel prices went up. Magnum fuels developed this blend to compete with high nitro fuels (30%) to still have comparable power but no nitro and thus lower cost.
If you can get a hold of this fuel, you should try it. It has been reported to make as much power as the 30% nitro blend.
It is called the Heli 30 DS
[link]http://magnumfuels.com/[/link]
They also have 10 DS and 20 DS if you want comparable power to the 10% and 20% nitro.
Rafael