Originally Posted by
1QwkSport2.5r
I haven't found more than a 200-300rpm gain for every 5% nitro I add to the fuel in many of the engines I've run. Some engines have a marked effect from more nitro, but they are few.
Actually I have found that a 200 RPM gain is quite noticeable power. But if the engine was running less nitro than designed for I have seen as much as a 500 RPM gain per 5%. If too much nitro I have seen gains by decreasing nitro, especially with the normal medium heat glow plug.