Originally Posted by mobydickk

I believe you have this statement backwards, [B]((by the way: less nitro will give a later ignition as well)
later = more rpm but less power
sooner = more power but les rpm and a hotter engine

Less percentage nitro is easier to burn than more nitro.
In your statement above concering more or less RPM, nitro content has nothing to do with top RPM,
the pipe design and pipe length controls top RPM

Hope this helps
moby