[quote]ORIGINAL: DR.B.S.

Although the higher the nitro the hotter the burn. 5% works pretty good also. Some places in Europe wont let them burn any nitro and that works also, hence the spike in electrics in the past 10 years.
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Yes earlier in the thread I gave this non-politically correct inference . I belive it is similar. Turning your needle valve's out (retards) richens the burn. Some feel it is better for a number of reasons. Do you know what they are? Turning the high and low speed valve in/ closing, leans it out or makes it run hotter. Some say this is bad for a engine, do you know why?
I love nitro. I can't sleep eat or breath without it. It makes my day sunny and bright but that's just me. So have nice good flight's with or without. It's up to the individual.
Happy landings,
The Doc