ORIGINAL: Fuelman
If you were to take out the head shims and retune the engine, those of you that have been running 30% could easily run 20% or LESS.
Here's some of the benefit of using less nitro:
The same or better power once shims removed and retuned
More runtime per tank
Costs a lot less.
Easier on plugs
Agreed, and having gone to the extreme of removing shims (except for the thinnest one to keep a good seal) and then machining the head button to raise compression even further we run our engine on
ZERO nitro.
Power is identical to similar car/engine using 25% nitro.
Tank gives 8 minutes compared to 6.
Fuel is obviously cheaper considering we make it ourselves.
One plug was changed in 40 hours of racing.