One thing many ppl don't really think about is their fuel when they get a fresh jug or change brands. I have seen many post about Nitro engines running lean as all-get-out, when they change fuels or buy a new jug of the same brand they have been running all along. Many ppl say one jug is different from the other, even if its from the same brand.
You have to keep in mind that the fuel you are running has Methanol (alcohol blend) and Nitromethane. Both have evaporative properties, which means every time you open your jug of fuel, part of the volatile chemical vapors escape and the percent of nitro, if you are running 20%, becomes around 18% or less and the fuel becomes weaker, by the time you get to the bottem of the jug. So as the Nitro content is depleted, you lean out your carb to get the same proformance out of the fuel. When you get a fresh jug of fuel you are back to 20% (full strength) and all of a sudden your temps go sky high. Therefor you must always retune your carb when you get new fuel or change brands.
The older your fuel is the weaker its going to be, the more air space you have in the jug, the more room the Nitro and methanol has to vaporize and those gasses will escape when you open the jug.
Remember: High nitro-Richer carb settings, Low Nitro-Leaner setting. :hammer:
You have to keep in mind that the fuel you are running has Methanol (alcohol blend) and Nitromethane. Both have evaporative properties, which means every time you open your jug of fuel, part of the volatile chemical vapors escape and the percent of nitro, if you are running 20%, becomes around 18% or less and the fuel becomes weaker, by the time you get to the bottem of the jug. So as the Nitro content is depleted, you lean out your carb to get the same proformance out of the fuel. When you get a fresh jug of fuel you are back to 20% (full strength) and all of a sudden your temps go sky high. Therefor you must always retune your carb when you get new fuel or change brands.
The older your fuel is the weaker its going to be, the more air space you have in the jug, the more room the Nitro and methanol has to vaporize and those gasses will escape when you open the jug.
Remember: High nitro-Richer carb settings, Low Nitro-Leaner setting. :hammer: