DoubleSnake C3 will ferment 14-15% alcohol in 3 days, or up to 17% alcohol in 5 days. For 14-15%, use 6 kgs of sugar and top up to 25L with water. For 17% alcohol, use 7 kgs of sugar instead. You can use either normal sugar, or brewing sugar (dose approx 10% extra if using brewing sugar).
This reliable turbo is based on the famous Turbo3 which is a Scandinavian turbo yeast, the first turbo ever produced (that was in the early 1990's) and still going strong in Scandinavia. C3 has a slightly more modern recipe but otherwise very similar. Why change something fantastic.