This is from another blog
Making Turbo cider (this will knock your socks off)
What you need
4.5L of pure apple juice
1tsp yeast
then
1. Place 3L of apple juice into a demijon (assuming everything is sterile)
2. Place 1tsp of yeast into the demijon
3. shake
4. leave for 36-48hrs to ferment, then top with with the remainder of the juice (cant fill it right up at the start as it will foam quite a bit)
5. leave to ferment out
6. Rack off and drink (or if you like cider fizzy then prime as usual)
Also you can always add honey to flavour it up a bit when you first start it off