I agree with what RdA suggested but you need to leave out more.. Leaving 5kbps will make a minor difference..
For normal home connections cap ur upload speed and download speed in Utorrent preferences to 80% of what you usually get.. Dun use the speedtest values cuz they are just an estimate.. You knew that for Upload u get 80kbps max.. So cap upload speed to 80% 0f 80 = 64.. Nd do the same for download..

x|D