[downquark1]

The upload should be set to the 80% of full capacity (lower if you want to browse the internet at the same time) I use 20KB when I'm not doing anything else (on a 2MB). Try setting the MTU to 1500 (assuming you are using a cable modem). I do not bother limiting the download as it rarely gets that high.

Check if you are getting the green face and your uploads are not getting blocked.

You could try increasing the number of connections per torrent. In an optimal swarm (one with plenty of uploaders) this can be as low as 10, but in public swarms where leeching is common you could raise it to 100 or even unlimited (0). The higher it is the more people you can download from, but you also are sending more needless "stay-alive" packets.

Also try using "use alternative socket polling"